## INSTRUCTION AND PROGRAMMING MANUAL 

# X9303 2.4

9-CHANNEL COMPUTER RADIO SYSTEM WITH SPEKTRUM 2.4GHz DSM TECHNOLOGY

## Table of Contents

G-2 

### Section 1: Using the Manual .........................................................................................................G-9

Features

......................................................................................................................................................... G-9 Specifications

................................................................................................................................................ G-9 

### Section 2: Transmitter and Receiver Specifications .................................................................G-9 JR X9303 Transmitter

..................................................................................................................................... G-9 JR R921 Receiver

.......................................................................................................................................... G-10
Features

....................................................................................................................................................... G-10 Specifications

.............................................................................................................................................. G-10 

### Section 3: Component Specifications .......................................................................................G-11 Servo Specifications

...................................................................................................................................... G-11 

### Charger Specifications .................................................................................................................G-11 Airborne Battery Pack .................................................................................................................G-11

Airborne Battery Pack Specifications ...................................................................................................G-11 

### Battery Charging ...........................................................................................................................G-12

Transmitter/Receiver

.................................................................................................................................... G-12

JR Transmitter Charging ...........................................................................................................................G-12 Using the Included Charger ....................................................................................................................G-12 

### X9303 2.4 Transmitter Features (Mode 2 Airplane Shown) ...............................................G-13 X9303 2.4 Transmitter Features (Rear) ...................................................................................G-14

Battery Cover

............................................................................................................................................ G-14 

### X9303 2.4 Transmitter Features (Internal) .............................................................................G-15 Control Stick Tension Adjustment .............................................................................................................G-15

Back of Transmitter (Mode 2) ................................................................................................................G-15 Advanced Digital Trims

................................................................................................................................ G-16 Control Stick Length

.................................................................................................................................... G-16 Neckstrap Attachment

................................................................................................................................. G-16 Installing the Receiver

.................................................................................................................................. G-17

Installing the JR R921 ...............................................................................................................................G-17 

### Model Match

.................................................................................................................................. G-18

Other Important Installation Tips .........................................................................................................G-18 

### Binding

............................................................................................................................................. G-19

How To Bind

................................................................................................................................................... G-19
Fail-Safe Functions

......................................................................................................................................... G-20
SmartSafe

........................................................................................................................................................ G-20

Receiver Power Only ...............................................................................................................................G-20 After Connection

...................................................................................................................................... G-20 Preset Fail-Safe

............................................................................................................................................... G-20

Receiver Power Only ...............................................................................................................................G-20 After Connection

...................................................................................................................................... G-20 Programming SmartSafe ..............................................................................................................................G-20

(All Spektrum Aircraft Receivers) .........................................................................................................G-20 Programming Preset Fail-Safe .....................................................................................................................G-21

(JR R921 and Spektrum AR 9000 Receivers Only) ...........................................................................G-21

## Table of Contents

G-3 

### Standard Range Testing ................................................................................................................G-21

Range Testing the X9303 2.4 ..................................................................................................................G-21 

### Advanced Range Testing Using a Flight Log ............................................................................G-22

Advanced Range Testing the X9303 2.4 ...............................................................................................G-22 

### Flight Log—Optional for JR R921 Receiver ...........................................................................G-23

Using the Flight Log

.................................................................................................................................. G-23 

### Receiver Power System Requirements ....................................................................................G-24 Recommended Power System Guidelines ...............................................................................................G-24 

### Flash Memory

................................................................................................................................ G-25 Battery Alarm and Display ..........................................................................................................G-25 Tip on Using 2.4GHz Systems ...................................................................................................G-25

AIRPLANE – ACRO MODE .........................................................................................................A-1

Flight Modes

.................................................................................................................................................. A-1
ACRO PROGRAMMING - PLEASE READ ...........................................................................................A-1
ACRO - GETTING STARTED – SYSTEM MENU BASICS ................................................................A-1
ACCESS THE SYSTEM MENU ......................................................................................................................A-2
SELECT A MODEL MEMORY .......................................................................................................................A-2
RESET THE MODEL

........................................................................................................................................ A-3
TO ACTIVATE THE ACRO MODE ..............................................................................................................A-4
ENTER A NAME FOR THE MODEL ...........................................................................................................A-4


### ACRO - SYSTEM MENU - ADVANCED FUNCTIONS ........................................................A-5

FLIGHT MODES

.............................................................................................................................................. A-6 To Activate Flight Modes

................................................................................................................................ A-7 TRIM:COM (Flight Modes) ............................................................................................................................A-8 D/R:SW (Flight Modes)

.................................................................................................................................. A-8
SWITCH ASSIGNMENTS ..............................................................................................................................A-9
FLAP TRIM ON/OFF

....................................................................................................................................... A-9
ACTIVATE/INHIBIT SWITCHES ............................................................................................................... A-10
WING TYPE

................................................................................................................................................... A-11 WING Parameter – (Wing Type) .............................................................................................................. A-12 V-tail (Wing Type)

.......................................................................................................................................... A-14 Dual Channels (Wing Type) ........................................................................................................................ A-14 Twin E. (Wing Type)

...................................................................................................................................... A-16
TRIM STEP

...................................................................................................................................................... A-18

ACRO – FUNCTION LIST .................................................................................................................... A-19
REV.SW – SERVO REVERSING ................................................................................................................ A-19
SUB TRIM

........................................................................................................................................................ A-20 TRVL ADJ. – TRAVEL ADJUST ................................................................................................................... A-21
D/R & EXP – DUAL RATE AND EXPONENTIAL ............................................................................... A-22
THRO CURV – THROTTLE CURVE ........................................................................................................ A-23
FLAP SYS. – FLAP SYSTEM ......................................................................................................................... A-25 AUTO LAND (Flap System) ....................................................................................................................... A-26 ELEV – ELEVATOR COMPENSATION (Flap System) .......................................................................... A-27

## Table of Contents

G-4 FLAP – (Flap System)

................................................................................................................................... A-28 FM0-FM2 (Flap System) ............................................................................................................................... A-29 Delay (Flap System)

...................................................................................................................................... A-30
ELE  FLP M – ELEVATOR-TO-FLAP MIXING ...................................................................................... A-31
AIL  RUD M – AILERON-TO-RUDDER MIXING ............................................................................. A-32
AIL DIFF. – AILERON DIFFERENTIAL ..................................................................................................... A-33
SRV. SPEED – SERVO SPEED ...................................................................................................................... A-35
SNAP ROLL.................................................................................................................................................... A-36
GYRO SYS. – GYRO SYSTEM .................................................................................................................... A-37 GYRO CONNECTIONS (Gyro System) ................................................................................................ A-37 FIXED GYRO GAIN (Gyro System) ........................................................................................................ A-38 STICK OVERRIDE GYRO GAIN (Gyro System) .................................................................................. A-39
PROG MIX – PROGRAMMABLE MIXERS ............................................................................................. A-40 STANDARD PROGRAMMABLE MIXER – Example: DOWN ELEVATOR AT IDLE ..................... A-41 MULTI-POINT MIXER – Example: ELIMINATE PITCH-COUPLING ............................................... A-43
TRAINER – TRAINER SYSTEM ................................................................................................................. A-45 XP9303 USED AS MASTER (INSTRUCTOR) – (Trainer System) ..................................................... A-45 X9303 2.4 USED AS SLAVE (STUDENT) – (Trainer System) ............................................................ A-46
TIMER – TIMER SYSTEM ............................................................................................................................. A-47
MONITOR...................................................................................................................................................... A-48
UTILITY FUNCTIONS

................................................................................................................................ A-49
COPY – COPY THE CURRENTLY SELECTED MODEL TO ANOTHER MODEL MEMORY ... A-49
TRANSFER – TRANSFER THE MODEL TO ANOTHER TRANSMITTER OR TO DataSafe ....... A-51 RECEIVE A MODEL INTO THE X9303 2.4 – (Transfer function)..................................................... A-51 RECEIVE A MODEL INTO THE X9303 2.4 – (Transfer function)..................................................... A-52
SUB TRIM USAGE AND MECHANICAL ADVANTAGE ..................................................................... A-53

SUB TRIM

.................................................................................................................................................... A-53 MECHANICAL ADVANTAGE ............................................................................................................... A-53 DUAL RATES AND EXPONENTIAL CURVES ..................................................................................... A-54 Setup Sheet (Aircraft)

.................................................................................................................................. A-55 

### X9303 2.4 Helicopter – Heli Mode ...........................................................................................H-1

INTRODUCTION

...................................................................................................................................... H-1
Heli PROGRAMMING - PLEASE READ .................................................................................................... H-1
HELI - GETTING STARTED – SYSTEM MENU BASICS ....................................................................... H-1
ACCESS THE SYSTEM MENU ..................................................................................................................... H-2
Model SEL- Model Selection ......................................................................................................................... H-2 Copy – Copying the Currently Selected Model to Another Model Memory ................................... H-3
Data Reset – RESET THE MODEL ............................................................................................................. H-5 Type Select – TO ACTIVATE THE HELI MODE ....................................................................................... H-6
MDL Name-ENTER A NAME FOR THE MODEL ................................................................................... H-6
TRANSFER – TRANSFER THE MODEL TO ANOTHER TRANSMITTER OR TO DATASAFE .... H-7 TRANSFER A MODEL FROM THE X9303 2.4 – (Transfer function) – To Send .............................. H-7 TRANSFER A MODEL TO THE X9303 2.4 – (Transfer function) – To Receive ............................... H-8
TRIM STEP

........................................................................................................................................................ H-9

## Table of Contents

G-5 HELI - SYSTEM MENU - ADVANCED FUNCTIONS ..........................................................................H-10
ADDITIONAL FLIGHT MODES 3 and 4 ...............................................................................................H-10 RUD TRIM: COM – (Flight Mode Trim Options) ...................................................................................H-11
SWITCH ASSIGNMENTS ...........................................................................................................................H-11
ACTIVATE/DEACTIVATE SWITCHES .....................................................................................................H-12
GOVERNOR PROGRAM ACTIVATION ................................................................................................H-12
SWASH TYP-SWASHPLATE TYPE ............................................................................................................H-13 Accessing the Swashplate Type Function .................................................................................................H-13


### FUNCTION MODE .....................................................................................................................H-14

HELI – FUNCTION LIST ............................................................................................................................H-14
D/R & EXP – DUAL RATE AND EXPONENTIAL ...............................................................................H-14
Auto Dual Rate

.............................................................................................................................................. H-15
REV.SW - SERVO REVERSING .................................................................................................................H-15
Sub Trim

........................................................................................................................................................... H-16 TRVL ADJ. – TRAVEL ADJUST ...................................................................................................................H-17 Swash Mix- CCPM SWASHPLATE Mixing .............................................................................................H-18

Variations of CCPM Mixing ....................................................................................................................H-18 CCPM Servo Connection/Channel Numbers ....................................................................................H-18 Accessing the Swashplate Mixing Function .........................................................................................H-19 CCPM Exponential (EXP) ...........................................................................................................................H-19
THRO HOLD- THROTTLE HOLD ..........................................................................................................H-20

Accessing the Throttle Hold Function .................................................................................................H-20 Stick Auto/Auto Cut Setting .......................................................................................................................H-21 Hold Delay

...................................................................................................................................................... H-21
THRO CURV – THROTTLE CURVES ......................................................................................................H-22

Accessing the Throttle Curve Function ...............................................................................................H-23 Throttle Trim Lever Function .....................................................................................................................H-24 Hovering Throttle Lever ..............................................................................................................................H-24 Throttle Curve Exponential .......................................................................................................................H-24

Accessing the Throttle Curve Exponential Function ........................................................................H-24 PIT. CURV/PITCH CURVES Function .......................................................................................................H-25

Accessing the Pitch Curve Function .....................................................................................................H-25 Hovering Pitch Lever

.................................................................................................................................... H-26

Example of Throttle Curve and Pitch Curve Settings ......................................................................H-26 Accessing the Revolution Mixing Function .........................................................................................H-27 Setting up Revolution Mixing..................................................................................................................H-27 REVO.MIX/Revo Mix Function: Non Heading Lock Gyros Only .......................................................H-27 GYRO SENS/Gyro Gain Function .............................................................................................................H-28

Accessing the Gyro Gain Function .......................................................................................................H-28 Gyro Remote Gain Connections: JR G500T, JR770 and Others ...................................................H-29 Remote Gain Gyros

..................................................................................................................................... H-29 Mixing – Cyclic-to-Throttle Mixing ...........................................................................................................H-29 Rudder-to-Throttle Mixing .........................................................................................................................H-30

Accessing the Cyclic-to-Throttle Function .........................................................................................H-31

## Table of Contents

G-6 Aileron-to-Throttle and Elevator-to-Throttle Mixing ...........................................................................H-31 Setting the Desired Flight Modes for Cyclic-to-Throttle Mixing ...................................................H-31 GOVERNOR- GOVERNOR FUNCTION .............................................................................................H-32

Accessing the Governor Function ........................................................................................................H-32 PROG MIX 1-6 – PROGRAMMABLE MIXES 1 through 6 ..................................................................H-33 Swashplate Timing Mixes Example: Elevator-to-Aileron (Corrects Vertical Tracking)....................H-35 Swashplate Timing: Aileron-to-Elevator (Corrects Rolling Maneuvers) ............................................H-37

STANDARD PROGRAMMABLE MIXES – Example: Right Aileron with Positive Pitch ............H-39 MULTI-POINT MIXES – Example: FMOD to Gear Mixing (Retract and other Functions) .........H-41 Trainer – Programmable Trainer System..................................................................................................H-44

X9303 2.4 USED AS MASTER (INSTRUCTOR) – (Trainer System) ............................................H-44 X9303 2.4 USED AS SLAVE (STUDENT) – (Trainer System) ........................................................H-45 Timer – Timer System

................................................................................................................................. H-46
MONITOR- SERVO MONITOR ...............................................................................................................H-47 Setup Sheet (Helicopter) .............................................................................................................................H-48 

### Sailplane – GLID Mode...................................................................................................................S-1

SYSTEM MODE GLID FEATURES ...........................................................................................................S-1
FUNCTION MODE GLID FEATURES ...................................................................................................S-1 System Mode

...................................................................................................................................................... S-2 System Mode

...................................................................................................................................................... S-2

To enter System Mode:

................................................................................................................................ S-2 Model Select

....................................................................................................................................................... S-3 Copy – Copying the Currently Selected Model to Another Model Memory .....................................S-4
Model Name

...................................................................................................................................................... S-6 Type Select

.......................................................................................................................................................... S-6
Model Reset

....................................................................................................................................................... S-7
TRANSFER – Transfer the Model to Another Transmitter or to DataSafe .........................................S-8 TRANSFER a model from the X9303 2.4 – (Transfer function) ............................................................S-8 TRANSFER a model to the X9303 2.4 – (Transfer function) .................................................................S-9 Trim Step

.......................................................................................................................................................... S-10
Device Select

................................................................................................................................................... S-11

Flight Modes

................................................................................................................................................ S-11 Activating and Assigning Flight Modes ....................................................................................................... S-12
Motor Function

.............................................................................................................................................. S-13 Flap and AUX Functions ............................................................................................................................... S-14

Activating / Inhibiting Channels .............................................................................................................. S-14 Wing Type

........................................................................................................................................................ S-15

Function Mode

........................................................................................................................................... S-16
D/R & EXP – DUAL RATE AND EXPONENTIAL ................................................................................ S-18
REV.SW – SERVO REVERSING ................................................................................................................. S-19
SUB TRIM

......................................................................................................................................................... S-20 TRVL. ADJ - TRAVEL ADJUST ..................................................................................................................... S-21 Elevator-to-Flap Mix

...................................................................................................................................... S-21 Aileron-to-Flap Mix

....................................................................................................................................... S-22
Differential

....................................................................................................................................................... S-22

## Table of Contents

G-7 Camber Adjust

................................................................................................................................................ S-23
Camber Mix

.................................................................................................................................................... S-24
Aileron-to-Rudder Mix

................................................................................................................................. S-25 Butterfly Mix (Landing Flaps) ....................................................................................................................... S-26 Flap Rate........................................................................................................................................................... S-27
Motor Hold

..................................................................................................................................................... S-27 Programmable Curve Mix 1 (Programmed for Spoiler-to-Elevator Mix).......................................... S-28
PROG MIX - PROGRAMMABLE MIXERS ............................................................................................... S-29
MULTI-POINT PROGRAMMABLE MIXER ............................................................................................. S-33 Trainer – Programmable Trainer System................................................................................................... S-36

X9303 2.4 USED AS MASTER (INSTRUCTOR) – (Trainer System) ............................................. S-36 X9303 2.4 USED AS SLAVE (STUDENT) – (Trainer System) ......................................................... S-37 Timer

................................................................................................................................................................ S-37
Monitor

............................................................................................................................................................ S-38 

### Programming a 6-Channel Sailplane by Engineering Manager John Adams ......................S-39

Channel Assignment

.................................................................................................................................. S-41 Step #1 Servo Assignment .......................................................................................................................... S-41 Step #2- System Mode

.................................................................................................................................. S-42 Step #3 Selecting a Model Memory ........................................................................................................... S-42 Step #4 Selecting Model Type...................................................................................................................... S-43 Step #5 Naming a Model .............................................................................................................................. S-43 Step #6 Turning Off the Spoiler Stick Trim ............................................................................................... S-44 Step #7 Establishing Flight Modes .............................................................................................................. S-44 Step #8 Wing and Tail Type Select .............................................................................................................. S-45 Step #9 Entering FUNC.LIST ...................................................................................................................... S-45 Step #10 Servo Reversing ............................................................................................................................ S-46 Step #11 Sub Trim

.......................................................................................................................................... S-47 Step #12 Travel Adjust

................................................................................................................................... S-48 Step #13 Butterfly (Landing Flaps) ............................................................................................................. S-48

Setting-up Flight Modes ............................................................................................................................ S-49 Launch Mode Setup

................................................................................................................................... S-49 Step #14 Spoiler to Elevator Curve Mix (Programmable Mix 1) ....................................................... S-49 Step #15 Launch Pre-sets ............................................................................................................................ S-50 Step #16 Dual Rate and Exponential ......................................................................................................... S-51 Step #17 Elevator-to-Flap Mix .................................................................................................................... S-51 Step #18 Aileron-to-Flap .............................................................................................................................. S-52 Step #19 Aileron Differential ....................................................................................................................... S-52

Flaperon Mix

............................................................................................................................................... S-53 Step #20 Flap Rate, Camber Mix and Camber Adjust ........................................................................... S-53 Step #21 Flap Rate, Camber Mix and Camber Adjust (continued) .................................................... S-54

Flaperon Mix

............................................................................................................................................... S-54 Flaperon Mix Delay

.................................................................................................................................... S-54 Setting up Cruise Mode ............................................................................................................................ S-55 Step #22- Aileron-to-Rudder Mix ............................................................................................................. S-55 Step #23 Cruise Pre-sets ............................................................................................................................. S-56G-8 Step #24 Dual Rate and Exponential ......................................................................................................... S-56 Step #25 Elevator-to-Flap Mix .................................................................................................................... S-57 Step #26 Aileron-to-Flap .............................................................................................................................. S-58 Step #27 Aileron Differential ....................................................................................................................... S-58

Flap Rate

...................................................................................................................................................... S-59 Flaperon Mix

............................................................................................................................................... S-59 Step #28 Flap Rate, Camber Mix and Camber Adjust ........................................................................... S-59 Step #29 Flap Rate, Camber Mix and Camber Adjust (continued) .................................................... S-60

Flaperon Mix Delay

.................................................................................................................................... S-60 Setting Up Land Mode .............................................................................................................................. S-61 Step #30 Aileron-to-Rudder Mix .............................................................................................................. S-61 Step #31 Land Pre-sets

................................................................................................................................. S-62 Step #32 Dual Rate and Exponential ......................................................................................................... S-63 Step #33 Elevator-to-Flap Mix .................................................................................................................... S-64 Step #34 Aileron-to-Flap .............................................................................................................................. S-64 Step #35 Aileron Differential ....................................................................................................................... S-64

Flaperon Mix

............................................................................................................................................... S-65 Flaperon Mix

............................................................................................................................................... S-65 Step #36 Flap Rate, Camber Mix and Camber Adjust ........................................................................... S-65 Step #37 Flap Rate, Camber Mix and Camber Adjust (continued) .................................................... S-66 Step #38 Aileron-to-Rudder Mix .............................................................................................................. S-66

Flaperon Mix Delay

.................................................................................................................................... S-66 Setup Sheet (Sailplane)

.................................................................................................................................. S-67
Servo Precautions

.......................................................................................................................................... W- 1
General notes

................................................................................................................................................. W- 1
Federal Aviation Administration

.................................................................................................................. W- 2 1. Purpose

.................................................................................................................................................... W- 2 2. Background

.............................................................................................................................................. W- 2 3. Operating Standards

............................................................................................................................. W- 2 Warning

........................................................................................................................................................ W- 3 Warranty Period

........................................................................................................................................ W- 3 Limited Warranty

....................................................................................................................................... W- 3 Damage Limits

............................................................................................................................................ W- 3 Safety Precautions

...................................................................................................................................... W- 3 Questions, Assistance, and Repairs

........................................................................................................ W- 3 Warranty and Service Information

............................................................................................................ W- 3 Warranty and Service Information

............................................................................................................ W- 4

Inspection or Repairs

................................................................................................................................ W- 4 Warranty Inspection and Repairs

........................................................................................................... W- 4 Non-Warranty Repairs

............................................................................................................................. W- 4 Safety, Precautions, and Warnings

........................................................................................................... W- 4 Instructions for Disposal of WEEE by Users in the European Union

............................................ W- 5 FCC Information

........................................................................................................................................ W- 5

### JR X9303 Transmitter 

## Section 2: Transmitter and Receiver Specifications Section 1: Using the Manual

G-9 JR’s X9303 2.4 offers airplane, helicopter and sailplane pilots sophisticated programming that JR’s 9303 is famous for with the added benefits of fully integrated Spektrum 2.4GHz DSM ® radio link technology. DSM (Digital Spektrum Modulation) technology offers a far superior RF link than narrow band 72MHz FM and PCM systems, providing a higher level of confidence and safety. Now with even the most sophisticated models up to 9 channels, you’ll no longer have to wait for an open frequency, worry about someone unintentionally powering up on the same frequency, or have to plan a frequency-based flight matrix for competition. And for response-critical aircraft like 3D helicopters and airplanes, latency (the time it takes for a stick input to translate to a servo output) is significantly reduced providing a more responsive precise connection to your model.

Features • Fully integrated 2.4GHz Spektrum RF link • Sophisticated three-model-type programming: Airplane, Helicopter, Sailplane
• Patented DuaLink TM Technology
• ModelMatch TM • ServoSync TM • Rolling Selector input • Digital 3+1 trims • 30-model memory

Specifications • Model number—Airplane/Sailplane (JRP2910), Helicopter (JRP2920)
• Number of channels—9 • Modulation type—Direct Sequence Spread Spectrum DSM2/ DSM1 protocol
• Band—2.400 to 2.483GHz • Spectral capacity—40 simultaneous systems • Transmitter Current—180mA/DSM2 280mA/ DSM1
• Resolution—2048 w/R921 receiver In the front of this manual you will find common transmitter features and specifications plus information on the included components and accessories. Guidelines for receiver and servo installation are also included. In each section of this manual (Air, Heli and Sailplane) are instructions for adjusting model-specific programming and functions. An explanation of the purpose of each programming function is provided, followed by an illustration of its corresponding LCD display and instructions on how to access and adjust the function. A blank data sheet has been included at the end of each section, as well as on the JR web site. Once all data has been input for a particular model, it is highly recommended that you record these values and settings on a copy of the data sheet, so in the rare event of a loss of memory, these settings are available.

Note: The manual for the X9303 2.4 manual is posted online at www.horizonhobby.com in the support section or it can be ordered from your local hobby dealer or directly from Horizon Hobby.

### JR R921 Receiver

G-10 The R921 receiver combines two internal with one or two (optional) remote receivers, offering superior path diversity. The radio system simultaneously transmits on two frequencies, creating up to four RF paths on two different 2.4GHz channels. This multi path redundancy, plus the fact that each of the up to 4 receivers are located in different locations throughout the aircraft exposes each to a different RF environment creating a superior RF link in all conditions. The JR R921 allows the use of an optional Flight Log Data Recorder (SPM5940) to be used. The flight log plugs into the data port and provides quality of RF link data of the previous flight allowing the confirmation of the operational performance of the systems.

Features

• 9 channels
• 2 internal receivers • 1 or 2 (optional) remote receiver(s) • Patented multi-link technology • Two types of fail-safe—SmartSafe and Preprogrammed fail-safe • Flight Log compatible

Specifications
• Number of Channels—9
• Modulation—DSM2
• Band—2.400 to 2.4835GHz • Dimensions (WxLxH)—.35”x2.06”x0.55” • Weight—Main 15g/.6oz Remote 3g/.2 oz each
• Current—70mA • Voltage range—3.5 to 9.6V

Note : The X9303 2.4 is compatible with all current Spektrum DSM aircraft receivers including:
AR6000 6-channel parkflyer receiver AR6100 6-channel 3.5-gram parkflyer receiver AR6200 6-channel full-range receiver AR7000 7-channel full-range receiver AR9000 9-channel full-range receiver Important : When using the X9303 2.4 with parkflyer receivers (the AR6000 and AR6100), it’s imperative that these receivers only be flown in parkflyer-type aircraft (small electric airplanes or mini and micro helicopters). Flying receivers designed for parkflyers in larger aircraft could cause loss of control.

### Servo Specifications 

## Section 3: Component Specifications

Charger Specifications

G-11 Type DS821 Torque 72 oz/in Speed .19 Weight 1.5 oz Size (in) (L x W x H) .74x1.50x1.47 Ball Bearing Yes
Motor 3-pole Ferrite

Model Number AD35M05 Input Voltage AC 120V, 60Hz Output Current 11.6V Tx/110mAh, 5.8V Rx/110mAh Charging Time 15 hours



## Airborne Battery Pack

Airborne Battery Pack Specifications

Model Number B1100 Voltage 4.8V Size (in) (L x W x H) 2.24 x 0.63 x 1.70 Weight (oz) 4.9

### Transmitter/Receiver 

## Battery Charging

G-12 Note : It is imperative that you fully charge both the transmitter and the receiver battery packs prior to each flying session and that you check the condition of the receiver battery between each flight using a reliable battery tester with a built-in load. The included wall charger slow charges at a 110mA rate. In order to fully charge the included batteries, it’s necessary to leave the charger and batteries hooked up to the included wall charger for 15 hours.

An optional fast charger can be used to charge both the transmitter and receiver batteries, however, it’s imperative that the batteries are properly charged and the charge condition be checked prior to flight. False peaking is a common occurrence with many fast chargers (batteries giving an indication the battery is fully charged when in fact the battery is only partially charged). False peaking can lead to disastrous results and it is the pilot’s responsibility to verify the charge condition of the batteries before every flight. (Also see Receiver Power Requirements page G-24)
JR Transmitter Charging
The center pin on all JR® and Spektrum TM transmitters is negative. Therefore, the center pin on all JR chargers is negative, not positive. This is different from many other manufacturers’ chargers and radio systems. Beware of improper connections based on “color-coded” wire leads, as they may not apply in this instance. You must make sure that the center pin of your JR transmitter is always connected to the negative pole for correct polarity.

Note : When using a fast charger to charge the transmitter battery do not exceed 1.5 amps (or 1500mAh) charge rate or damage to the transmitter or battery damage can occur. Using the Included Charger
The pilot lamps should always be on during the charging operation. If not, check to make sure that both the transmitter and receiver are switched off.

Do not use the charger for equipment other than JR. The charging plug polarity may not be the same. Equipment damage can result.

Do not use other manufacturers’ after-market accessories that plug into the transmitter’s charging jack if you are unsure of the polarity compatibility with your radio. Seek expert advice to avoid possible damage.

During the charging operation, the charger’s temperature is slightly elevated. CENTER PIN IS NEGATIVE

OUTSIDE IS POSITIVE

CHARGER PIGTAIL FOR RECEIVER CHARGER PIGTAIL FOR TRANSMITTER

BLACK TO POSITIVE

RED TO NEGATIVE RIGHT SIDE OF TRANSMITTER

RED–POSITIVE / BROWN–NEGATIVE / ORANGE–SIGNAL

## X9303 2.4 Transmitter Features (Mode 2 Airplane Shown)

G-13 Trainer Button Gear Switch

Flap Switch Elevator Dual Rate

Flap Trim

Lever AUX4/ Rudder Dual Rate Aux Trim Aileron Dual Rate AUX2 Mix Switch

Lever

Elevator/ Aileron Stick Throttle/ Rudder Stick

Rudder Trim Throttle Trim

List Button Enter Button

Clear Button

Power Switch Aileron Trim Elevator Trim

Rolling Selector

LCD Display

## X9303 2.4 Transmitter Features (Rear)

G-14 Model No. X9303

FCC ID: BRWDAMTX10

IC: 6157 A-BRWDAMT
HORIZON HOBBY, INC. MADE IN JAPAN



## Battery Cover

CAUTION: THE BATTERY CONNECTION IS KEYED SO THAT IT CAN ONLY BE PLUGGED IN ONE DIRECTION. DO NOT FORCE.

## X9303 2.4 Transmitter Features (Internal)

Control Stick Tension Adjustment

G-15 Remove the six transmitter screws from the back cover as shown on page G-14. Remove the transmitter back, being careful not to cause damage to any components. Adjust each gimbal tension screw for desired tension (counter-clockwise to loosen stick tension; clockwise to tighten stick tension). When adjusting the throttle ratchet tension, make sure that the adjusting screw does not touch the PC board after adjustment is complete. 

## Back of Transmitter (Mode 2) THROTTLE TENSION SCREW

RUDDER TENSION SCREW ELEVATOR TENSION SCREW AILERON TENSION SCREW

### Control Stick Length

Neckstrap Attachment

G-16 

### Advanced Digital Trims

The X9303 2.4 features Advanced digital trims. On the Normal display screen, if a trim lever is moved, the screen will automatically change to display the graphic position for the trim being adjusted. The X9303 2.4’s Aileron, Elevator, and Rudder trim levers feature an audible center trim beep. This is helpful in determining the trim levers’ center position during flight. In addition, the frequency of each trim step changes from full right/up to full left/down, allowing the pilot to be aware of the general trim position audibly without looking at the transmitter. By using the Trim Step Function located in the System Mode, the amount of travel per each trim step can be adjusted as needed to match your specific application.

Please note that when the X9303 2.4 transmitter is turned off, the trim values are stored in memory and are recalled when the system is turned back on.

Use a 2mm Allen wrench to unlock the setscrew to adjust the stick length. Turn the wrench counterclockwise to loosen the screw. Then, turn the stick clockwise to shorten or counterclockwise to lengthen the overall stick length. After the control stick length has been adjusted to suit your flying style, tighten the 2mm setscrew. If you desire longer sticks, JR® offers a stick (JRPA047) that is approximately one inch longer than standard, and has various length anodized aluminum stick ends available (JRPA040- JRPA045). These stick ends are crafted from bar stock aluminum, and are available at your local JR dealer.

An eyelet is provided on the face of the X9303 2.4 transmitter that allows you to connect a Neck Strap (JRPA023). LOOSEN

TIGHTEN SETSCREW

### Installing the Receiver

G-17 Installing the JR R921

The JR R921 incorporates dual internal receivers, and one or two remote receivers offering the security of up to four simultaneous RF links for the ultimate in multi-path RF security. Two internal receivers are located on the main PC board, while a third remote receiver must be plugged into one of the antenna ports in order for the system to operate. Optionally, a second remote receiver can be plugged into the remaining remote antenna port giving a total of four operational receivers. By locating these receivers in different locations throughout the aircraft, each receiver is exposed to its own RF environment, greatly improving path diversity (the ability of the receiver to see the signal in all conditions).

Note : The JR R921 requires that at least one remote receiver be used.

Install the main receiver using the same method you would use to install a conventional receiver in your aircraft. Typically wrap the main receiver in protective foam and fasten it in place using rubber bands or Velcro straps. Alternately in electric models or in jets (low vibration), it’s acceptable to use thick double-sided foam tape to fasten the main receiver in place. Mounting the remote receiver(s) in a different location(s), from the primary receiver, gives tremendous improvements in path diversity. Essentially each receiver sees a different RF environment and this is the key to maintaining a solid RF link, even in aircraft that have substantial conductive materials, (i.e. Turbine engines with metal tail pipes, carbon fiber, tuned pipes, etc.) which can attenuate the signal.
Using double-sided foam tape, (servo tape) mount the remote receiver(s) keeping the remote antenna(s) at least 2 inches away from the primary antenna. Ideally the antennas will be oriented perpendicular to each other; however, we’ve found this to not be critical. 6-inch, 9-inch, 12-inch, 24-inch and 36-inch leads are available and in sophisticated aircraft, we’ve found it best to mount the remote receivers in different parts of the aircraft keeping the remote antennas as far away as practical from any conductive materials. A typical installation would include the main receiver mounted in the conventional location in the fuselage and the remote antennas in the nose (jets) in the top turtle deck and even in the tail. The optimum location is as far away from any conductive materials as practical.G-18 In helicopters, there is generally enough room on the servo tray to achieve the necessary separation. If necessary, a mount can be made using clear plastic to mount the external antenna as shown below. Other Important Installation Tips 1. The servos should be mounted using rubber grommets and brass eyelets to isolate them from vibration. Do not over-tighten the mounting screws; this will negate the vibration absorption effect of the rubber grommets. The following diagram will assist you in properly mounting your servo. The brass eyelets are pushed from the bottom up in the rubber grommets. When the servo screw is tightened securely, it provides the proper security as well as the proper vibration isolation for your servo. 2. The servos must be able to move freely over their entire range of travel. Make sure that the control linkages do not bind or impede the movement of any of the servos. 3. Mount all switches away from the engine exhaust and away from any high vibration areas. Make sure the switch operates freely and is able to operate over its full travel.



## Model Match

The X9303 2.4 features patented ModelMatch technology that prevents the operation of a model if the wrong model memory is selected. During binding, the receiver actually learns and remembers the specific model memory (1 thru 30) that the transmitter is currently programmed to. Later if the incorrect model memory in the transmitter is selected and the receiver is turned on, the model simply won’t operate, preventing a possible crash. Change programming to the correct model memory and you’re set to fly. Servo Mounting Tab

Screw

Rubber Grommet
Brass EyeletG-19 It’s necessary to program the receiver to the transmitter so that the receiver will only recognize that specific transmitter, ignoring signals from any other sources. If the receiver is not bound to the transmitter, the system will not operate. During binding, the servo’s fail-safe positions are stored.
The following sequence describes the binding procedure for the JR R921, however, all JR and Spektrum DSM aircraft receivers are bound in the same way.



### How To Bind
1. With the system hooked up as shown, insert the bind plug in the charge plug receptacle. The switch must be a 3-wire type switch (JRPA001 or JRPA004) to enter the bind mode through the switch. If a 3-wire switch is not available, install the male bind plug into the charge plug receptacle and power the receiver through any other open port to enter bind mode. REMOVE BEFORE USE

2. Turn on the receiver switch. Note that the LED’s on all receivers should be flashing, indicating that the receiver is ready to bind.

AR9000 3. Establish the desired fail-safe stick positions: normally low throttle and flight controls neutral.

4. Press and hold the bind button on the back of the transmitter while turning on the power switch. The bind button should flash and within a few seconds the system should connect. The LED’s on the receivers should go solid, indicating the system has connected.

5. Remove the bind plug from the receiver or switch harness and store it in a convenient place. 6. After you’ve programmed your model, it’s important to rebind the system so the true low throttle and neutral control surface positions are programmed.

Note : To bind an aircraft with an electronic speed controller that powers the receiver through the throttle channel (BEC), insert the bind plug into the battery port and proceed to Step #2. 

## BindingG-20 The JR R921 receiver features two types of fail-safe: SmartSafe and Preset Fail-safe.



### SmartSafe

This type of fail-safe is especially ideal for most types of electric aircraft and is also recommended for most types of gas- and glow-powered airplanes and helicopters. Here’s how SmartSafe works.
Receiver Power Only

When the receiver only is turned on (no transmitter signal is present), all servos except for the throttle are driven to their preset fail-safe positions, normally control surfaces at neutral and the landing gear down. These fail-safe positions are stored in the receiver during binding. At this time the throttle channel has no output, to avoid operating or arming the electronic speed control. In glow-powered models, the throttle servo has no input so it remains in its current position.

After Connection

When the transmitter is turned on and after the receiver connects to the transmitter, normal control of all channels occurs. After the system makes a connection, if loss of signal occurs, SmartSafe drives the throttle servo only to its preset fail-safe position (low throttle) that was set during binding. All other channels hold their last position. When the signal is regained, the system immediately (less than 4 ms) regains control. 

### Preset Fail-Safe

Preset fail-safe is ideal for sailplanes and is preferred by some modelers for their glow- and gas-powered aircraft.
Receiver Power Only

When the receiver only is turned on (no transmitter signal is present) all servos except for the throttle are driven to their preset fail-safe positions, normally control surfaces at neutral and the landing gear down. These fail-safe positions are stored in the receiver during binding. At this time the throttle channel has no output, to avoid operating or arming the electronic speed control. In glow-powered models, the throttle servo has no input so it remains in its current position.

After Connection

When the transmitter is turned on and after the receiver connects to the transmitter, normal control of all channels occurs. After the system makes a connection, if loss of signal occurs preset fail-safe drives all servos to their preset fail-safe positions. For sailplanes, it’s recommended that the spoilers/flaps deploy to de-thermalize the aircraft, preventing a flyaway. Some powered modelers prefer to use this fail-safe system to program a slight turn and low throttle to prevent their aircraft from flying away. When the signal is regained, the system immediately (in less than 4 ms regains control). 

### Programming SmartSafe

(All Spektrum Aircraft Receivers)

During the binding process the bind plug is left in throughout the process and is removed only after the receiver connects to the transmitter. After the connection is made, confirmed by operating the servos, the bind plug can be removed. The receiver is now programmed for SmartSafe. 

### Fail-Safe FunctionsG-21 (JR R921 and Spektrum AR 9000 Receivers Only)

During the binding process, the bind plug is inserted in the bind port or in the charge jack, then the receiver is powered up. The LED’s in each receiver should blink, indicating that the receiver is in bind mode. Now before binding the receiver to the transmitter and with the receiver in bind mode, remove the bind plug. The LED’s will still be blinking. With the control sticks and switches in the desired fail-safe positions, bind the transmitter to the receiver by pressing and holding the bind buttons on the back of the transmitter/module and turning on the transmitter. The system should connect in less than 15 seconds. The receiver is now programmed for preset fail-safe. Note : Fail-safe positions are stored via the stick and switch positions on the transmitter during binding.



## Standard Range Testing

Before each flying session, and especially with a new model, it’s important to perform a range check. The X9303 2.4 incorporates a range testing system which, when the bind button on the transmitter is pressed and held, reduces the output power, allowing a range check.
Range Testing the X9303 2.4

1SFTTBOEIPMEUIFCJOECVUUPO QBDFT	GFFU 1. With the model resting on the ground, stand 30 paces (approx. 90 feet) away from the model. 2. Face the model with the transmitter in your normal flying position and depress and hold the bind button on the back of the transmitter. This causes reduced power output from the transmitter.
3. You should have total control of the model with the button depressed at 30 paces (90 feet). 4. If control issues exist, call the JR Service Center at 1-877-504-0233 for further assistance. 

### Programming Preset Fail-SafeG-22 While the above Standard Range Testing procedure is recommended for most sport aircraft, for sophisticated aircraft that contain significant amounts of conductive/ reflective materials (i.e. turbine-powered jets, some types of scale aircraft, aircraft with carbon fuselages, etc.) the following advanced range check will confirm that all internal and remote receivers are operating optimally and that the installation (position of the receivers) is optimized for the specific aircraft. This Advanced Range Check allows the RF performance of each individual internal and remote receiver to be evaluated and to optimize the locations of each individual remote receiver.
Advanced Range Testing the X9303 2.4 1. Plug a flight log (optional) into the data port in the JR R921 receiver and turn on the system (transmitter and receiver). 2. Advance the Flight Log until F- frame losses are displayed, by pressing the button on the flight log. 3. Have a helper hold your aircraft while he observes the Flight Log data. 4. Standing 30 paces away from the model, face the model with the transmitter in your normal flying position and depress and hold the bind button on the back of the transmitter. This causes reduced power output from the transmitter. 5. Have your helper position the model in various orientations (nose up, nose down, nose toward the transmitter, nose away from the transmitter, etc.) while your helper is watching the Flight Log, noting any correlation between the aircraft’s orientation and Frame Losses. Do this for 1 minute. The timer on the X9303 can be used here. For giant-scale aircraft, it’s recommended that the airplane be tipped up on its nose and rotated 360 degrees for one minute, then record the data. Next place the airplane on its wheels and do a second test, rotating the aircraft in all directions for one minute. 6. After one minute, release the bind button. A successful range check will have recorded zero frame losses. Scrolling the Flight Log through the Antenna fades (A, B, L, R) allow you to evaluate the performance of each receiver. Antenna fades should be relatively uniform. If a specific antenna is experiencing a high degree of fades, then that antenna should be moved to a different location. 7. A successful Advanced test will yield the following:

H- 0 holds

F- 0 frame losses
A, B, R, L- Antenna fades will typically be less than 100. It’s important to compare the relative antenna fades and if a particular receiver has a significantly higher antenna fades (2 to 3X), then the test should be redone, and if the same results occur, move the offending receiver to a different location. 

## Advanced Range Testing Using a Flight LogG-23 The Flight Log is compatible with JR R921 receivers. The Flight Log displays overall RF link performance as well as the individual internal and external receiver link data. Additionally it displays receiver voltage.

Using the Flight Log

After a flight and before turning off the receiver or transmitter, plug the Flight Log into the Data port on the JR R921 receiver. The screen will automatically display voltage i.e. 6v2= 6.2 volts.
Note : When the voltage reaches 4.8 volts or less, the screen will flash indicating low voltage.

Press the button to display the following information: A - Antenna fades on internal antenna A
B - Antenna fades on internal antenna B
L - Antenna fades on the left external antenna R - Antenna fades on the right external antenna
F - Frame loss
H - Holds Antenna fades—represents the loss of a bit of information on that specific antenna.
Typically it’s normal to have as many as 50 to 100 antenna fades during a flight.
If any single antenna experiences over 500 fades in a single flight, the antenna should be repositioned in the aircraft to optimize the RF link.
Frame loss—represents simultaneous antenna fades on all attached receivers. If the RF link is performing optimally, frame losses per flight should be less that 20.
A hold occurs when 45 continuous (one right after the other) frame losses occur.

This takes about one second. If a hold occurs during a flight, it’s important to re-evaluate the system, moving the antennas to different locations and/or checking to be sure the transmitter and receivers are all working correctly.
Note : A servo extension can be used to allow the Flight Log to more conveniently be plugged in without having to remove the aircraft’s hatch or canopy. On some models, the Flight Log can be plugged in, attached and left on the model using double-sided tape. This is common with helicopters, mounting the Flight Log conveniently to the side frame. 

## Flight Log—Optional for JR R921 ReceiverG-24 With all radio installations, it is vital that the onboard power system provides adequate power without interruption to the receiver even when the system is fully loaded (servos at maximum flight loads). This becomes especially critical with giant-scale models that utilize multiple high torque/ high current servos. Inadequate power systems that are unable to provide the necessary minimum voltage to the receiver during flight loads have become the number one cause of in-flight failures. Some of the power system components that affect the ability to properly deliver adequate power include: the selected receiver battery pack (number of cells, capacity, cell type, state of charge), switch harness, battery leads, regulator (if used), power bus (if used).
While the R921 receivers’ minimum operational voltage is 3.5-volts, it is highly recommended the system be tested per the guidelines below to a minimum acceptable voltage of 4.8-volts during ground testing. This will provide head room to compensate for battery discharging or if the actual flight loads are greater than the ground test loads. 

### Recommended Power System Guidelines
1. When setting up large or complex aircraft with multiple high torque servos, it’s highly recommended a current and voltmeter (Hangar 9 HAN172) be used. Plug the voltmeter in an open channel port in the receiver and with the system on, load the control surfaces (apply pressure with your hand) while monitoring the voltage at the receiver. The voltage should remain above 4.8 volts even when all servos are heavily loaded.

Note : The optional Flight Log has a built in voltmeter and it can be used to perform this test. 2. With the current meter inline with the receiver battery lead, load the control surfaces (apply pressure with your hand) while monitoring the current. The maximum continuous recommended current for a single heavy-duty servo/battery lead is three amps while short duration current spikes of up to five amps are acceptable. Consequently, if your system draws more than three amps continuous or five amps for short durations, a single battery pack with a single switch harness plugged into the receiver for power will be inadequate. It will be necessary to use multiple packs of the same capacity with multiple switches and multiple leads plugged into the receiver. 3. If using a regulator, it’s important that the above tests are done for an extended period of 5 minutes. When current passes through a regulator, heat is generated and this heat causes the regulator to increase resistance, which in turn causes even more heat to build up (thermal runaway). While a regulator may provide adequate power for a short duration, it’s important to test its ability over time as the regulator may not be able to maintain voltage at significant power levels. 4. For really large aircraft or complex models (for example 35% and larger or jets), multiple battery packs with multiple switch harnesses are necessary or, in many cases, one of the commercially available power boxes/ busses is recommended. No matter what power systems you choose, always carry out test #1 above making sure that the receiver is constantly provided with 4.8 volts or more under all conditions. 5. The latest generation of Nickel Metal Hydride batteries incorporate a new chemistry mandated to be more environmentally friendly. These batteries, when charged with peak detection fast chargers, have tendencies to false peak (not fully charge) repeatedly. These include all brands of Ni-MH batteries. If using Ni-MH packs, be especially cautious when charging making absolutely sure that the battery is fully charged. It is recommended to use a charger that can display total charge capacity. Note the number of mAh put into a discharged pack to verify it has been charged to full capacity. 

## Receiver Power System RequirementsG-25 All preprogrammed data is protected by a flash memory that guards against memory loss main transmitter battery failure. 

## Flash Memory

Battery Alarm and Display

When the transmitter voltage drops below 9.0 volts DC, the display flashes “BATT LOW” and an alarm sounds.
If you are flying when this occurs, land immediately.



## Tip on Using 2.4GHz Systems

While your DSM equipped 2.4GHz system is intuitive to operate, functioning nearly identically to 72MHz systems, following are a few common questions from customers: 1. Q: Which do I turn on first, the transmitter or the receiver? A: If the receiver is turned on first, all servos except for the throttle will be driven to their preset fail-safe positions set during binding. At this time, the throttle channel doesn’t put out a pulse position preventing the arming of electronic speed controllers or, in the case of an engine-powered aircraft, the throttle servo remains in its current position. When the transmitter is then turned on, the transmitter scans the 2.4GHz band and acquires two open channels. Then the receiver that was previously bound to the transmitter scan the band and finds the GUID (Globally Unique Identifier code) stored during binding. The system then connects and operates normally. If the transmitter is turned on first, the transmitter scans the 2.4GHz band and acquires two open channels. When the receiver is then turned on for a short period (the time it takes to connect), all servos except for the throttle are driven to their preset fail-safe positions while the throttle has no output pulse; The receiver scans the 2.4GHz band looking for the previously stored GUID; and when it locates the specific GUID code and confirms uncorrupted repeatable packet information the system connects and normal operation takes place. Typically this takes 2 to 6 seconds. 2. Q: Sometimes the system takes longer to connect and sometimes it doesn’t connect at all? A: In order for the system to connect (after the receiver is bound) the receiver must receive a large number of continuous (one after the other) uninterrupted perfect packets from the transmitter in order to connect. This process is purposely critical of the environment, ensuring that it’s safe to fly when the system does connect. If the transmitter is too close to the receiver (less that 4 feet) or if the transmitter is located near metal objects (metal transmitter case, the bed of a truck, the top of a metal work bench, etc.) connection will take longer, and in some cases, connection will not occur as the system is receiving reflected 2.4GHz energy from itself and is interpreting this and unfriendly noise. Moving the system away from metal objects or moving the transmitter away from the receiver and powering the system up again will cause a connection to occur. This only happens during the initial connection. Once connected, the system is locked-in and, should a loss of signal occur (fail-safe), the system connects immediately (4ms) when signal is regained.G-26 3. Q: I’ve heard that the DSM system is less tolerant of low voltage. Is that correct? A: All DSM receivers have an operational voltage range of 3.5 to 9 volts. With most systems, this is not a problem as most servos cease to operate at around 3.8 volts. When using multiple high current draw servos with a single or inadequate battery/power source, heavy momentary loads can cause the voltage to dip below this 3.5-volt threshold, causing the entire system (servos and receiver) to brown out. When the voltage drops below the low voltage threshold (3.5 volts), the DSM receiver must reboot (go through the start-up process of scanning the band and finding the transmitter) and this can take several seconds. Please read the receiver power requirement on page G-24 as this explains how to test for and prevent this occurrence. 4. Q: Sometimes my receiver loses its bind and won’t connect, requiring rebinding. What happens if the bind is lost in flight?
A: The receiver will never lose its bind unless it’s instructed to. It’s important to understand that during the binding process the receiver not only learns the GUID (code) of the transmitter but the transmitter learns and stores the type of receiver that it’s bound to. If the bind button on the transmitter is pressed at any time and the transmitter is turned on, the transmitter looks for the binding protocol signal from a receiver. If no signal is present, the transmitter no longer has the correct information to connect to a specific receiver and in essence the transmitter has been “unbound” from the receiver. We’ve had several customers that use transmitter stands or trays that unknowingly depress the bind button and the system is then turned on, losing the necessary information to allow the connection to take place. We’ve also had customers that didn’t fully understand the range test process and pushed the bind button before turning on the transmitter, also causing the system to “lose its bind.” If, when turning on, the system fails to connect, one of the following has occurred:

• The wrong model has been selected in the model

memory (Model Match).
• The transmitter is near conductive material

(transmitter case, truck bed, etc.) and the reflected 2.4GHz energy is preventing the system from connecting (see #2 above). • The bind button was unknowingly (or knowingly)

depressed and the transmitter was turned on previously, causing the transmitter to no longer recognize the receiver. 5. Q: Can I use a 3-cell Li-Po pack in my transmitter A: No. All current JR and Spektrum transmitters are designed to operate using a 9.6-volt transmitter pack. A fully charged 3-cell Li-Po pack puts out 12.6 volts. This higher voltage can overload the power-regulating transistor causing damage and or failure, possibly in flight. Many of our customers have experienced failures using 3-cell Li-Po packs and their use in JR and Spektrum transmitters is highly advised against. The X9303 2.4 system will operate for over 15 hours using a 2700mAh Ni-MH battery. 6. Q: How important is it that I test my system using a flight log? A: For most sport airplanes and helicopters, the use of the flight log is unnecessary. For sophisticated aircraft, especially those that have significant conductive materials within the airframe (i.e. jets, scale airplanes, etc.), the Flight Log offers an extra measure of confidence that all radio components are working optimally. The Flight Log is an important tool that allows the confirmation that the installation (position of the internal and remote receivers relative to the conductive materials in the aircraft) is optimized and that the RF (radio) link is operating at the highest levels of performance. 

## Tip on Using 2.4GHz Systems (continued)A-1 

## AIRPLANE – ACRO MODE
The ACRO mode of the X9303 2.4 system is intended for powered fixed-wing aircraft. It contains a host of advanced features that are easy to set up and use, and are designed to assist the pilot in realizing the full potential of the aircraft. These features include:
• Switch Assignments • Flight Modes (3) • Dual Rates/Exponential (2 or 3 sets for Aileron,

Elevator and Rudder) • Wing Type (Normal, Flaperon, Delta)
• Aileron Differential
• V-Tail • Dual Channels for All Primary Flight Controls

and Flaps • Dual Throttles (With Independent Trims and

Throttle Curves) • Adjustable Trim Rates (10–100 Trim Steps) • Elevator-to-Flap Mixing • Aileron-to-Rudder Mixing • Throttle Curves (2) • Flap System (With Elevator Trim, Auto Land,

Elevator/Flap Delay) • Snap Roll System (4 Directions/Rates Assigned to

Flight Modes) • Gyro System (In-Flight Gain Selection of 3 Gains

for up to 2 Gyros) • Servo Speed (Independent in Both Directions

– Eliminates Door Sequencers) • 6 Programmable Mixers (Includes 2 Multi-Point

Mixers) • Fail-Safe (Hold or Predetermined Positions) • Trainer System (Selectable Channels for Student

Control) • Timers (Stopwatch, Countdown, Integrated) • Servo Monitor (Automatically Renames Channels

According to Assignments)
In addition to the numerous features listed above, the X9303 2.4 provides the ability to combine these features during flight, using a single Flight Mode switch. This capability dramatically reduces the pilot’s work load, allowing the pilot to concentrate on flying the aircraft instead of worrying about how to operate the transmitter. 

## Flight Modes

The X9303 2.4 provides the ability to combine many of the above functions during flight, using a single Flight Mode switch. This capability dramatically reduces the pilot’s work load, allowing the pilot to concentrate on flying the aircraft instead of worrying about specific switch positions.


## ACRO PROGRAMMING - PLEASE READ

The X9303 2.4 menus and functions are presented in the recommended order that they should be addressed when setting up a new aircraft. Programming begins with entering the SYSTEM Menu, selecting a model, activating the ACRO mode, then progresses through the remainder of the SYSTEM Menu options, and then through the individual function mode programs. The descriptions are general in nature and provide the necessary information to identify the purpose of a function, allowing you to decide whether the function is appropriate for your application. Also included is specific information on making programming adjustments.



## ACRO - GETTING STARTED – SYSTEM MENU BASICS

Programming a new model begins by accessing the SYSTEM Menu. This is where models are selected, the mode is identified and where other high-level information is programmed about the model. It is also used to activate some of the more advanced programming features such as Flight Modes, Switch Assignments, Wing Type and Dual Control information.

### ACCESS THE SYSTEM MENU

A-2 The first thing to do when setting up a new model is to select the desired model memory. Generally an unused model memory is selected, however, memory that already contains data for another model may be used, as long as data for that model is no longer required because any data in that memory will be lost. 1. In the SYSTEM Menu, highlight and select Model SEL using the Selector. The currently selected model number is displayed. If a different model is to be selected, highlight and select the displayed model and a list of models will appear. Scroll up and down the list using the Selector. 2. Use the Selector to highlight and select the desired model memory.
3. Return to the SYSTEM Menu by pressing the LIST button. 1. The System menu [SYSTEM M.] is obtained by holding down the ENT button while turning the transmitter on.



### SELECT A MODEL MEMORY INFO-DISP Model SEL MDL Name Type SEL MDL Reset TRANSFER TRIM STEP Devic. SEL Wing TYPE [SYSTEM M.]

Select MODEL 2 ACRO [Model SEL]

Select 1 GLID MODEL 2 MODEL 2 ACRO 3 ACRO 4 GLID [Model SEL]

### RESET THE MODEL

A-3 When setting up a new model it is important to reset all parameters to their default or factory settings before proceeding with any other programming. This is to ensure that there are no program mixes, trims or other functions left over from a previous model or programming session. 1. In the SYSTEM Menu , highlight and select MDL Reset using the Selector

. 2. Press the CLR button that is next to RES on the display.
3. Press the lowermost button next to YES on the display to reset all data for this model. 4. Return to the SYSTEM Menu by pressing the LIST button.

[MDL Reset]

LST

RES MODEL 2 ACRO

[MDL Reset]

LST

YES NO MODEL 2 ACRO

Are you sure? Y/N

### TO ACTIVATE THE ACRO MODE

ENTER A NAME FOR THE MODEL

A-4 After selecting and resetting a model memory, it is necessary to program the transmitter to ACRO. 1. In the SYSTEM Menu , highlight and select Type SEL using the Selector

. 2. Highlight and select ACRO using the Selector

. 3. Return to the SYSTEM Menu by pressing the LIST button.

Each model should be named allowing for easy identification in the model memory list and on the main display screen. The model name appears in the upper right-hand corner of the main screen when the transmitter is switched on.

1. In the SYSTEM Menu , highlight and select MDL Name using the Selector

. 2. The cursor (the triangle that indicates where the next character will be placed), is positioned at the beginning of the model name. Press the Selector to obtain a list of available characters. 3. Highlight and select the desired character to create the model name. After a character is selected, rotate the Selector to position the cursor where the next character is to be placed and press the Selector to obtain the character list again. Repeat until the model name is completed. 4. Return to the SYSTEM Menu by pressing the LIST button. [Type SEL] MODEL 2 ACRO

GLID ACRO HELI

MODEL 3 ACRO <H9 EXTRA> [MDL Name]

!"#$%'()*+,-./01234567 89;:<=>?@ A BCDFGHIJKLMNO PQRSTUVWXYZ[ ] ^_` abcdefg hijklmnopqrstuvwxyz{|}~A-5 Device SEL and Wing Type are two powerful functions in the SYSTEM Menu that control some of the more advanced features of the X9303 2.4 system. The Device SEL function is used to activate/inhibit Flight Modes; change switch assignments; activate/inhibit switches/ channels; and to activate the FLAP TRIM lever that is next to the FLAP switch on the transmitter. The Wing Type function is used to indicate the wing type (Normal, Flaperon, Delta); to program the aircrafts tail configuration; and to identify any dual channels for primary flight controls (ELEV, AILE, RUDD, FLAP). Wing Type also provides for a 2nd throttle channel, complete with independent trim and throttle curves to accommodate twin-engine aircraft. 

## ACRO - SYSTEM MENU - ADVANCED FUNCTIONS

### FLIGHT MODES

A-6 landing speeds and again have a lot of Exponential on the rudder to prevent over-steering upon the landing/roll out. A couple of program mixes can be set up to bring in some Up-Elevator to make the jet assume a positive angle of attack, and to deploy the speed brakes. The two mixers can then be assigned only to the 3rd Flight Mode for landings. The Landing flap position can also be associated with the 3rd or Landing Flight Mode and the Gyro gain can again be turned-on to assist in a straight roll-out during landing.

Many of the functions found in the X9303 2.4 system are switch selectable (including programmable mixers) and can be assigned to one or more Flight Modes. This provides the ability to have 3 completely different aircraft configurations that are selectable in flight using a single switch.

Three Flight Modes are available in the X9303 2.4 system. When Flight Modes are activated, they are selected during flight by using one of the two 3-position switches (FLAP Switch or AUX2 switch). The pilot decides which switch is to be used when Flight Modes are activated in the Devic. SEL function in the System menu . Once Flight Modes are activated, the pilot has a choice of using the Flight Mode switch to select up to 3 Dual Rates and Exponential settings for each of the primary controls (ELEV, AILE, RUDD), or Dual Rates and Exponential settings may continue to be controlled by the 3 individual Dual Rate switches. However, when using the standard D/R switches, there are only 2 settings possible for each of the primary controls because the D/R switches are only 2-position switches. All other functions that can be activated by a switch can be assigned to 1 or more Flight Modes when Flight Modes have been activated.

Decide if Flight Modes are to be activated . If 3 sets of Dual Rates and Exponential settings are desired for Elevator, Ailerons, and Rudder instead of having only 2 sets available, then continue below to activate Flight Modes.

If there is a desire to gang Dual Rates for Aileron, Elevator and Rudder together on a single switch, then continue below to activate Flight Modes.

If there is a need to group multiple functions together in order to perform certain tasks with the aircraft, then continue below to activate Flight Modes. If it is decided that Flight Modes are not to be activated, then skip to SWITCH ASSIGNMENTS below. A Flight Mode represents an aircraft configuration (Dual Rate/Expo, programmed mixes, Aileron Differential, Flap System, Gyro System, etc.) that is designed and optimized to assist the pilot and the aircraft in performing a specific type of maneuver.

The objective of programming Flight Modes is to provide the ability to flip a switch to select a collection of settings that are optimized to perform a maneuver. An aerobatic aircraft, for example, may be set up such that the Flight Mode switch in its 1st position configures the aircraft for normal precision flying; positioning the switch in its 2nd position sets the aircraft up for snap rolls; and positioning the switch in its 3rd position sets the aircraft up for consecutive rolls, slow rolls, and rolling circles. The 3 Flight Modes could just as easily represent aircraftsettings for Take Off, Flying, and Landing for a turbinepowered jet aircraft. The point being that Flight Modes can make the pilot’s job easier by configuring the aircraft to do different things by flipping a single switch.

For example, let’s consider a jet aircraft and how Flight Modes might be used to make the pilot’s job easier. The jet will utilize 3 Flight Modes - 1 for takeoffs, 1 for flying at high speed and 1 for landing.

During takeoff, full control deflections are desired, with a moderate amount of Exponential to assist in rotation and control of the aircraft at takeoff speed. Steering should have a lot of Exponential to avoid over-steering during the takeoff roll. So for the 1st Flight Mode (FM0), Dual Rates and Exponential curves are set for Ailerons and Elevator to allow adequate control for rotation and control at takeoff speed, while a high percentage of Exponential is set for the rudder/steering to help prevent over-steering during take off. If the aircraft is equipped with 3 position Flaps (Retracted, Take-off position and Landing position), the Take-off flap position can be assigned to only the 1st Flight Mode to assist in takeoff. There may also be a Gyro attached to the steering/rudder and the Gyro gain can be turned-on and associated with the Take-Off Flight Mode to assist in keeping the aircraft straight during the takeoff roll.

For normal flight at higher speeds, the 2nd Flight Mode (FM1) would be set up to have quite a bit of Exponential and perhaps reduced control rates on all control surfaces because a lot less control deflection is required at high speeds. The retracted flap position would also be assigned to this Flight Mode and the Gyro gain could be reduced or turned-off.

For landing, the 3rd Flight Mode (FM2) would be set up to use full control throws with a moderate to high degree of Exponential to smoothly control the jet at lower

### To Activate Flight Modes

A-7 1. From SYSTEM M. highlight and select Devic. SEL using the Selector.

2. Using the Selector , highlight and select INH under FLIGHT MODE . When selected, two options appear: AUX2 SW and FLAP SW . Highlight and select the switch that is to be used to select between Flight Modes while flying. The example below shows that the FLAP switch has been selected.

Once Flight Modes have been activated, 2 new parameters appear on the display: TRIM:COM and D/R:SW. Once one of the 3-position switches is selected, Flight Mode 0 (FM0) is in effect when the switch is in the upper position, Flight Mode 1 (FM1) is in effect when the switch is in the middle position and Flight Mode 2 (FM2) is in effect when the switch is moved to the lowest position. [Devic. SEL]

FLIGHT MODE INH GEAR FLAP AUX2 AUX3 AUX4 GEAR FLAP AUX2 AUX3 RUDD SW SW SW LEV D/R

OUT: INH ACT ACT INH ACT TRIM OFF

[Devic. SEL]

FLIGHT MODE INH GEAR FLAP AUX2 AUX3 AUX4 GEAR FLAP AUX2 AUX3 RUDD SW SW SW LEV D/R

OUT: INH ACT ACT INH ACT TRIM OFF INH AUX2 SW FLAP SW

### TRIM:COM (Flight Modes)

D/R:SW (Flight Modes)

A-8 The TRIM:COM parameter can be toggled back and forth between COM and FM by pressing the Selector when COM or FM is highlighted. If left in the COM mode, the digital trims for Elevator, Ailerons, and Rudder are Common or shared by the 3 Flight Modes. If FM is selected, the X9303 2.4 keeps track of the digital trims independently for each Flight Mode, which means the pilot can re-trim the aircraft using the digital trims for each Flight Mode. This is a very useful feature if switching between Flight Modes causes the aircraft’s trim to change, such as when flaps are deployed by one of the Flight Modes causing a slight roll. In this case, the pilot can simply use the Aileron digital trim to trim the Ailerons, eliminating the roll tendency when that Flight Mode is selected. Selecting other Flight Modes brings in a corresponding set of trims, ensuring the aircraft stays in trim as the pilot changes between the 3 Flight Modes during flight. If Flight Modes are only going to be used to switch between 3 sets of Dual Rates/Exponential settings, then leave the TRIM parameter set to COM . If other functions are to be controlled by Flight Modes which may have a tendency to cause the aircraft trim to change, then select FM for the TRIM parameter. The example below shows FM selected, meaning that each Flight Mode has its own set of trims. The setting can be changed at any time by returning to this display.

Note : When trims are set to FM , be especially careful during the first flight of an aircraft to remember that the aircraft will need to be trimmed using the digital trims for Aileron, Elevator and Rudder for each Flight Mode selected during flight. If the aircraft is badly out of trim, it will probably be badly out of trim for each Flight Mode selected. If the out-of-trim condition is very severe, it might be wise to land after trimming the first Flight Mode and then note the trim settings. Switch to the other 2 Flight Modes and match the trims to these settings before flying again.

The D/R:SW parameter may be toggled between SW and FM by pressing the Selector when SW or FM is highlighted. If left in the SW mode, then the 3 Dual Rate switches will be used to select Dual Rates and Exponential settings for Elevator, Ailerons, and Rudder and there will only be 2 sets of Dual Rates/Expo settings for each control. If FM is selected, the Flight Mode switch will be used to select Dual Rates/Expo settings for all three controls at once (Elev, Aile, Rudd - D/R settings ganged together on the Flight Mode switch) and there will be 3 sets of D/R/Expo values available for each control. If individual D/R switches (3 switches) to control only 2 sets of rates and curves for Elevator, Ailerons and Rudder are desired, set this parameter to SW . If 3 sets of rates and curves that are selectable by a single Flight Mode switch are desired, then set this parameter to FM . This setting may be changed at any time by returning to this display. [Devic. SEL]

FLIGHT MODE FLAP SW GEAR FLAP AUX2 AUX3 AUX4 GEAR FLAP AUX2 AUX3 RUDD SW SW SW LEV D/R

OUT: INH ACT ACT INH ACT TRIM OFF TRIM:FM D/R: FM

### SWITCH ASSIGNMENTS

FLAP TRIM ON/OFF

A-9 The X9303 2.4 provides the ability to change the standard default switch assignments for GEAR, FLAP, AUX2, AUX3, and AUX4. The standard switch assignments may be changed in the Devic.SEL function contained in the SYSTEM Menu. To change one or more switch assignments: 1. From within the Devic.SEL function, use the Selector to highlight and select GEAR

, FLAP

, AUX2

, AUX3

, or AUX4 along the top line of the display. 2. Once a switch is selected, a list of available replacement switches is displayed. Highlight and select the desired switch with the Selector

. 3. Repeat for as many switches as desired.

1. The digital FLAP TRIM lever is located next to the FLAP switch. It may be activated or deactivated in the Devic.SEL function by using the Selector to highlight either ON or OFF and pressing the Selector to toggle between these two values. Ordinarily this switch should be turned OFF

, even if the aircraft has flaps or flaperons, because the system provides other means of controlling flaps anddisabling this switch will help prevent a serious out-oftrim condition if flaperons are used and the trim lever is accidentally moved. Do not turn this on unless there is a specific need to do so

. [Devic. SEL]

FLIGHT MODE INH GEAR FLAP AUX2 AUX3 AUX4 GEAR FLAP AUX2 AUX3 RUDD SW SW SW LEV D/R

OUT: INH ACT ACT INH ACT TRIM ON AIL D/R AUX2 SW ELE D/R FLAP SW RUD D/R GEAR SW MIX SW SNAP SW

[Devic. SEL]

FLIGHT MODE FLAP SW GEAR FLAP AUX2 AUX3 AUX4 GEAR FLAP AUX2 AUX3 RUDD SW SW SW LEV D/R

OUT: INH ACT ACT INH ACT TRIM OFF TRIM: FM D/R:FM

### ACTIVATE/INHIBIT SWITCHES

A-10 The X9303 2.4 provides the ability to inhibit or otherwise disable a number of the levers and switches on the transmitter – GEAR, FLAP, AUX2, AUX3, and AUX4. This is very useful when auxiliary channels are used as dual primary flight controls, such as using 2 channels/servos for 2 Elevator halves and/or using 2 servos/channels to operate the Rudder. In this instance, the auxiliary channels are no longer to be operated by their auxiliary switches but rather by the Elevator and Rudder sticks.

Note : If any of the channels identified above are to be used as a 2nd channel for a primary flight control (AILE, ELEV, RUDD, FLAP), then be sure to Inhibit ( INH ) the switches for the channels in this function or they will not be available to use as a second control channel. 1. If GEAR

, FLAP

, AUX2

, AUX3 , or AUX4 are to be used as a 2nd primary flight control, then inhibit the corresponding switch by highlighting either ACT

, SYS. or GYRO along the bottom line of the display and pressing the Selector until INH appears under the switches that are to be turned off. The example below shows all switches as INH or being turned off, making them all available to be used as a 2nd channel for a primary flight control.

Note : When SYS appears under FLAP, the FLAP SYSTEM function will appear in the FUNC.LIST (described later). If the aircraft is equipped with flaps, or equipped with Flaperons that are actually going to be used as flaps then SYS should be set under FLAP.

Note : When GYRO appears under AUX2 or AUX3

, the Gyro Function will appear in the FUNC.LIST (described later). If the aircraft is equipped with 1 Gyro, then GYRO should be set under AUX2 or AUX3. If it is equipped with 2 gyros, then GYRO should be present under both AUX2 and AUX3. The gain lead/plug from the Gyro(s) is plugged into the AUX2 and/or AUX3 channels.

[Devic. SEL]

FLIGHT MODE FLAP SW GEAR FLAP AUX2 AUX3 AUX4 GEAR FLAP AUX2 AUX3 RUDD SW SW SW LEV D/R

OUT: INH INH INH INH INH TRIM OFF TRIM:FM D/R:FM

### WING TYPE

A-11 The Wing Type function provides for 3 different wing types (NORMAL, FLAPERON and DELTA). NORMAL wing type is used when the Aileron channel is the only channel to be used to control ailerons, either with 1 servo, or multiple servos connected through a Y-harness to the aileron channel. It is also used when the aircraft is equipped with flaps that are separate from the ailerons. FLAPERON is typically used when Ailerons are controlled by separate servos that are on separate channels and there are no other flaps on the aircraft. DELTA is used when the Ailerons are used as both Ailerons and Elevators (Elevons) on an aircraft with a Delta wing configuration. The Wing Type function also provides for aircraft that have a V-Tail configuration where the 2 Elevators are used for both Elevator and Rudder control. It also provides for instructing the transmitter to use one or more auxiliary channels as a 2nd or dual channel for primary flight controls (AILE, ELEV, RUDD, FLAP). Finally, the Wing Type function contains the Twin Engine (Twin E.) feature, which allows for setting up a 2nd throttle channel for a second engine, complete with its own trim and throttle curves – an excellent feature for twin-engine aircraft!

This is a very important function because a large number of sport and aerobatic aircraft use 2 servos and 2 channels to operate the Ailerons, providing the opportunity to utilize Aileron Differential to make rolls more axial and to couple Flaps with Elevator for very tight looping maneuvers and 3D flying. Unless the aircraft has separate flaps, the FLAPERON wing type should be used here, as all of the mixing is accomplished automatically by the transmitter. Setting the wing type to FLAPERON also makes available the Aileron Differential and Elevator-to-Flap mixing functions in the FUNC.LIST (described later).

If the aircraft has flaps that are separate from the Ailerons, then use the NORMAL wing type and use the Dual Channel feature to enable a 2nd Aileron channel if dual Aileron channels are desired.

### WING Parameter – (Wing Type)

A-12 1. Highlight and select Wing TYPE in the SYSTEM Menu using the Selector

. 2. If only the Aileron channel is to control both Ailerons, either with a single servo or with 2 servos connected together via a “Y” harness, then leave the Wing

3. If 2 channels are to be used to control the Ailerons and the aircraft does not have separate flaps, highlight and select Wing with the Selector and then highlight and select FLAPERON as the wing type. Plug the right Aileron into the Aileron channel (Ch2) and plug the left Aileron servo into the FLAP or AUX1 channel (Ch6) of the receiver. parameter set to the default of NORMAL and plug the Aileron servo into the Aileron channel (Ch2) of the receiver. Also use NORMAL if the aircraft has flaps that are separate from the ailerons.

Note : If the Ailerons are not going to actually be used as flaps, inhibit the FLAP Switch and FLAP TRIM in the Devic.SEL function in the SYSTEM Menu . This will eliminate having a severe out-oftrim condition if the FLAP Switch or FLAP TRIM is accidentally moved. [WING TYPE] Wing: NORMAL V-Tail: INH

Dual AILE ELEV RUDD FLAP MATE INH Mate INH INH INH INH Trim - Trim - - - - AUXT - TWIN E.

[WING TYPE] Wing: FLAPERON V-Tail: INH

Dual AILE ELEV RUDD FLAP MATE INH Mate INH INH INH INH Trim - Trim - - - - AUXT - TWIN E.

### WING Parameter – (Wing Type) (continued)

A-13 4. If the aircraft is a Delta wing configuration, highlight and select Wing using the Selector and then highlight and select DELTA as the wing type. Plug the right Aileron into the Aileron channel (Ch2) and plug the left Aileron into the Elevator channel (Ch3) of the receiver. Note : To properly set the servo direction when using the delta wing setting, begin by using servo reversing on each channel as necessary to get the ailerons to move the proper direction with aileron stick movement. If then the ailerons move the incorrect direction with elevator stick movement, swap the channels that the servos are plugged into the receiver to reverse them.

[WING TYPE] Wing: DELTA V-Tail: INH

Dual AILE ELEV RUDD FLAP MATE INH Mate INH INH INH INH Trim - Trim - - - - AUXT - TWIN E.

### Dual Channels (Wing Type) V-tail (Wing Type)

A-14 1. To assign a 2nd channel to Ailerons, Elevator, Rudder or Flaps, highlight and select INH under the desired channel on the Mate line of the Wing TYPE display and a list of available channels is displayed. Note : Channels/Switches must be inhibited ( INH ) in the Devic. SEL function before they will appear in the list as an option to be used as a Dual channel. 1. If the aircraft has a V-tail configuration, highlight INH next to V-tail in the Wing TYPE function and press the Selector until ACT appears. Plug the right Elevator servo into the Elevator channel (Ch3) and plug the left Elevator servo into the Rudder channel (Ch4). Pressing the Selector toggles the parameter between ACT and INH . If the aircraft has a normal tail, make sure INH is selected and plug the Elevator and Rudder servos into the Elevator and Rudder channels (Ch3 and Ch4 respectively). Continue with Dual Channels below. Note : To properly set the servo direction when using the V-tail setting, begin by using servo reversing on each channel as necessary to get the elevators to move the proper direction with rudder stick movement. Then if the elevators move the incorrect direction with elevator stick movement, swap the channels that the servos are plugged into in the receiver to reverse them.

[WING TYPE] Wing: NORMAL V-Tail: INH

Dual AILE ELEV RUDD FLAP MATE INH Mate INH INH INH INH Trim - Trim - - - - AUXT - TWIN E.

INH GEAR AUX2 FLAP AUX3

### V-tail (Wing Type) (continued)

A-15 2. Highlight and select the channel that is to be the Mate (slave) to the control channel represented above it. Plug the 2nd control surface servo into the channel selected as the Mate. 3. If FLAP or AUX3 is selected as a Mate

, INH will appear on the Trim Line of the display directly beneath the channel just selected. This means that the corresponding digital switch ( FLAP TRIM or AUX TRIM ) located next to the FLAP and AUX2 switches can be used as additional trims. However, the additional trims do not function in the same fashion as regular trims. Instead, they trim the controls such that both channels move in the same direction – like reflexing both Ailerons or in the case of Elevator halves, the Elevators would move in opposite directions. As a result, these additional trims should remain inhibited unless there is a special need for them. If changed to ACT

, the corresponding trim switch ( FLAP or AUX3 ) will become active. If set to INH these additional trim switches are inactive. Normal trims continue to work regardless of the settings.

[WING TYPE] Wing: NORMAL V-Tail: INH

Dual AILE ELEV RUDD FLAP MATE INH Mate INH AUX3 INH INH Trim - Trim - INH - - AUXT - TWIN E.

### Twin E. (Wing Type)

A-16 If the aircraft is equipped with twin engines, the Twin Engine feature (Twin E.) may be used for a 2nd throttle channel with an optional separate digital trim. The FLAP or AUX3 channel must be selected as the Mate for the additional trim to be available. If another channel is used as the Mate, the 2nd throttle channel can be trimmed by the regular throttle trim along with the throttle channel.

Note : Channels/Switches must be inhibited (INH) in the Devic. SEL function before they will appear in the list as an option to be used as a Twin Engine channel. 1. Highlight and select INH next to Mate under Twin E. A list of available channels will appear. Select the FLAP or AUX3 channel if a separate trim is desired for the 2nd throttle channel. You can select a different channel if an additional trim is not desired. The normal throttle trim can trim both channels at the same time. Plug the Left engine throttle servo into the channel selected as the Mate. Plug the Right engine throttle servo into the throttle channel (Ch 1).

2. If the second throttle channel is to be trimmed using either the normal throttle trim lever or a separate trim lever, highlight and select INH next to Trim under Twin E. causing the setting to change to ACT

. Pressing the Selector toggles between INH and ACT . When set to ACT , the 2nd throttle servo can be trimmed with either the normal throttle trim or a separate trim if Flap or AUX3 is selected as the 2nd throttle channel. Dual AILE ELEV RUDD FLAP MATE INH Mate INH INH INH INH Trim - Trim - - - - AUXT - [WING TYPE] Wing: NORMAL V-Tail: INH TWIN E.

INH GEAR AUX2 FLAP AUX3

Dual AILE ELEV RUDD FLAP MATE AUX3 Mate INH INH INH INH Trim ACT Trim - - - - AUXT - [WING TYPE] Wing: NORMAL V-Tail: INH TWIN E.

### Twin E. (Wing Type) (continued)

A-17 3. If FLAP or AUX3 has been selected as the Mate and a separate digital trim is to be used for the 2nd throttle channel, Highlight and select INH next to AUXT

. This changes the setting to ACT , enabling the digital trim that corresponds to the selected channel. The digital trim switches are next to the FLAP and AUX2 switches on the transmitter.

Dual AILE ELEV RUDD FLAP MATE AUX3 Mate INH INH INH INH Trim ACT Trim - - - - AUXT ACT [WING TYPE] Wing: NORMAL V-Tail: INH TWIN E.

### TRIM STEP

A-18 The Trim Step function provides for adjusting the sensitivity of the X9303 2.4 trim levers and switches. It is useful during and after initial trimming of the aircraft, in order to trim the aircraft quickly at first and then to make very precise adjustments to aircraft trim. The digital trims may have a setting of 0–10 with 10 being the coarsest adjustment. When the value is set to 10, there are only 10 trim increments from center to each end. When set to 5, there are 20 trim increments from center to each end. When set to 4 there are 25 increments. When set to 3 there are 34 increments and when set to 1 there are 100 trim increments! When set to 0 the trim levers cease to function and can no longer be used to change the trim of the aircraft.

When adjusting the digital trims (AILE, ELEV, RUDD, FLAP, AUXT), the total trim travel does not change—only the number of increments (beeps) changes, which makes for finer or coarser trim movements. When adjusting the analog throttle trim, however, the total trim travel is actually reduced when set to less than 100%. Use a fairly coarse setting such as 4–6 when test flying an aircraft in order to be able to trim the aircraft quickly, and then use a finer setting such as 3–1 for final precision trimming.

1. Highlight and select TRIM STEP in the SYSTEM MENU to acquire the TRIM STEP display. 2. Highlight and select the trim that is to be changed and use the Selector to set a value of 1–10 (1 = finest, 10 = coarsest). 3. Repeat for other trims as desired. This concludes the SYSTEM Menu portion of the ACRO mode. Continue with FUNC.LIST below to complete the aircraft setup.

[TRIM STEP]

THRO 100% AILE 4 ELEV 4 RUDD 4 AUXT 4 FLAP 4

### REV.SW – SERVO REVERSING

A-19 Once the basic aircraft configuration has been defined in the SYSTEM Menu, the functions found in the Function List [FUNC.LIST] are used to complete the setup and then to adjust how the aircraft flies. The functions are presented (to the extent practical) in the order that they should be addressed when setting up a new aircraft. The descriptions are general in nature and are intended to provide enough information to decide whether or not to use a function and what types of selections and settings to make.

Press the LIST button after the transmitter is powered-up to obtain the FUNC.LIST

.

Once all servos have been plugged into their proper channels in the receiver, the first thing to check is the direction of travel of each servo. Move all sticks and switches/levers while observing each servo to determine if the servos are moving in the correct directions. Make note of those channels that are not traveling in the correct direction and use the REV.SW function to reverse the direction of travel for these channels. 1. Highlight and select REV.SW in the FUNC.LIST to obtain the servo reversing display.
2. Use the Selector to highlight and select those channels that need to be reversed. Pressing the Selector toggles the channel between Normal and Reverse. 

## ACRO – FUNCTION LIST

[REV SW.]

THR AIL ELE RUD GER FLP AX2 AX3 AX4 REV. NORM D/R & EXP REV. SW Sub Trim TRVL ADJ. ELE FLP M AIL RUD M THRO CURV FLAP SYS. Snap Roll

SRV. Speed Prog. Mix1 Prog. Mix2 Prog. Mix3 Prog. Mix4 Prog. Mix5 Prog. Mix6 Trainer TIMER MONITOR [FUNC. LIST]

### SUB TRIM

A-20 Sub Trims are intended for relatively minor adjustments to servo linkages and not for major trim adjustments to the aircraft. Using excessive Sub Trim percentages can cause a loss of available servo travel where the servo reaches its travel limit and stops moving before the control sticks are fully deflected. For more information on Sub Trims and linkage setups, please refer to the Sub Trim Usage and Mechanical Advantage article contained in the Glossary. Use Sub Trims to fine-tune the alignment of servo arms. Install servo arms on the servos so that the arms are at 90 ̊ or perpendicular to the servo case/linkage. Rotate, swap and reinstall the arms or try different arms if necessary to get them as close to 90 ̊ as possible. It is not unusual for the arms to be off just a little bit. Now use the Sub Trim function to fine-tune the servo arms that are not quite at 90 ̊ to the linkage/servo case.

1. Highlight and select Sub Trim in the FUNC.LIST to obtain the Sub Trim Display. 2. Highlight and select the channels where the servo arms are not quite at 90 ̊ to the servo cases. Once a channel is selected, rotate the Selector until the servo arm is at 90 ̊ to the servo case.

[Sub Trim]
THRO 0 GEAR 0 AILE 0 FLAP 0 ELEV 16 AUX2 0 RUDD 0 AUX3 0 AUX4 0

### TRVL ADJ. – TRAVEL ADJUST

A-21 Travel Adjust is used to adjust how far a servo travels in each direction. After the linkages have been installed and attached to the servos, adjust the amount of servo travel in each direction. For more information on Servo Travel and Mechanical Advantage, please refer to the Sub Trim Usage and Mechanical Advantage article contained in the Glossary. 1. Highlight and select TRVL ADJ. in the FUNC.LIST to obtain the Travel Adjust display.
2. Use the Selector to highlight and select each channel and adjust the travel in each direction by rotating the Selector . The direction of travel is changed by moving the stick/switch/lever back and forth.

[TRVL ADJ.]
THRO L100% R100% GEAR +100% -100% AILE L100% R100% FLAP U100% D100% ELEV D100% U100% AUX2 +100% -100% RUDD L100% R100% AUX3 +100% -100% AUX4 +100% -100%

### D/R & EXP – DUAL RATE AND EXPONENTIAL

A-22 Dual Rates and Exponential curves can be very effective in setting up an aircraft to have a particular “feel” when performing different types of maneuvers. Just flipping a switch can change the aircraft’s personality, causing it to take on traits that make certain maneuvers easier for the pilot. At times the aircraft needs to feel very crisp, such as when performing point-oriented aerobatics, and then feel softer for other maneuvers such as landing and rolling circles, and yet at other times the aircraft needsto be very crisp but without the tendency to be overcontrolled, like in performing snap rolls. Dual Rates and Exponential curves can be combined to produce these traits for most any aircraft. When programming a Dual Rate and Exponential curve, think about what kind of maneuver is to be performed and the response that is desired from the aircraft. For an in-depth description of D/R and Exponential, please refer to the Dual Rates and Exponential Curves at teh end of teh Aircraft section of this manual

1. Highlight and select D/R & EXP in the FUNC.LIST to obtain the D/R & EXP display. If Flight Modes were activated earlier in the Devic.SEL function and D/R was set to FM in the same function, there will be 3 sets of values displayed for each channel. Otherwise, there will only be 2 sets of Dual Rate and Exponential settings for each control.

2. Use the Selector to change between Aileron, Elevator and Rudder by highlighting and selecting AILE . Then use it to select and set dual rate and exponential values. If exponential has never been used before, try a low positive value like +10. After a while increase it gradually until the desired feel is obtained. Note : Use only positive (+) percentages unless there is a distinct need to do otherwise. D/R EXP 100% + 35% 100% + 35% 100% LIN 100% LIN 100% LIN 100% LIN [D/R & EXP]◊0
F.M.0

F.M.1

F.M.2 AILEOUTPUT

D/R EXP 100% + 35% 100% + 35% 77% + 35% 77% + 35% 100% LIN 100% LIN [D/R & EXP]◊1
F.M.0

F.M.1

F.M.2 AILEOUTPUT

### THRO CURV – THROTTLE CURVE

A-23 A linear throttle response can be obtained with the THRO CURV function by causing the throttle servo to move in an exponential fashion. In other words, the servo will move very little for the first 1⁄4–1⁄2 of stick movement, and then move more rapidly as the stick is advanced further.

THRO CURV can also be used to set up a special throttle response where the engine quickly comes up to a certain rpm and then advances very slowly to provide precise rpm control for a specific throttle range before continuing on to full throttle. Such a curve is useful for torque rolling, rolling circles and other maneuvers where the throttle response is to be slowed or flattened-out for a particular throttle range. If the Twin E. function has been activated for twin-engine aircraft, independent throttle curves are available for each engine to help eliminate any discrepancies in the throttle response between the two engines.

If the aircraft is equipped with an engine that has a nonlinear response, set up a throttle curve as described below.

1. Highlight and select THRO CURV in the FUNC.LIST

. Two different throttle curves may be defined and they are named or otherwise referenced by Pos0 and Pos1. 2. If there is a need to have 2 throttle curves (i.e. a regular curve and a curve for torque rolling), use the Selector to highlight SW SELECT and a list of available Flight Modes and switches appears. Select the Flight Mode(s) (FM0, FM1, or FM2) and/or switch(es) that is to select between the 2 curves. The switch will be used to select between the Pos0 curve and the Pos1 curve. Highlight and select Pos0 to toggle between the Pos0 and Pos1 , in order to display and adjust the 2 curves. [THRO CURV]◊0 Point-L Point-1 Point-2 Point-3 Point-4 Point-5 Point-H 0.0% INH INH 50.0% INH INH 100.0% Pos.0 SW SELECT
EXP OFF
IN 5 OUT 5 THRO STK INH

L 1 2 3 4 5 H

[THRO CURV] ◊0 Point-L Point-1 Point-2 Point-3 Point-4 Point-5 Point-H 0.0% INH INH 50.0% INH INH 100.0% Pos.0 SW SELECT
EXP OFF
IN 5 OUT 5 THRO STK INH

L 1 2 3 4 5 H FMO FM1 FM2 AIL GER RUD MIX
POS1 POS0

### THRO CURV – THROTTLE CURVE (continued)

A-24 3. Scroll over to OFF under EXP and select it to turn exponential ON. This will result in a smoothed throttle curve. 4. Scroll over to Point-3 and select it. Set the Point-3 value to 25%. This will yield a preliminary throttle curve that provides a good starting point for further adjustments. The remainder of the adjustments should be made with the engine running and the aircraft securely restrained so that it cannot possibly move. Note : If Twin E. has been activated for a twin engine aircraft, there will be a Pos0 and Pos1 for both the right and left engines, providing a total of 4 possible throttle curves.

5. Warm up the engine to its normal operating temperature. Move the throttle stick to full idle and slowly advance the throttle 1 click at a time. There should be a noticeable change in rpm for each movement of the stick. If while moving the stick it seems that the engine should be running faster or slower for a given throttle stick position, select the point that is closest to the vertical line (cursor) and increase the value if the engine is running too slow or decrease the value if the engine is running too fast for the stick position. Repeat as necessary until the desired response is obtained. However, instead of being named Pos0 & Pos1, they are named RTH.0, RTH.1, LTH.0, and LTH.1. They represent Right Throttle Pos0 & Pos1 and Left Throttle Pos0 & Pos1 respectively.

[THRO CURV]◊0 Point-L Point-1 Point-2 Point-3 Point-4 Point-5 Point-H 0.0% INH INH 50.0% INH INH 100.0% RTH.0 SW SELECT
EXP OFF
IN 5 OUT 5 THRO STK INH

L 1 2 3 4 5 H

RTH.O RTH.1 LTH.0 LTH.1

[THRO CURV]◊0 Point-L Point-1 Point-2 Point-3 Point-4 Point-5 Point-H 0.0% INH INH 25.0% INH INH 100.0% Pos.0 SW SELECT
EXP OFF
IN 5 OUT 5 THRO STK INH

L 1 2 3 4 5 H

### FLAP SYS. – FLAP SYSTEM

A-25 The X9303 2.4 features a three-position Flap System with Elevator compensation, programmable Delay, and an Auto Land feature. Its purpose is to allow the flaps to be deployed in two different positions in addition to the normal or fully retracted position. The Flap System is available in the FUNC.LIST only if SYS. is selected on the OUT line under FLAP in the Devic. SEL function within the SYSTEM Menu. Because deploying flaps generally causes a change in pitch (Elevator trim), the Flap System provides for setting an Elevator deflection for each flap position. This is called Elevator Compensation. There is also a programmable Delay in .1 second increments up to a maximum of 2 seconds. The Delay determines how long it takes for the Flaps and Elevator to reach their positions. The X9303 2.4 ensures that the Flaps and Elevator reach their positions at the same time resulting in smooth Flap deployment and retraction.

### AUTO LAND (Flap System)

A-26 1. If Auto Land is to be used, scroll to INH under AUTO LAND and select it with the Selector

. INH will change to ACT when selected and toggles between ACT and INH each time the Selector is pressed. The Auto Land feature, if implemented, automatically retracts the Flaps and Elevator compensation when the throttle is raised above a specified throttle position. This can be useful during a missed landing approach when a go-around is required. The Flap System allows the Flaps to be deployed using the Flap Switch, Flight Mode switch or a combination of both.

2. Scroll down to THRO and press the Selector to show the throttle percentage. Rotate the selector until the throttle percentage (0–100%) is equal to where the Auto Land feature is to retract the Flaps and Elevator compensation. It is recommended that the throttle position be set very high at first (between 90–99%) to give the aircraft a chance to regain some speed before the Flaps actually retract. As the Flaps retract, lift will decrease and the stall speed of the aircraft will increase and may cause a crash if the airspeed is too low. When there is a missed approach, advance the throttle slowly up to about 90% and wait until the aircraft picks up some speed before advancing the throttle to full, causing the Flaps to retract. Highlight and select FLAP SYS. in the FUNC.LIST to obtain the Flap System display if the aircraft has flaps or Flaperons that are also going to be used as flaps.

[FLAP SYS.]◊N

FLAP SW

AUTO LAND INH NORM ELEV Mid Land NORM FLAP Mid Land 0% 0% 0% U100% 0% D100% FM0: SW FM1: SW FM2: SW

Delay INH

[FLAP SYS.]◊N

FLAP SW

AUTO LAND ACT THRO 95 NORM ELEV Mid Land NORM FLAP Mid Land 0% 0% 0% U100% 0% D100% FM0: SW FM1: SW FM2: SW

Delay INH

### ELEV – ELEVATOR COMPENSATION (Flap System)

A-27 The ELEV values represent the Elevator deflection that will occur when the Flaps are deployed to their various positions. Some trial and error will probably be required to arrive at the right values, but once set, the aircraft will assume the proper pitch attitude for all flap positions.

1. Make sure the NORM value next to ELEV is set to 0% as there should be no Elevator deflection with the flaps in their fully retracted (up) position. If it is not 0%, scroll to NORM next to ELEV , select it, and then set the value to 0%. 2. Scroll to the Mid parameter beside ELEV and select it. Set the value either U (up) or D (down) to introduce up or down Elevator trim for the Mid position of the flaps. If not sure about which direction, aircraft typically pitch up when flaps are deployed, requiring some Down Elevator input to compensate. Use a small percentage like 3–5% at first and, after test flying, adjust the value a little at a time until the aircraft maintains the correct pitch attitude (typically slightly nose down) when the flaps are deployed to the Mid position.

3. Scroll to the Land parameter beside ELEV on the display and press the Selector to select it. Set the value either U (up) or D (down) to introduce a small amount (5–10%) of up or down Elevator for the Land position of the flaps, in the same fashion as setting up the Mid position above. [FLAP SYS.]◊N

FLAP SW

AUTO LAND ACT THRO 95 NORM ELEV Mid Land NORM FLAP Mid Land 0% D 10 5% 0% U100% 0% D100% FM0: SW FM1: SW FM2: SW

Delay INH

[FLAP SYS.]◊N

FLAP SW

AUTO LAND ACT THRO 95 NORM ELEV Mid Land NORM FLAP Mid Land 0% D 10 5% D 1 10% U100% 0% D100% FM0: SW FM1: SW FM2: SW

Delay INH

### FLAP – (Flap System)

A-28 The FLAP values represent how far the flaps deflect when in the NORM

, Mid , and Land positions. The NORM position represents normal flying where the flaps are fully retracted. The Mid position is typically used for short field takeoffs and the Land position is typically used for landing. Refer to the aircraft manufacturer’s specifications for recommended flap deflections. 1. Put the Flap switch in its uppermost (Normal) position (no flaps deployed). Scroll to the NORM parameter next to FLAP on the display. It should be at U100%. If it is not, select it with the Selector and set it to 100% or the value that brings the flaps up to their normal flying position (no flaps deployed) with the Flap switch in the uppermost or Normal position.

2. Put the Flap switch in the Mid position. Scroll to the Mid parameter next to FLAP on the display and select it. Dial in a Down percentage to deflect the flaps downward the desired amount. The example above, shows a value of 25% but the aircraft manufacturer’s specifications should be used to set this value to achieve the recommended partial flap deflection. 3. Put the Flap switch in the lowermost or Land position. Scroll to the Land parameter next to FLAP on the display and select it. Dial in a Down percentage to deflect the flaps downward the amount required for landing. The illustration below shows a value of 80% but the aircraft manufacturer’s specifications should be used to set this value to achieve the recommended deflection. [FLAP SYS.]◊N

FLAP SW

AUTO LAND ACT THRO 95 NORM ELEV Mid Land NORM FLAP Mid Land 0% D 11 5% D 1 10% U100% D 1 25% D100% FM0: SW FM1: SW FM2: SW

Delay INH

[FLAP SYS.]◊N

FLAP SW

AUTO LAND ACT THRO 95 NORM ELEV Mid Land NORM FLAP Mid Land 0% D 11 5% D 1 10% U100% D 1 25% D 1 80% FM0: SW FM1: SW FM2: SW

Delay INH

### FM0-FM2 (Flap System)

A-29 If Flight Modes have been activated in the Devic. SEL function of the SYSTEM Menu then FM0, FM1 and FM2 will appear along the right side of the Flap System display to represent the 3 Flight Modes. Each of the Flight Modes can be assigned one of the Flap values ( NORM

, Mid , or Land ), so when that Flight Mode is selected during flight, the Flaps deploy to that position. SW is also an option. When SW is selected for a Flight Mode, flap operation is controlled by the Flap switch when in that Flight Mode.

If Flight Modes have not been activated, skip this portion of the Flap System.

1. For each Flight Mode, highlight and select FM0-FM2 and select either a flap position ( NORM

, Mid

, Land ) that the flaps are to assume when in that Flight Mode, or select SW if the Flap switch is to control the flaps when in that Flight Mode. The example above shows that Flight Mode 0 (FM0) is set to SW which means that the Flap switch will be used to control flaps when in this Flight Mode. FM1 is set to Mid , resulting in the flaps deflecting to the Mid position when Flight Mode 1 is selected and FM2 is set to Land

, indicating that the flaps will deploy to the Land position when Flight Mode 2 is selected. [FLAP SYS.]◊N

FLAP SW

AUTO LAND ACT THRO 95 NORM ELEV Mid Land NORM FLAP Mid Land 0% D 11 5% D 1 10% U100% D 1 80% D100% FM0: SW FM1: Mid FM2:Land

Delay INH

### Delay (Flap System)

A-30 The Delay parameter determines how long it takes for the flaps and Elevator to reach their positions. The X9303 2.4 automatically times the Flaps and Elevator so that they reach their positions at the same time, resulting in very smooth Flap deployment and retraction. The Delay is adjustable in .1 second increments up to a maximum of 2 seconds. 1. Highlight and select Delay in the Flap System display using the Selector . Then use the rotary to select a delay between .1 second and 2.0 seconds.

[FLAP SYS.]◊N

FLAP SW

AUTO LAND ACT THRO 95 NORM ELEV Mid Land NORM FLAP Mid Land 0% D 11 5% D 1 10% U100% D 1 80% D100% FM0: SW FM1: Mid FM2:Land

Delay 2.0s

### ELE  

### FLP M – ELEVATOR-TO-FLAP MIXING

A-31The X9303 2.4 features a built-in mixer for Elevator-toFlap. The mixer causes the Flaps (or Flaperons) to move when the Elevator is moved, resulting in tighter looping maneuvers, or to provide some Aileron reflex for some 3D maneuvers such as Harriers. Typically, the flaps are set to travel downward with up Elevator and to travel upward with down Elevator with the exception of adding reflex for 3D maneuvers such as harriers, in which case the reverse is set up so that the flaps travel up with up elevator and down with down elevator. The direction that the flaps travel with Elevator input can be changed by using positive and negative values.

If Elevator-to-Flap mixing is desired for the aircraft, perform the steps below.

1. Highlight and select ELE  FLP M in the FUNC.LIST to obtain the Elevator-to-Flap mix display.

2. There are 2 sets of mixing values available – Pos0 or Pos1. If the Pos0 values are left at 0% then the mixer may be turned on and off – Pos0 will be OFF and Pos1 will be ON (this can be reversed by leaving the Pos1 values at zero and putting values in Pos0). Highlight and select DN next to Pos1 and set the value to give the desired amount of Flap travel in the Down direction when full Up Elevator is applied. 3. Highlight and select UP next to Pos1 and set the value to give the desired amount of Flap travel in the UP direction when full Down Elevator is applied.

4. Scroll down to the bottom line of the display to select the Flight Mode(s) and/or switch(es) that is to be used to turn the mixer on and off. The throttle may also be used to turn the mixer on and off by highlighting and selecting THRO STK and setting the percentage of throttle to the point where the mixer is to switch between on and off. Note : Pos1 always has priority over Pos0. In other words, if multiple switches are selected to turn the mixer on and off and one of the switches is in its Pos1 position, then all other switches are ignored and the Pos1 values are in effect. [ELE≥FLP M]◊0-U
Pos0: DN 0% Pos1: DN 0% Pos0: UP 0% Pos0: UP 0%

THRO STK INH FM0 FM1 FM2 AIL GER RUD MIX
POS1 POS0

[ELE≥FLP M]◊0-U
Pos0: DN 0% Pos1: DN+ 30% Pos0: UP 0% Pos0: UP+ 30%

THRO STK INH FM0 FM1 FM2 AIL GER RUD MIX
POS1 POS0

### AIL  

### RUD M – AILERON-TO-RUDDER MIXING

A-32 The X9303 2.4 features a built-in mixer for Aileron-toRudder. The mixer causes the Rudder to deflect when the Ailerons are moved resulting in coordinated turns.This is a useful function for high-wing aircraft with flatbottomed airfoils because the Ailerons are typically not very effective, and Rudder input combined with Aileron input dramatically improves the turn and bank authority for these aircraft. The Rudder normally moves in the same direction as the Ailerons, however, the Rudder can be made to move in either direction by using positive or negative values.

If the aircraft requires Aileron-to-Rudder mixing, perform the steps below.

1. Highlight and select AIL  RUD M in the FUNC.LIST to obtain the Aileron-to-Rudder mix display.

2. There are 2 sets of mixing values available – Pos0 and Pos1. If the Pos0 values are left at 0% then the mixer may be turned on and off – Pos0 would be off and Pos1 would be on (this can be reversed by leaving the Pos1 values at zero and putting values into Pos0). Highlight and select L next to Pos1 and set the value to give the desired amount of Left Rudder. A negative value will reverse the direction. 3. Highlight and select R next to Pos1 and set the value to give the desired amount of Right Rudder. A negative value will reverse the direction. 4. Scroll down to the bottom line of the display to select the Flight Mode and/or switch(es) that is to be used to turn the mixer on and off. The example below showsFlight Mode 2 set to Pos1, turning on the Aileron-toRudder mix. The throttle may also be used to turn the mixer on and off by highlighting and selecting THRO STK and setting the percentage of throttle to the point where the mixer is switched on/off.

Note : The Pos0 values can also be set to something other than zero causing a different amount of Rudder deflection to occur when there is Aileron input. One or more switches can then be selected to switch between the two sets of values. With this setup there will always be some mixing, as indicated by either Pos0 or Pos1, and the mixing cannot be turned off. Note : Pos1 always has priority over Pos0. In other words, if multiple switches are selected to turn the mixer on and off and one of the switches is in its Pos1 position, then all other switches are ignored and the Pos1 values are in effect. [AIL≥RUD M]◊0-L
Pos0: L 0% Pos1: L 0% Pos0: R 0% Pos0: R 0%
THRO STK INH FM0 FM1 FM2 AIL GER RUD MIX POS1 POS0

[AIL≥RUD M]◊0-L
Pos0: L 0% Pos1: L + 50% Pos0: R 0% Pos0: R + 50%

THRO STK INH FM0 FM1 FM2 AIL GER RUD MIX
POS1 POS0

### AIL DIFF. – AILERON DIFFERENTIAL

A-33 When Ailerons are deflected, the Aileron that deflects downward typically creates more drag than the Aileron that deflects upward. If the difference in drag is great enough, it will cause the aircraft to yaw in the direction of the down Aileron, i.e. a roll to the right will cause the aircraft to yaw to the left because the left Aileron deflects downward and creates more drag. This, of course, is an undesirable tendency that results in non-axial rolls and a loss of heading.

The X9303 2.4 provides an Aileron Differential function that allows adjustment of the Aileron that deflects downward without affecting the Aileron that travels upward and, therefore, can eliminate yaw tendencies in rolling maneuvers. It can also affect only the Aileron that travels upward—this is called negative differential and is useful if an aircraft yaws in the same direction as the Aileron input.

Aileron differential is available in the FUNC.LIST only if the FLAPERON Wing Type was selected in the Wing Type function in the SYSTEM Menu or a Dual channel has been assigned to ailerons in the Wing TYPE function.

The Aileron Differential function provides for 2 differential settings that are switch or Flight Mode selectable – Pos0 and Pos1. The 2 settings can be combined in different ways to provide one setting that is on all of the time, or one setting that is on and one that is off (0 differential), or 2 different amounts of differential—maybe one for normal flying and another for flat spins. To use the Aileron Differential function, highlight and select AIL Diff. in the FUNC.LIST to obtain the Aileron Differential display.
1. If there is to be a single Aileron differential setting that is on all of the time, highlight and select Pos0 and set a small percentage of differential. A positive value causes the downward Aileron to travel less while a negative value causes the upward Aileron to travel less (negative differential). Test fly the aircraft and return to this function to make adjustments until the yaw tendency has been eliminated. That is all that is required to set up a single differential setting that is always on.

[AIL Diff.]◊0
Pos0: + 5% Pos1: LIN

THRO STK INH FM0 FM1 FM2 AIL GER RUD MIX
POS1 POS0

### AIL DIFF. – AILERON DIFFERENTIAL (continued)

A-34 2. If there are to be 2 Aileron differential values you can select a switch to control the differential amount and set each position as desired. If one of these values is set to zero, Aileron differential can be turned off by selecting the position that has the 0 values. Highlight and select Pos0 and set a small percentage of differential or leave it set to zero (0) if the ability to turn differential off is desired. Highlight and select Pos1 and set the percentage of differential. A positive value causes the downward Aileron to travel less, while a negative value causes the upward Aileron to travel less (negative differential). The example below shows a positive percentage in Pos0 for precision flying and a negative differential for Pos1 for flat spins, which is selectable with Flight Mode 2 (FM2).

3. Scroll down to the bottom line of the display to select the Flight Mode and/or switch(es) that is to be used to switch between the Aileron Differential settings. The throttle may also be used to switch between differential settings by highlighting and selecting THRO STK and setting the percentage of throttle to the point where the values are switched. Test fly the aircraft and return to this function to make adjustments until the yaw tendency has been eliminated.

Note : Pos1 always has priority over Pos0. In other words, if multiple switches are selected and one of the switches is in its Pos1 position, then all other switches are ignored and the Pos1 values are in effect. [AIL Diff.]◊0
Pos0: + 5% Pos1: - 25%

THRO STK INH FM0 FM1 FM2 AIL GER RUD MIX
POS1 POS0

### SRV. SPEED – SERVO SPEED

A-35 The X9303 2.4 system provides the ability to adjust the speed of servos on each channel in both directions. The speed may be adjusted downward (servo slowed) from its normal speed but it cannot cause a servo to move faster than its rated specifications. Furthermore, each servo can have 2 sets of speeds in both directions that are Flight Mode or switch selectable.

The servo speed function is very useful for scale models with retractable landing gear and gear doors, since in many instances the need for gear door sequencers can be eliminated. If the gear door servos move at normal speed and the landing gear servos move at a slower speed when the gear is lowered, the gear doors will be open before the landing gear begins to come down. In the opposite direction, if the gear door servos move slowly and the landing gear servos move at normal speed, the gear can retract before the gear doors begin to close.

Note : Most mechanical retract servos are nonproportional type servos that simply move from end point to end point. These types of servos are not adjustable in the servo speed function. Servo speed can also be useful on the throttle channel. The throttle servo can be slowed down such that the engine will not flameout because the carburetor is opened or closed too quickly when the throttle stick is jammed from low to high and vise versa.

To adjust servo speed, highlight and select SRV. Speed in the FUNC.LIST

. 1. If there is to be a single set of servo speeds that are in effect all of the time, make sure the display is showing Pos0 . If it is not, select Pos1 and change it to Pos0

. Highlight and select the channel and direction for each servo that is to be adjusted. Once a direction for a servo is selected, the servo speed may be set so the servo travels from .176 seconds for 60 degrees of rotation all the way up to 15 seconds for 60 degrees of rotation. Adjust the speed of each servo until the desired speed is obtained. The example below shows the throttle servo slowed down so that it traverses 60 degrees in 1.25 seconds in both directions. That is all that is required when there is only 1 set of servos speeds.

2. If there are to be 2 sets of servo speeds that are Flight Mode or switch selectable you can select a switch to control the servo speed and set each position as desired.. If one set of values is set to NORM for all channels, slowing of servos can be turned off by selecting the position (Pos0 or Pos1) that has the NORM values. Highlight and select Pos0 and change it to Pos1 and then highlight and select the channel and direction for each servo that is to be adjusted. Once a direction for a servo is selected, the servo speed may be set so the servo travels from .176 seconds for 60 degrees of rotation all the way up to 15 seconds for 60 degrees of rotation. Adjust the speed of each servo until the desired speed is obtained. Highlight and select Pos0 and then highlight and select the channel and direction for each servo that is to be adjusted. Switch between Pos0 and Pos1 to view and adjust the 2 sets of values for each servo. 3. Scroll over to and select SW SELECT to identify the Flight Mode and/or switch(es) that is to be used to switch between the 2 sets of servo speeds. The throttle may also be used to switch between differential settings by highlighting and selecting THRO STK and setting the percentage of throttle to the point where the values are switched.

Note : Pos1 always has priority over Pos0. In other words, if multiple switches are selected and one of the switches is in its Pos1 position, then all other switches are ignored and the Pos1 values are in effect. [SRV.Speed]◊0

THRO STK INH THRO AILE ELEV RUDD 1.25 NORM NORM NORM 1.25 NORM NORM NORM NORM NORM NORM NORM NORM NORM NORM NORM NORM NORM GEAR FLAP AUX2 AUX3 AUX4 [sec/60 ] SW SELECT Pos0

### SNAP ROLL

A-36 The X9303 2.4 has a Snap Roll system that is comprised of a Snap Roll switch that is used in conjunction with Flight Modes to select a direction (Right/Up, Right/Down, Left/ Up, and Left/Down) and deflections for Aileron, Elevator and Rudder. Up to four directions and corresponding rates can be programmed and a Direction/Rate combination can be assigned to 1 or more of the 3 Flight Modes. Pressing the Snap Roll switch causes the aircraft to snap roll in the direction and according to the rates assigned to the Flight Mode that is currently selected.

If Flight Modes have been activated, 3 of the Snap Roll directions/rates can be assigned to them —one per Flight Mode. If Flight Modes have not been activated then only one of the directions/rates may be active and it must be set/selected in the Snap Roll function. The Snap Roll function is inhibited as a default and must be turned on in order to use it. If the Snap Roll function is to be used, highlight and select Snap Roll in the FUNC.LIST and then select INH to activate it.
1. If Flight Modes were activated in the Devic. SEL function, FM0

, FM1 , and FM2 will appear down the left hand side of the display. Select each one and assign a direction ( RIGHT-DOWN

, RIGHT-UP

, LEFT-DOWN

, LEFT-UP ) from the list for each of the 3 Flight Modes. If Flight Modes are not activated, only a single direction appears along the left-hand side of the display. Highlight and select it and pick one of the directions.

2. Scroll over to the AILE deflection of the first direction (R-D) and set it to a rather high percentage. Scroll down to the ELEV deflection for the same direction and set it to a modest value of perhaps 40% to prevent “burying” the aircraft with too much Elevator during the snap. Now scroll down to the RUDD deflection and set it to a modest value like the Elevator. 3. Repeat step 2 for the other 3 directions. [Snap Roll]

ACT

FM0:R-D FM1:R-U FM2:L-D AILE100% L-D ELEV 40% RUDD 40% AILE100% L-U ELEV 40% RUDD 40% AILE100% R-D ELEV 40% RUDD 40% AILE100% R-U ELEV 40% RUDD 40%

### GYRO SYS. – GYRO SYSTEM

GYRO CONNECTIONS (Gyro System)

A-37 The X9303 2.4 features a very sophisticated Gyro Gain Sensitivity System that allows in-flight selection of 3 gyro gains for two separate gyros. It provides for fixed gain values as well as a Stick Override Gain, where gyro gain is progressively reduced as the stick is moved further off center. Stick Override Gain is an absolute “must” for controlling gyros in aerobatic aircraft.

Note : In order for the GYRO System to appear in the FUNC.LIST , the AUX2 and/or the AUX3 channels must be set to GYRO on the OUT Line of the Devic.SEL display. If neither of these are set to GYRO , then GYRO System will not appear as a function in the FUNC.LIST

. Up to 2 gyros may be used to control two of the three primary flight controls (Elevator, Rudder, or Aileron). Typical applications involve gyros on the Rudder and/or Elevator. The FLAP and/or AUX2 switch can be used to switch between the 3 different gains for each gyro. The gyro gains can also be controlled by Flight Modes. The gains can be fixed or variable using the Stick Override Gain feature. If one set of gains for each gyro is set to zero, then the gain/gyro can essentially be switched off during flight.

Note : This function is designed to be used only with gyros that have in-flight proportional gain adjustment capability. Single and dual rate gyros that use a potentiometer to adjust the gain will not work properly with this function.

Plug the gain connector of one gyro into the AUX2 port of the receiver. Plug the gain connector of another gyro (if any) into the AUX3 of the receiver. If only one gyro is to be used, connect its gain to either AUX2 or AUX3.

Note : The OUT line at the bottom of the Devic. SEL function must be set to GYRO for AUX2 and/

or AUX3 if they are to be used to control Gyros.

### FIXED GYRO GAIN (Gyro System)

A-38 Fixed Gyro Gain does not use the Stick Override Gain feature. Whichever of the 3 gains is presently selected remains in effect and moving the control stick does not affect the gain.
1. To access the GYRO System, highlight and select GYRO SYS. in the FUNC.LIST

. AUX2 gain settings appear in the top half of the display while the AUX3 settings appear in the lower half of the display. They will appear only if AUX2 and/or AUX3 have been set to GYRO on the OUT line of the Devic.SEL function. 2. Decide on which switch to use to control gyro gain. The Flap switch and the AUX2 switch are the only 3- position switches that can be used by the Gyro System. One switch can be used to select the gain for both gyros, or each gyro can use a different switch to select the gain. Typically, one switch is used to control the gain, even when 2 gyros are used. Highlight and select AX2 SW or FLP SW next to AUX2 and AUX3 until the desired switch is displayed next to each. The example below shows the AUX2 switch selected for both gyros.

3. Each gyro has 3 possible gain settings. They are labeled 0

, 1 , and 2 next to CEN on the display, with a percentage next to each (CEN stands for gyro gain when the control stick is at center – no stick deflection). They correspond to the positions of a 3-position switch where 0 represents the switch being in the upper position; 1 represents the middle position; and 2 represents the lower position. It is recommended that the 0 position (upper switch position) for each gyro be set to zero (0%) which allows the gyro to be turned off in flight (very useful if a gyro suddenly becomes overly sensitive).
4. Use the Selector to highlight and select the number 0 position for each gyro and set the percentage to 0% if not already at a 0% value.
5. Select the number 1 gain for each gyro and set it to some moderate value. The example shows 50% gain set for both gyros.
6. Select the number 2 gain for each gyro and set it to a relatively high value. The example shows 85% gain set for both gyros. 7. If Flight Modes have not been activated, skip to the next step. If Flight Modes have been activated in the Devic. SEL function, a list of Flight Modes ( FM0

, FM1

, FM2 ) is displayed to the right of the display for each active Gyro. The default setting for each Flight Mode is S , indicating that the 3-position gyro switch will control the gyro gain when in that Flight Mode. The S can be changed to 0

, 1 , or 2 to represent the gain values associated with the positions of the 3-position switch. For example, if FM1 is set to 0 , then when in Flight Mode 1, the gain will be 0% which corresponds to the gain of the upper position of the 3-position switch. If FM1 is set to 1, the gain will be 50%, and if FM1 is set to 2, the gain will be 85% when in Flight Mode 1.

Highlight and select each FM parameter and set it to S

, 0

, 1 , or 2 to indicate if the Gyro switch will control gyro gain while in that Flight Mode, or to assign one of the gains to the flight Mode. The example above shows all Flight Modes as deferring gyro gain control to the 3-position gyro gain switch – in this case the AUX2 switch.
8. This completes the Fixed Gyro Gain setup. In the example, the AUX2 switch is being used to select the gain of both gyros at the same time. The upper position of the switch selects 0%, essentially turning the gyros off. The middle position selects 50% for both gyros and the lower position selects 85% gain for both gyros. The selected gain does not change when the sticks are moved. [GYRO SYS.]
AUX2: AX2 SW STICK INH

AUX3: AX2 SW STICK INH 0: 0 0% 1: 50% 2: 85% CEN
◊0 FM0: S FM1: S FM2: S
FM0: S FM1: S FM2: S CEN 0: 0 0% 1: 50% 2: 85% ◊0

### STICK OVERRIDE GYRO GAIN (Gyro System)

A-39 Stick Override Gyro Gain is very popular with aerobatic pilots, as it allows the pilot to instantaneously override the gyro by moving the stick. Gyro gain decreases as the stick is moved further from neutral and is typically set up so that gyro gain is reduced to zero when the stick is at full deflection. When the stick is released and allowed to center, gyro gain is instantaneously restored. In other words, the pilot assumes control of the channel by moving the stick and returns control of the channel to the gyro by releasing the stick. This helps in performing excellent hammerheads/stall turns, as the gyro is overridden by the Rudder stick in performing the pivot, but instantly dampens out any “wiggle” as soon as the pivot is completed and the Rudder stick is released. Stick Override Gyro Gain is identical to Fixed Gyro Gain in all regards except that the control stick(s) progressively reduces the presently selected gyro gain as the stick(s) is moved off of center. As mentioned before, it is typically set up so that when the stick reaches full deflection, the gyro gain is reduced to zero.
1. To access the Stick Override Gyro Gain feature, highlight and select GYRO SYS . in the FUNC.LIST

. 2. Perform all of the steps outlined for Fixed Gyro Gain above.

3. Scroll over to and select STICK for each gyro and select the stick that corresponds with the control surface being controlled by the gyro. For example, if AUX2 is controlling the gain for the Rudder gyro, select RUDD as the stick for AUX2 . If AUX3 is controlling the gyro for Elevator, select ELEV as the stick for AUX3

. 4. Once a stick has been selected, a new set of END percentages appears on the display— all with a value of 50%. These new percentages indicate the gyro gain when the stick is moved to full deflection. If set to 0%, the gain will be progressively reduced as the stick is moved off center until it reaches 0% when the stick is at full deflection. It is recommended that all END percentages be set to 0% unless there is a specific need to do otherwise. The default value of all END percentages is 50%. Use the Selector to highlight and select each END percentage and set each one to 0%. [GYRO SYS.]
AUX2: AX2 SW STICK RUDD

AUX3: AX2 SW STICK ELEV 0: 0 0% 1: 50% 2: 85% CEN
◊0 FM0: S FM1: S FM2: S
FM0: S FM1: S FM2: S CEN 0: 0 0% 1: 50% 2: 85% END 0: 0% 1: 0% 2: 0%
END 0: 0% 1: 0% 2: 0% ◊0

### PROG MIX – PROGRAMMABLE MIXERS

A-40 The X9303 2.4 System provides 4 Standard programmable mixers (PROG.MIX3 - PROG.MIX6) and 2 Multi-Point programmable mixers (PROG.MIX1 & PROG. MIX2). Programmable mixers are used whenever the pilot wants a channel to react or move as a result of providing input to another channel, or to simply cause a channel to move by moving a switch or lever. They are typically used to compensate for deficiencies in aircraft design/setup, such as eliminating pitch- and roll-coupling in knife-edge flight, and to activate special aircraft functions like smoke systems, speed brakes, bomb drops, idle-up, etc.

Multi-Point Mixing provides the ability to define a customized “curve” of travel that the Slave channel will follow as it reacts to the Master channel. It is different from Normal Mixing in the sense that Normal Mixing results in a linear movement of the Slave channel in relation to the Master. With Multi-Point Mixing there are 7 points (including end points) along the travel of the Master channel that can be adjusted to control the action of the Slave channel (more or less travel in the same/ opposite direction) providing the ability to deviate from a linear mixing action.

The channel that receives the original input from the pilot is called the Master channel, while the channel that reacts to the Master is called the Slave channel. Mixing occurs when the pilot provides an input to the Master channel by moving a stick, switch, or lever. The transmitter automatically generates an input for the Slave channel based on the pilot’s input to the Master channel and the parameters defined in the programmable mixer.

Mixes are programmable, allowing any of the 9 channels to be Master, Slave or both. Additionally there are 4 options for Master channels that begin with a “#” (pound sign), these Master channels are origin type mixes. These include #THR, #AIL, #ELE, and #RUD. Origin mixing bypasses any other mixing that might affect that channel such as throttle curves or other programming and uses the stick position only to control the mix. Also the Master channel can be assigned to one of the two digital rocker switches, levers, or button. If dual functions have been activated in the device select function, it is possible for the Slave channel to be assigned to channels such as AILV, FPRN, FROL, and RUDV, these functions allow the ailerons to be moved as flaps, flaps to be moved as ailerons, elevators to be moved as ailerons, rudders to be moved as speed brakes either both in or both out, or similar functions.

Some examples of how programmable mixers might be used include but are certainly not limited to: • Eliminate Roll-Coupling where the aircraft rolls when there is Rudder input. The mixer causes the Ailerons to move just a little bit in the opposite direction of the Rudder in order to keep the aircraft from rolling, while holding Rudder for knife-edge flight. This standard mixer would designate the Rudder as the Master and the Ailerons as the Slave.

• Eliminate Pitch-Coupling where the aircraft

pitches to the gear or canopy when holding Rudder for knife-edge flight. The mixer causes the Elevator to move a little when Rudder is applied to keep the aircraft from pitching while holding Rudder during knife-edge flight. This Multi-Point mixer would designate the Rudder as the Master and the Elevator as the slave. A Multi-Point mixer wouldbe used because pitch-coupling is typically nonlinear in nature and requires a customized curve to counteract pitching that is induced by different amounts of Rudder deflection.

• Eliminate pulling out on down lines where

the aircraft has a tendency to pull out towards the canopy when flying vertical down lines at idle. The mixer generates a bit of down Elevator when the throttle stick is pulled back to idle, making the aircraft track straight down with no input from the pilot. This mixer would designate the Throttle as the Master and the Elevator as the Slave and would be turned on and off with a switch so the down Elevator would not be generated during landing.

• Controlling a Smoke System where a switch

is used to activate the smoke system and once activated, the smoke system comes on when the throttle stick is advanced beyond a certain point. This standard mixer would designate Throttle as the Master and an Auxiliary channel as a slave and would be turned on and off by a switch.

• Idle-Up where flipping a switch causes the engine

rpm to increase a bit at idle to protect against a flameout during flying and then returning to low idle for landing. This standard mixer would designate an auxiliary channel as the Master and the Throttle channel as the Slave. It would also use a switch to turn the mixer on and off. The possibilities are endless and limited only by the imagination.

### STANDARD PROGRAMMABLE MIXER – Example: DOWN ELEVATOR AT IDLE

A-41 Perhaps the best way to describe a Programmable Mixer is by example. The example below demonstrates a program mix for an aircraft that pulls-out or pitches towards the canopy when trying to fly a vertical down line at idle. If a mix is set up to provide a couple of degrees of down Elevator when at idle, the aircraft will track straight down without input from the pilot. Once the throttle is advanced above idle, the mixer is turned off and the down Elevator is removed. The mixer can also be turned off so the down Elevator input does not occur during landing.

This mixer uses the Throttle as the Master and the Elevator as the Slave. The mix is turned on and off with the GEAR switch in combination with the position of the throttle stick – ON at idle and OFF above idle with the GEAR switch ON. When the GEAR switch is OFF, the mixer is turned off regardless of throttle setting. The Mix parameters will be selected and set in the following order: Program Mix number, Master, Slave, Switch, Travel/Direction, and Offset. This is generally a good sequence to follow when setting up Programmable Mixers.

1. Program Mix Number . Highlight and select one of the Standard Programmable Mixers ( PROG.MIX3 - PROG.MIX6 ) to obtain the first Programmable Mix display. Then press ACT next to CLR or highlight and select INH to obtain the main mix display. The example is using PROG.MIX3

. 2. Select Master . All Programmable Mixers default to Throttle as both the Master and the Slave ( THRO  THRO ). The first THRO is the Master and the 2nd THRO represents the Slave.

Highlight and select the first THRO to the left of the arrow to obtain a list of channels that can be used as the Master. Highlight and select the #THR channel as the Master, bypassing any throttle curve settings. This will cause the physical position of the throttle stick to control the mixer. 3. Select Slave . Highlight and select THRO to the right of the arrow to obtain a list of channels that can be used as the Slave. Highlight and select ELEV as the Slave.
4. Select Switch . Scroll down, highlight, and select GER as the switch to be used to turn the mixer on and off. The GER indicator should now be in the upper or Pos1 position at the bottom of the display. Any of the switches along the bottom of the display can be used and multiple switches can be used if so desired. The example is using only the Gear switch. 5. Select Switch Position . Move the Gear switch back and forth while observing the number directly to the right of the Program Mix Name in the upper left hand corner of the display. The number will change from 0 to 1 as the switch is moved back and forth. When the number is 0, the mixer is looking at the Pos0 values (not programmed yet) and when it is a 1, it is looking at the Pos1 values (also not programmed yet). Put the switch in the position that is to turn the mixer ON. Look at the number directly to the right of the Program Mix Name. If it is 0, highlight and select Pos0 on the display. If it is 1, highlight and select Pos1 on the display. The example shows Pos0 as the position to turn the mixer ON. 6. Travel and Direction . With the switch still in the ON position, move the throttle stick to the full low position and the lower value next to the selected position should be highlighted. Set the lower position parameter to a low positive value like +3%. This is the amount of deflection of the Elevator (Slave channel) that is to occur when the mixer is turned on and the throttle is reduced to idle, or just enough to see a little down elevator deflection. [PROG.Mix3]◊0

#THR≥ELEV
Offset -140 Pos0 0% 3% Pos1 0% 0%

THRO STK INH FM0 FM1 FM2 AIL GER RUD MIX
POS1 POS0 +

### STD PROGRAMMABLE MIXER – Ex: DOWN ELEV AT IDLE (continued)

A-42 The Elevator should move slightly downward when the throttle is set to idle. If the Elevator moves upward, change the +3% to a –3% to reverse the direction that the Elevator travels. The Elevator can be made to move more by increasing the percentage (more negative or more positive) and move less by decreasing the percentage. After test flying the aircraft, adjust the percentage as may be necessary. Leave the upper value of the selected position at 0% because there is to be no Elevator input above idle.
7. Offset . Highlight and select OFFSET and set the value to -140 to -160. This represents a throttle stick position that is about 2–3 clicks up from full low stick. This is also the point where the mixer causes the Elevator to deflect the +3% set in the lower position value. Above this position there is no Elevator deflection and the Elevator returns to normal. 8. Verify Operation . Highlight and select the position containing the +3% value using the Selector , move the Gear switch to the ON position, and move the throttle stick upwards from idle while observing the position values. When the stick is brought down to idle, the lower Pos0 value is highlighted indicating the down Elevator deflection (+3%). Verify that the Elevator is deflecting downward slightly. When the stick is advanced above idle, the upper value is highlighted (0%) and the Elevator returns to normal (no mixing). Now turn the Gear switch to the OFF position and note the number next to the Program Mix Name is now changed, indicating that the mixer is looking at the values in the other position. Since both of the values in this position are at 0% there is no deflection of the Elevator – the mixer is turned OFF regardless of throttle stick position. Verify that the Elevator does not move when the throttle stick is moved.

Note: To completely disable or otherwise inhibit a mixer, highlight either the Master or Slave and press the CLR button.

### MULTI-POINT MIXER – Example: ELIMINATE PITCH-COUPLING

A-43 The example below demonstrates a Multi-Point Program Mix for aircraft that pitch towards the landing gear when holding Rudder for knife-edge flight – commonly known as Pitch-Coupling. If a mix is set up to provide an appropriate amount of up Elevator for different amounts of Rudder input, the aircraft will fly straight without pitchingto the landing gear while holding Rudder during knifeedge flight.

This Multi-Point mixer uses the Rudder as the Master and the Elevator as the Slave. The mix is turned on and off with the GEAR switch. The Mix parameters will be selected and set in the following order: Program Mix number, Master, Slave, Switch, Set Points Travel/Direction, and Offset. This is generally a good sequence to follow when setting up Multi-Point Programmable Mixers.

1. Program Mix Number . Highlight and select one of the Multi-Point Programmable Mixers (PROG. MIX1 or PROG.MIX2) to obtain the first Multi-Point Programmable Mix display. Then press ACT next to CLR or highlight and select INH to obtain the main mix display. The example is using PROG.MIX1.

2. Select Master . All Programmable Mixers default to Throttle as both the Master and the Slave ( THRO  THRO ). The first THRO is the Master and the 2nd THRO represents the Slave. Highlight and select the first THRO to the left of the arrow to obtain a list of channels and select RUDD as the Master.

3. Select Slave . Highlight and select THRO to the right of the arrow to obtain a list of channels that can be used as the Slave. Highlight and select ELEV as the Slave. 4. Select Switch . Scroll over to and select SW SELECT to obtain a list of switches and then highlight and select GER as the switch to be used to turn the mixer on and off. The GER indicator should now be in the upper or ON position at the bottom of the display. Any of the switches can be used and multiple switches can be used if so desired. The example is using only the Gear switch. [PROG.Mix1] Point-0 Point-1 Point-2 Point-3 Point-4 Point-5 Point-6 - 10

- INH

- 3

- IN 0

- 3

- INH - 10 RUDD≥ELEV SW SELECT
EXP ON
IN 50 OUT 0 THRO STK INH

0 1 2 3 4 5 6

[PROG.Mix1] Point-0 Point-1 Point-2 Point-3 Point-4 Point-5 Point-6 - 10

- INH

- 3

- IN 0

- 3

- INH - 10 RUDD≥ELEV SW SELECT
EXP ON
IN 50 OUT 0 THRO STK INH

0 1 2 3 4 5 6 ON FM0 FM1 FM2 AIL GER RUD MIX
ON OFF

### MULTI-POINT MIXER – Ex: ELIMINATE PITCH-COUPLING (continued)

A-44 5. Set Points for Travel and Direction . There are 7 points along the travel of the Rudder (the line that is intersected by the vertical line that moves right and left with the Rudder stick). At each point an Elevator deflection may be defined. A point that is set to 0% represents no Elevator deflection at that point. A negative value at a point typically indicates Up Elevator movement while a positive value results in Down Elevator movement. A point set to INH takes on the value of the curve/line between the 2 adjacent points. The direction of travel may be reversed (Up Elevator vs. Down Elevator) by changing values from negative (-) to positive (+) (moving the point values above and below the 0% line). Since the aircraft pitches to the landing gear with the application of both Right and Left Rudder, the Elevator deflection will be zero at the center (Point-3) (no mixing) and the points either side of Point-3 will be negative, indicating Up Elevator movement. The more negative a point value, the more Up Elevator deflection. Set the points initially to the following values. Point-0

- 10% (At full Right Rudder the Elevator will deflect Up 10%) Point-1 INH (Takes on the value along the curve between Point-0 & Point-2) Point-2 -3% (Elevator deflects Up 3% when Rudder is moved to Point-2) Point-3 0% (no Mixing – no Elevator deflection when Rudder is at neutral) Point-4 -3% (Elevator deflects Up 3% when Rudder is moved to Point-4) Point-5 INH (Takes on the value along the curve between Point-4 & Point-6) Point-6 -10% (At full Left Rudder the Elevator will deflect Up 10%)

6. Offset . Point-3 represents the offset position and corresponds to the Rudder stick being at neutral. It is important to leave Point-3 set at 0% to make sure there is no mixing and therefore no Elevator deflection when the Rudder is at neutral.

7. Verify Operation . Turn the RX on and turn the mix on using the Gear switch. Move the Rudder stick from full right to full left. The Elevator should deflect Up when the Rudder is moved in both directions. If it moves down instead, change the percentages to (+) values instead of (-) values at each point. If the Elevator appears to be moving too much, reduce the point values (less negative). If the Elevator does not seem to move enough, then increase the point values (more negative). Now turn the Gear switch to the OFF position and verify that the Elevator does not move. While test flying the aircraft, make note of the mixing andwhether it is generating enough up-Elevator during knifeedge to stop it from pitching to the gear, or generating too much Elevator input, causing it to pitch to the canopy instead of the gear. Also note the approximate position of the Rudder stick when pitching occurs. Land the aircraft and adjust the points closest to the position of the Rudder stick when pitching occurs for more or less Elevatordeflection until the aircraft no longer pitches during knifeedge. More negative generates more Up Elevator and less negative generates less Up Elevator. Points 1 and 5 maybe activated and their value changed if necessary to finetune the mix.

Note: To completely disable or otherwise inhibit a mixer, highlight either the Master or Slave and press the CLR button. [PROG.Mix1] Point-0 Point-1 Point-2 Point-3 Point-4 Point-5 Point-6 - 10

- INH

- 3

- IN 0

- 3

- INH - 10 RUDD≥ELEV SW SELECT
EXP ON
IN 50 OUT 0 THRO STK INH

0 1 2 3 4 5 6

### TRAINER – TRAINER SYSTEM

XP9303 USED AS MASTER (INSTRUCTOR) – (Trainer System)

A-45 The X9303 2.4 contains a Trainer System that allows the instructor to transfer some or all of the primary flight control functions (Throttle, Aileron, Elevator and Rudder) to the student. It also allows for indicating if the transmitter is to be the Master (controlled by the instructor) or Slave (controlled by the student). The Snap Roll button is used to transfer control to the student when the X9303 2.4 is being used as the Master/Instructor transmitter.

All Dual rates and Exponential settings in the Master transmitter are transferred to the Slave transmitter. The Slave transmitter battery must be charged. 1. Connect the Trainer cord between the Master and Slave transmitters. Turn the power on to the Master transmitter (the Slave transmitter remains powered off and can even have the module removed). 2. Make sure the Slave transmitter is in the PPM/FM modulation mode. If the slave system is a X9303 2.4, or any other system that is Spread Spectrum only, such as other JR 2.4GHz systems or Spektrum brand systems, this does not apply. 3. Highlight and select Trainer in the FUNC.LIST to obtain the Trainer Display.

1. If the X9303 2.4 is being used as the Master transmitter (the transmitter operated by the instructor), select the channel(s) that are to be operated by the Slave transmitter (transmitter operated by the student) when the trainer switch is depressed.

When all channel selectors are in the MAST position, NORMAL appears on the display and all 4 channels are transferred to the student when the trainer switch is depressed.

If only certain channels are to be transferred to the student, highlight and select the channels that are to be transferred, moving the indicator for these channels to the SLAV position for these channels. When less than all channels are selected as SLAV

, PROGRAM T appears on the display indicating that the Trainer System has been programmed to transfer only selected channels. The X9303 2.4 is now ready to be used as the Master or instructor transmitter. Depress the Snap Roll button to transfer control to the student. Control will remain transferred until the Snap Roll button is released. [Trainer]

MASTER NORMAL T.
ch THRO AILE ELEV RUDD SLAV MAST

### X9303 2.4 USED AS SLAVE (STUDENT) – (Trainer System)

A-46 Highlight and select MASTER and the display will switch to SLAVE . A message will appear instructing to Connect DSC & POWER off. Make sure the transmitter power switch is in the Off position and the DSC cord is connected between the 2 transmitters.

The X9303 2.4 is now ready to be used as the Slave or student transmitter.

[Trainer] SLAVE Connect DSC & POWER off

### TIMER – TIMER SYSTEM

A-47 The X9303 2.4 contains a Timer System that contains two timers. One is an integrated timer that keeps track of total time that the transmitter has been on for the model and it is displayed on the Main display. The other timer can be configured as either a Countdown timer or as a Stopwatch. This timer also appears on the Main display when active and can be started, stopped and reset from the Main display. It is a good idea to use the Countdown timer as a reminder that it is time to land so as not to run out of fuel. 1. To configure the timer as a Countdown timer highlight and select Timer in the FUNC.LIST to obtain the Timer display.

Highlight and select INH under TIMER and then select DOWN-T . Use the Selector to set the countdown start time. Once the timer is set, TIM will appear on the Main display in the lower left corner. Pressing the button next to TIM on the Main display starts and stops the timer while pressing the button next to CLR resets the timer to the programmed value.

2. To Reset the Integrated Timer, highlight and select the time under INTEG-T and Push[CLR]=0:00 appears on the display. Press the CLR button to the left of the display to reset the Integrated timer. [TIMER] MODEL 2

2:03 INTEG-T TIMER

DOWN-T 10:00

[TIMER] MODEL 2

INTEG-T

2:01 Push [CLR]=0:00 TIMER

INH

### MONITOR

A-48 The Monitor function displays each channel and shows the movement of channels when sticks, levers and switches are moved. It renames channels according to special assignments to assist in identifying what is moving. For instance, when Flaperon is the wing type, the Monitor will display RAIL for right Aileron and LAIL for left Aileron instead of displaying channel 2 and channel 6. It is a handy way to determine what channels are mixed with other channels and to verify programming when the aircraft is not at hand. The Monitor function also displays the current value of all digital trims 1. To access the Monitor function, highlight and select MONITOR in the FUNC.LIST to obtain the Monitor display.

2. The default display shows the settings of all channel positions and shows MONI in the upper left hand corner of the screen. To view the Monitor display of the digital trim positions, highlight and select TRIM . View the display while moving sticks, switches and levers to see the movements of various channels. [MONITOR] MONI THRO AILE ELEV RUDD GEAR FLAP AUX2 AUX3 AUX4

### UTILITY FUNCTIONS

COPY – COPY THE CURRENTLY SELECTED MODEL TO ANOTHER MODEL MEMORY

A-49 The Copy function is part of the Model SEL function described earlier and allows the contents of the current model memory to be copied into another model memory in the same transmitter. It is not used to transfer the model to another transmitter or to a DataSafe TM unit – the TRANSFER function provides for these activities.

The Copy function is very valuable because it can provide some insurance against losing programs (aircraft setups) that may have been time-consuming to create. It is strongly recommended that the Copy function be used to make a backup copy of the model memory for safekeeping after programming for a model has been completed, tested and refined. Making a backup copy of the model memory protects against losing the original program and also allows one to experiment with the original program, knowing that the original settings can be restored by copying the backup copy back to the original model memory.
1. The model to be copied must be currently selected –

see Model SEL description at the beginning of the ACRO section. The X9303 2.4 System includes two utility functions to help with managing the settings that have been programmed into the X9303 2.4 model memories. These functions include Copy and TRANSFER, both of which are located in the SYSTEM Menu. The Copy function is actually part of the Model SEL function while the TRANSFER function has its own set of displays.

Copy [Model SEL]

MODEL 2 ACRO

MODEL 3 HELI COPY

### COPY – COPY CURRENT MODEL (continued)

A-50 2. Highlight and select Model SEL in the SYSTEM Menu . Then highlight and select Select to obtain the Copy display.

3. Verify that the top model is the model that is to be backed-up and the lower model is empty or contains a model that is no longer required. When satisfied that all is correct, press the CLR button on the left side of the display next to COPY. The entire contents of the currently selected model are copied to the lower model on the display and there is now a complete backup of the current model. The upper and lower model memory names are now the same because the two model memories are now identical in every regard. The backup copy can now be used to restore the original at any time by performing the Copy function and reversing the order of models where the backup is copied into the original (backup copy on the top line and the original model memory on the bottom line).

Note : As the X9303 2.4 has the ModelMatch feature, in order to operate the receiver on a new model number, you must first re-bind the receiver to the new model in order for it to function. The display shows the currently selected model on top with a down-arrow pointing to the lower model memory that the current model will be copied into. The data that is presently in the lower model memory will be entirely replaced by the data in the currently selected model, so be sure that the lower model memory is either empty or contains data that is no longer required. To change the lower model memory that is to receive the copy of the current model , highlight and select the lower model name and number. Then scroll to an unused model memory or a memory that contains data that is no longer required, and select it. Copy [Model SEL]

MODEL 2 ACRO

MODEL 3 HELI SPCM MODEL 1 GLID MODEL 3 HELI MODEL 4 ACRO

Copy [Model SEL]

MODEL 2 ACRO

MODEL 3 HELI COPY

### TRANSFER – TRANSFER THE MODEL TO ANOTHER TRANSMITTER OR TO DataSafe

RECEIVE A MODEL INTO THE X9303 2.4 – (Transfer function)

A-51 1. Hold the ENT button while plugging the trainer cord into the back of the transmitter to obtain the SYSTEM Menu

. Plug the other end of the trainer cord into another X9303 2.4 or XP9303 transmitter while holding the ENT button down and prepare that transmitter for Receive as described below. Or, plug the other end of the trainer cord into a DataSafe unit and prepare the DataSafe for Receive.

2. Highlight and select TRANSFER in the SYSTEM Menu to obtain the Transfer display. The TRANSFER function can be found in the SYSTEM Menu and is used to copy the contents of a model memory to another X9303 2.4, XP9303 transmitter or to a DataSafe device on a Personal Computer (PC). It is also used to receive data for a model, either from another X9303 2.4, XP9303 transmitter or from a DataSafe unit.

3. The model to be transferred must be the currently selected model. If the model to be transferred is not currently selected, see Model SEL in the SYSTEM Menu to select the model to be transferred to another X9303 2.4, XP9303 or DataSafe unit. 4. When the receiving device is ready, press the CLR button next to START on the left side of the display. The data for the currently selected model is transferred to the receiving device. [TRANSFER]

TRANSMIT MODEL 2 ACRO

Connect DSC & POWER off

[TRANSFER]

TRANSMIT MODEL 3 ACRO H9 EXTRA

Receiver stand-by? 0% START

### RECEIVE A MODEL INTO THE X9303 2.4 – (Transfer function)

A-52 1. Hold the ENT button while plugging the trainer cord into the back of the transmitter to obtain the SYSTEM Menu . Plug the other end of the trainer cord into another X9303 2.4 or XP9303 transmitter while holding the ENT button and prepare that transmitter for Transmit as described above. Or, plug the other end of the trainer cord into a DataSafe unit and prepare the DataSafe for Transmit. 2. Highlight and select TRANSFER in the SYSTEM Menu to obtain the Transfer display.

3. If RECEIVE is already displayed, continue with the next step. If TRANSMIT is displayed, highlight and select TRANSMIT , changing it to RECEIVE

. 4. Select the model memory that is to receive the data by highlighting and selecting the model name/memory number and then scrolling to and selecting the model memory that is to receive the data. Be careful to select an unused model memory or a memory that contains data for a model that is no longer needed because the data in this model memory is going to be replaced by what is transmitted and will be permanently lost. 5. Press the CLR button next to START on the left side of the display. Stand-by appears at the bottom of the display indicating that the X9303 2.4 is ready to receive data. Press start on the transmitting X9303 2.4, XP9303 or DataSafe unit to begin the data transfer to the X9303 2.4 . [TRANSFER]

RECEIVE MODEL 3 HELI MODEL 2

Connect DSC & POWER off

[TRANSFER]

RECEIVE MODEL 1 GLID MODEL 3 ACRO 4 ACRO MODEL 2

[TRANSFER]

RECEIVE

STOP MODEL 16 ACRO H9 EXTRA MODEL 16

0% Stand-by

### SUB TRIM USAGE AND MECHANICAL ADVANTAGE

MECHANICAL ADVANTAGE SUB TRIM

A-53 Sub Trims are intended for relatively minor adjustments to servo linkages and not for major trim adjustments to the aircraft. Using excessive sub trim percentages can cause a loss in servo travel in one direction, where the servo reaches its travel limit and stops moving before the control stick is fully deflected. The diagram below illustrates an ideal servo/linkage setup when the servo is at neutral (no sub trim and digital trims centered). Notice that the servo arm is positioned at 90 ̊ or perpendicular to the servo. Also note that the linkage or rod is attached at 90 ̊ to both the servo arm and the control surface horn. This setup will result in the same amount of throw in both directions (0 differential throw). If the servo cannot be mounted parallel to the linkage/rod then just make sure the servo arm is at 90 ̊ to the control rod when the servo is at neutral.

Mechanical Advantage is a very important concept when dealing with larger aircraft. It refers to the leverage that the servo can exert on the control surface. Since the control surfaces are rather large, it is important for the servo to have enough mechanical advantage or leverage to control them, regardless of the servo’s rated torque. A large amount of torque is of little value if there is not enough leverage to use it. Insufficient leverage can lead to control surface flutter (usually a catastrophic event) and blow-back, where the air flow pushes the control surface backwards resulting in mushy or no control at higher speeds.

There are two ways to increase the mechanical advantage of the servo. One is to make sure that the control horn device, whether it be a horn as shown in the illustration above or a bolt with a ball-link fastener, is long enough. The horn is the lever that the servo uses to control the surface. The longer the horn, the more leverage the servo has.

The second way to increase the mechanical advantage for the servo is to attach the linkage at the servo arm as far inward (towards the servo arm retaining screw) as possible while still providing enough throw. This takes leverage away from the control surface by providing it with a shorter lever to work against the servo. Ensure that the attach point is the same distance from the hinge line for like surfaces (two Ailerons, two Elevators and two Rudder horns). If the attach points are not the same distance from the hinge line there will be unequal throw and it will be more difficult to synchronize the surfaces for equal deflection. This is especially critical for the Rudder where two servos are attached to the same surface – unequal throw will cause the servos to fight one another causing excessive battery drain, and in severe cases may cause servo damage.

Always try to use the maximum amount of Travel (100%) that the radio provides. Don’t reduce the percentage of travel in the radio. Instead, move the linkage further away from the hinge line at the control surface and/or move the linkage inward on the servo arm or use a shorter arm. If you use high percentages of travel, you maintain resolution (fine movements of the stick result in fine positive movements of the control surface). Linkage is 90 degrees to control horn Linkage is 90 degrees to servo arm

Servo arm is 90 degrees to servo

Greater Mechanical Advantage

Greater Mechanical Advantage

### DUAL RATES AND EXPONENTIAL CURVES

A-54 Dual Rates and Exponential curves can be very effective in setting up an aircraft to “feel” the way you would like it to feel when performing different types of maneuvers. You can essentially change the aircraft’s personality just by flipping a switch, causing the aircraft to take on traits that make certain maneuvers easier for the pilot. At times you may want the aircraft to feel very crisp, such as when performing point rolls and sided-loops and then feel softer for other maneuvers, such as rolling circles and consecutive rolls, and yet other times when you would like the aircraft to be very crisp but without a the tendency to be over-controlled, like in performing snap rolls. Dual Rates and Exponential curves can be combined to produce these traits for most any aircraft. When programming a Dual Rate and Exponential curve, always think about what kind of maneuver or flying style you plan to accomplish with it.

Dual Rates (D/R) limit how far a control surface travels. Without dual rates your control surfaces deflect to their full travel – the travel that you previously established with the TRVL ADJ. function and linkage setup. When a D/R is programmed, it limits the amount of deflection that occurs when the stick is moved to its extremes. For example, if you set an Elevator D/R to 75%, the Elevator will only deflect 75% or 3/4 of its full travel; if set to 50%, it will be limited to 1⁄2 of its full travel; and so forth. A D/R setting of 100% results in full travel again, as though there were no D/R programmed at all.

An example of programming a D/R for the Ailerons would be to set up an Aileron D/R for flying consecutive rolls by setting the Aileron D/R to 25% (actual percentage will vary). At this setting, moving the Aileron stick full left or full right would result in a roll rate of about 1 roll per second. This allows you to deflect the Aileron stick all the way and just hold it there while concentrating on Elevator and Rudder inputs – flying consecutive rolls just became easier.

EXPONENTIAL (EXP) does not limit the total deflection of a servo/control surface – the surface still moves 100% of its travel. It does, however, determine how the surface reaches its full travel, or how the control surface moves relative to the stick. When Exponential is not used, the servo response is said to be linear. That is, every movement of the stick causes the same movement in the servo--if the stick moves 20%, the servo moves 20% and the control surface follows the stick throughout the entire travel range. When plotted on a graph where the X-axis (left and right) = stick movement and the Y-axis (up and down) = servo movement, the result is a straight line that is at 45 degrees. When using Exponential, a positive (+) exponential percentage causes the servo to move less when the stick is close to the neutral point, and to move more as the stick moves further from the neutral point. For instance, the stick is moved from neutral to 30% and the servo only moves from neutral to 10%. As the stick is moved further from center (from 30% to 50%), the servo moves further and faster (from 10% to 35%). The further the stick is moved away from center, the higher the rate of servo movement. The larger the positive (+) Exponential percentage, the further the stick must be moved from center before the servo rate increases, and the faster the servo rate becomes when it gets close to the end of its travel. When stick travel (left and right) versus servo travel (up and down) is plotted on a graph, the result is a “curve.” The curve stays close to the X-axis at the center (small servo movement) and moves away from the X-axis at a greater rate (more servo movement) as the stick is moved further off center.

Exponential is typically used to reduce sensitivity or otherwise dampen movements around the neutral stick position without sacrificing full servo travel. This provides the pilot with very smooth and precise control of the aircraft while allowing relatively large movements in the control stick. It becomes easier to make very smooth and precise corrections that are difficult to detect.

If negative exponential is used, it has the opposite effect. Servo travel is increased around center and slows towards the ends. Care must be taken with negative exponential, as an aircraft that is already overly sensitive may become uncontrollable with negative exponential. It can prove useful, however, when hovering a 3D type aircraft.

No Exponential

Exponential

### Setup Sheet (Aircraft)

A-55 MODEL NO

MODEL NAME

SPOI AIL1 ELEV RUDD AIL2 FLAP AUX2 AUX3

REVERSE SW

SUB TRIM

TRAVEL ADJUST

AILE ELEV RUDD

DUAL RATE/EXP 0

1 D/R

EXP

D/R

EXP %

%

%

% %

%

%

% %

%

%

%

DIFFERENTIAL % NORM REV NORM REV NORM REV NORM REV NORM REV NORM REV NORM REV NORM REV

+ %

- % L %

R % U %

D % L %

R % + %

- % + %

- % L %

R % U %

D %

PROGRAMMABLE MIX MIX1

MIX1

MIX1

MIX1

MIX1

MIX1 CHANNEL SW EXP 0 1 2 3 4 5 6

ON/OFF

+POS -POS OFFSET ON/OFF ACT

INH SNAP ROLL R-D

R-U

L-D

L-U %

%

%

% %

%

%

% %

%

%

%

TRIM OFFSET AUTO RUDD D/R ACT INH

ELEV FLAP
MIX DOWN

UP %

%

AILE RUDD
MIX RATE

SW %

% ACT INH ELEV

FLAP

SPOI

AUTO LANDING

THRO

WING TYPE NORMAL FLAPERON

DELTA ADDITIONAL

NOTESA-56

## X9303 2.4 Helicopter – Heli Mode

Heli PROGRAMMING - PLEASE READ

HELI - GETTING STARTED – SYSTEM MENU BASICS

H-1 

## INTRODUCTION

The Heli mode of the X9303 2.4 system is intended for use in model helicopters with all types of Swashplate mixing. It contains a host of advanced features that are easy to set up and use. The features have been designed to assist the pilot in realizing the full potential of the helicopter. These features include:
• Switch Assignments for Specific Channels/

Functions • Flight Modes (up to 6) • Dual Rates/Exponential (up to 3 settings each for

Aileron, Elevator and Rudder) • Swashplate Type (Normal, 120, 140, and

90 CCPM) • Adjustable Trim Rates (10 – 100 Trim Steps) • Built-In Cyclic-to-Throttle Mixing for Aileron,

Elevator, and Rudder • Governor Pre-Program Mix • Throttle Curves (up to 5) with up to 7 Points • Pitch Curves (up to 6) with up to 7 Points • Gyro System (In Flight Gain Selection of

up to 3 Gains) • 6 Programmable Mixes (Includes 2 Multi-Point and

4 Standard Mixes) • Fail-Safe (Hold or Predetermined Positions) •Trainer System (Selectable Channels for

Student Control) • Timers (Stopwatch, Count-Down, Integrated) • Servo Monitor (Automatically Renames Channels

According to Assignments)
In addition to the numerous features listed above, the X9303 2.4 provides the ability to combine, activate, and deactivate multiple features such as Dual Rates,Gyro Gain, and Governor settings, using the Flight Mode switch. This capability dramatically reduces the pilot’s workload, allowing the pilot to focus on the task of flying.

Those who are comfortable with programming are still encouraged to continue reading this part of the manual in order to acquire an understanding of the basic X9303 2.4 programming philosophy, functions, and techniques.

This section of the manual begins with entering the System Menu, selecting a model and activating the HELI Mode, and progresses through the remainder of the System Menu options and then through the individual functions. The descriptions here are general in nature and serve not only to identify the functions that are available, but why the functions are included in the HELI Mode and when a particular function should be used. Those who have some experience with computer radios will probably be able to program their helicopter as they read through this section, owing to the fact that the individual functions are generally simple in nature and the X9303 2.4 is a very intuitive system.

Getting started begins with accessing the SYSTEM Menu. This is where models are selected, the mode is identified, modulation type is indicated, and where other high-level information is stored for the model. It is also used to activate some of the more advanced programming features such as Swashplate Types and Governor Program activation.

### ACCESS THE SYSTEM MENU

Model SEL- Model Selection

H-2 The first thing to do when setting up a new model is to select the model to be used. It is best to select an unused model number, however, a model that already contains data for another model may be used so long as data for that model is no longer required. If the model type is changed before deciding the model to be used, any programming in this particular model will be lost. 1. Bring up the SYSTEM Menu by holding down the ENT button while turning the transmitter on.

1. In the SYSTEM Menu , highlight and select Model SEL using the Selector

. 2. Use the Selector to highlight and select the desired model number to be used. 3. Return to the SYSTEM Menu by pressing the LIST button. INFO-DISP Model SEL MDL Name Type SEL MDL Reset TRANSFER TRIM STEP Devic. SEL SWASH TYP [SYSTEM M.]

Select 1 GLID 2 ACRO MODEL 3 MODEL 3 HELI 4 ACRO 5 GLID [Model SEL]

### Copy – Copying the Currently Selected Model to Another Model Memory

H-3 The Copy function is part of the Model SEL function and allows the contents of the current model memory to be copied into another model memory in the same transmitter. It is not used to transfer the model to another transmitter or to a Data Safe unit – the DATA TRANSFER function provides for these activities.

The Copy function is valuable because it can provide some insurance against losing programs (helicopter setups) that may have been very time-consuming to create. It is strongly recommended that the Copy function be used to make a backup copy of the model memory for safe keeping after programming for a model has been completed, tested and refined. Making a backup copy of the model memory protects against losing the original program and also allows one to experiment with the original program, knowing that the original settings can be restored by copying the backup copy back to the original model memory.
1. The model to be copied must be currently selected – see Model SEL description at the beginning of the HELI section. 2. Highlight and select Model SEL in the SYSTEM Menu. Highlight and select Select to obtain the Copy display.

The display shows the currently selected model on top with a down arrow pointing to the lower model memory that the current model will be copied into. The data that is presently in the lower model memory will be entirely replaced by the data in the currently selected model, so be sure that the lower model is either empty or contains data that is no longer required. Copy [Model SEL]

MODEL 3 HELI

MODEL 4 HELI COPY

Copy [Model SEL]

MODEL 3 HELI

MODEL 4 HELI COPY

### Copy (continued)

H-4 3. Verify that the top model is the model that is to be backed-up and the lower model is empty or contains a model that is no longer required. When satisfied that all is well, press the CLR button on the left side of the display next to COPY. The entire contents of the currently selected model are copied to the lower model on the display and there is now a complete backup of the current model. The upper and lower model memory names are now the same because they are now identical in every regard. The backup copy can now be used to restore the original at any time by performing the Copy function and reversing the order of models where the backup is copied into the original.

Note : As the X9303 2.4 has the ModelMatch feature, in order to operate the receiver on a new model number, you must first re-bind the receiver to the new model in order for it to function. To change the lower model memory that is to receive the copy of the current model, highlight and select the lower model name and number. Then scroll to an unused model memory or a memory that contains data that is no longer required, and select it.

Copy [Model SEL]

MODEL 3 HELI

MODEL 3 HELI SPCM MODEL 2 ACRO MODEL 4 HELI MODEL 5 ACRO

### Data Reset – RESET THE MODEL

H-5 When setting up a new model it is important to reset all parameters to their default or factory settings before proceeding with any other programming. This is to ensure that there are no program mixes, trims or other surprises left over from a previous model or programming session. If you are setting up a model for the first time, you can skip this step and move to the TYPE SELECT function.

1. In the SYSTEM Menu , highlight and select MDL Reset using the Selector

. 2. Press the CLR button that is next to RES on the display. 3. Press the lowermost button next to YES on the display to reset all data for this model. 4. Return to the SYSTEM Menu by pressing the LIST button. [MDL Reset]

LST

NO

YES MODEL 3 HELI

Are you sure? Y/N

### Type Select – TO ACTIVATE THE HELI MODE

MDL Name-ENTER A NAME FOR THE MODEL

H-6 1. In the SYSTEM Menu , highlight and select Type SEL using the Selector

. 2. Highlight and select HELI using the Selector

.

Each model should be given a name to make it easy to identify in the model number list and to identify the current model on the main display screen. The model name appears in the upper right-hand corner of the main screen when the transmitter is switched on.

3. Return to the SYSTEM Menu by pressing the LIST button. 1. In the SYSTEM Menu , highlight and select MDL Name using the Selector

. 2. Highlight and select the desired characters to form the model name. After having selected and reset the desired model number to be programmed, it is time to tell the transmitter that the Heli Mode is to be used for this helicopter.

3. Return to the SYSTEM Menu by pressing the LIST button. [Type SEL] MODEL 3 HELI

GLID ACRO HELI

MODEL 3 HELI <VIBE 50> [MDL Name]

### TRANSFER A MODEL FROM THE X9303 2.4 – (Transfer function) – To Send TRANSFER – TRANSFER THE MODEL TO ANOTHER TRANSMITTER OR TO DATASAFE

H-7 1. Hold the ENT button while plugging the trainer cord into the back of the transmitter to obtain the SYSTEM Menu. Plug the other end of the trainer cord into another X9303 2.4 or XP9303 transmitter while holding the ENT button down and prepare that transmitter for Receive as described below. Or, plug the other end of the trainer cord into a DataSafe unit and prepare the DataSafe for Receive. 2. Highlight and select TRANSFER in the SYSTEM Menu to obtain the Transfer display.

3. The model to be transferred must be the currently selected model. If the model to be transferred is not currently selected, see Model SEL in the SYSTEM Menu to select the model to be transferred to another X9303 2.4, XP9303 or DataSafe unit. The TRANSFER function can be found in the SYSTEM Menu and is used to copy the contents of a model memory to another X9303 2.4, XP9303 transmitter or to a DataSafe device on a Personal Computer (PC). It is also used to receive data for a model, either from another X9303 2.4, XP9303 transmitter or from a DataSafe unit.

4. When the receiving device is ready, press the CLR button next to START on the left side of the display. The data for the currently selected model is transferred to the receiving device. [TRANSFER]

TRANSMIT MODEL 3 HELI

Connect DSC & POWER off

### TRANSFER A MODEL TO THE X9303 2.4 – (Transfer function) – To Receive

H-8 1. Hold the ENT button while plugging the trainer cord into the back of the transmitter to obtain the SYSTEM Menu. Plug the other end of the trainer cord into another X9303 2.4 or XP9303 transmitter while holding the ENT button and prepare that transmitter for Transmit as described above. Or, plug the other end of the trainer cord into a DataSafe unit and prepare the DataSafe for Transmit. 2. Highlight and select TRANSFER in the SYSTEM Menu to obtain the Transfer display.
3. If RECEIVE is already displayed, continue with the next step. If TRANSMIT is displayed, highlight and select TRANSMIT , changing it to RECEIVE

.

4. Select the model memory that is to receive the data by highlighting and selecting the model name/memory number and then scrolling to and selecting the model memory that is to receive the data. Be careful to select an unused model memory or a memory that contains data for a model that is no longer needed because the data in this model memory is going to be replaced by what is transmitted and will be permanently lost. Note : The receiving model name/memory number can not be the currently selected model. If you wish to receive a model in the currently selected model name/ memory number, go to the model select function and select a different model, then re-enter the transfer function and follow the instructions above.

5. Press the CLR button next to START on the left side of the display. Stand-by appears at the bottom of the display indicating that the X9303 2.4 is ready to receive data. Press start on the transmitting X9303 2.4, XP9303 or DataSafe unit to begin the data transfer to the X9303 2.4. [TRANSFER]

RECEIVE MODEL 4 HELI MODEL 3

Connect DSC & POWER off

### TRIM STEP

H-9 The Trim Step function provides for adjusting the sensitivity of the X9303 2.4 trim levers and switches. It is useful during and after initial trimming of the helicopter in order to trim the helicopter quickly at first, and then to make very precise adjustments to helicopter trim. The digital trims may have a setting of 0–10 with 10 being the coarsest adjustment. When the value is set to 10, there are only 10 trim increments from center to each end. When set to 5, there are 20 trim increments from center to each end. When set to 4, there are 25 increments. When set to 3, there are 34 increments, and when set to 1, there are 100 trim increments! When set to 0 the trim levers cease to function and can no longer be used to change the trim of the helicopter.

When adjusting the digital trims (AILE, ELEV, RUDD, HOVT, HOVP), the total trim travel does not change – only the number of increments (beeps) changes, which makes for finer or coarser trim movements. When adjusting the analog throttle trim, however, the total trim travel is actually reduced when set to less than 100%. Use a fairly coarse setting, such as the factory default 4, when test flying the helicopter in order to be able to trim it quickly, and then use a finer setting, such as 3–1, for final precision trimming. The exception to this would be for Rudder. Since most Gyros amplify the servo’s travel and sensitivity, a trim value of 1 or 2 for the Rudder trim usually achieves the best results.
1. Highlight and select TRIM STEP in the SYSTEM Menu to acquire the TRIM STEP display.

2. Highlight and select the trim that is to be changed and use the Selector to set a value of 1–10 (1 = finest, 10 = coarsest). 3. Repeat for other trims as desired. [TRIM STEP]

THRO 100% AILE 4 ELEV 4 RUDD 4 HOVT 4 HOVP 4

### HELI - SYSTEM MENU - ADVANCED FUNCTIONS

ADDITIONAL FLIGHT MODES 3 and 4

H-10 There are two functions in the SYSTEM Menu that control some of the more advanced features of the X9303 2.4 system. They are the Devic. SEL and Swash Type functions.

The Devic. SEL function is used to activate and deactivate 2 additional Flight Modes; change switch assignments from the system defaults; activate and deactivate switches/ channels and to activate/deactivate the Hover Throttle, and Hover Pitch levers, and to Activate/Deactivate the Governor function. The Swash Type function is used to indicate the Swashplate type (Normal (1 Servo), CCPM 180, 120, 140, and both 3 and 4 servo 90).

Each of the options in these two functions is described below to the extent necessary to determine if they should be used for the helicopter being programmed.

The X9303 2.4 is capable of offering the pilot up to 6 separate flight modes. The X9303 2.4 is factory preset to offer the pilot 4 separate Flight Modes (N, 1, 2, H). There are 2 additional flight modes, numbered 3 and 4, that can be activated through the Device Select function. If the additional flight modes are desired, please follow the activation procedure below.

To Activate 2 Additional Flight Modes (Flight Modes 3 and 4)

1. From the SYSTEM Menu highlight and select Devic. SEL by using the Rolling Selector

.

2. Highlight and select F.MOD Extra using the Rolling Selector . When selected, five options appear: AIL D/ R

, ELE D/R

, RUD D/R

, HOLD SW , and GEAR SW

. Highlight and select the switch that is to be used to access Flight Modes while flying. The example below shows that the GEAR switch has been selected.

Once Flight Modes have been activated, two additional sets of Throttle and Pitch curves numbered 3 and 4 will appear in the Function Mode. RUD TRIM:COM GEAR AUX2 AUX3 AUX4

GEAR AUX2 AUX3 FMOD SW SW LEV SW

OUT: ACT ACT ACT ACT [Devic. SEL]

F.MOD THRO Pit. EXTRA HOLD TRIM INH HOLD PitT SW LEV

RUD TRIM:COM GEAR AUX2 AUX3 AUX4

GEAR AUX2 AUX3 FMOD SW SW LEV SW

OUT: ACT ACT ACT ACT [Devic. SEL]

F.MOD THRO Pit. EXTRA HOLD TRIM INH HOLD PitT SW LEV INH RUD D/R AIL D/R HOLD SW ELE D/R GEAR SW

### RUD TRIM: COM – (Flight Mode Trim Options)

SWITCH ASSIGNMENTS

H-11 The Rud Trim function is designed to allow the pilot to choose between 1 set of trim settings for the Rudder channel only in all flight modes (COM) or a separate set of trim settings for each of the flight modes (FM). The RUD TRIM: COM parameter can be toggled back and forth between COM and FM by pressing the Rolling Selector when COM or FM is highlighted. If left in the COM mode, the digital trim for rudder is Common or shared by the 3 Flight Modes. If FM is selected, the X9303 2.4 keeps track of the digital trims independently for each Flight Mode, which means the pilot can re-trim the rudder using the digital trims for each Flight Mode.

To change one or more switch assignments:

1. From within the Devic.SEL function, use the Selector to highlight and select THRO HOLD

, PIT Trim

, GEAR

, AUX2

, AUX3 , or AUX4 along the top line of the display. 2. Once a switch is selected, a list of available replacement switches is displayed. Highlight and select the desired switch with the Selector

. The X9303 2.4 provides the ability to change the standard default switch assignments for THRO Hold, PIT Trim, GEAR, AUX2, AUX3, and AUX4. Changing the assignments may be a matter of preference or to help overcome a disability in one hand. In any event, the standard switch assignments may be changed in Devic. SEL function contained in the SYSTEM Menu.

3. Repeat for as many switches as desired. [Devic. SEL]

F.MOD THRO Pit. EXTRA HOLD TRIM INH HOLD PitT SW LEV

RUD TRIM:FM OUT: ACT ACT ACT ACT GEAR AUX2 AUX3 FMOD SW SW LEV SW GEAR AUX2 AUX3 AUX4

RUD TRIM:COM GEAR AUX2 AUX3 AUX4

GEAR AUX2 AUX3 FMOD SW SW LEV SW

OUT: ACT ACT ACT ACT [Devic. SEL]

F.MOD THRO Pit. EXTRA HOLD TRIM INH HOLD PitT SW LEV AIL D/R HOLD SW ELE D/R GEAR SW RUD D/R

### ACTIVATE/DEACTIVATE SWITCHES

GOVERNOR PROGRAM ACTIVATION

H-12 The X9303 2.4 provides the ability to disable a number of the switches on the transmitter – Pit TRIM, GEAR, AUX2, AUX3, and AUX4. This is very useful when auxiliary channels are used for special or mixing purposes. In this instance, the auxiliary channels are no longer to be operated by their auxiliary switches but rather the program mix selected or transmitter sticks. 1. If PIT TRIM, GEAR, AUX2, AUX3, or AUX4 are to be used as a 2nd primary flight control, then inhibit the corresponding switch by highlighting ACT, along the bottom line of the display and pressing the Selector until INH appears under the switches that are to be turned-off. The example below shows all switches as INH or being turned-off, making them all available to be used as a 2nd channel for a primary flight control.

The X9303 2.4 features a special Governor program that can be activated in the Device Select screen.

The Governor program is designed to be used with most currently available Governor systems, and allows for independent rpm settings for each of the active flight modes. 1. From within the Devic.SEL function use the Selector to highlight and select OUT:ACT located at the bottom of the GEAR column along the bottom line of the display.
2. Press the Selector until the word GOV appears on the display. This indicates that the Governor function has been activated. The Governor program will now be visible in the Function Mode List. [Devic. SEL]

F.MOD THRO Pit. EXTRA HOLD TRIM INH HOLD PitT SW LEV

OUT: INH INH INH INH GEAR AUX2 AUX3 AUX4

GEAR AUX2 AUX3 FMOD SW SW LEV SW

RUD TRIM:COM

[Devic. SEL]

F.MOD THRO Pit. EXTRA HOLD TRIM INH HOLD PitT SW LEV

RUD TRIM:COM GEAR AUX2 AUX3 AUX4

GEAR AUX2 AUX3 FMOD SW SW LEV SW

OUT: GOV INH INH INH

### SWASH TYP-SWASHPLATE TYPE

Accessing the Swashplate Type Function

H-13 1. While pressing the ENT key, switch the transmitter to the ON position to enter the system mode.
2. Roll the Rolling Selector until SWASH TYP is highlighted, then press the Selector to access.
3. Press the Rolling Selector again, and the screen will display the available swashplate types. Move the Selector to highlight the desired swashplate type, and then press the Selector to select. 4. Pressing the CLR key will reset the Swashplate Type to the factory default (Normal) position. 5. To exit the Swashplate Type function, roll the Rolling Selector to highlight LIST , and press. This concludes the SYSTEM Menu portion of the Heli Mode. Continue with FUNCTION LIST below to complete the Heli setup. The Swashplate Mixing function enables the X9303 2.4 system to operate many different types of swashplate control systems, including 5 different versions of CCPM. The Swashplate options are:

1 Servo Non-CCPM, standard mixing type 2 Servo/180° CCPM 3 Servo/120° CCPM (JR style, most popular) 3 Servo/140° CCPM (JR Vigor CS, JR Vibe 90) 3 Servo/90° CCPM 4 Servo/90° CCPM

[SWASH TYPE]

3servos

140 6ch 2ch

3ch

### HELI – FUNCTION LIST

D/R & EXP – DUAL RATE AND EXPONENTIAL 

## FUNCTION MODE

H-14 Once the basic helicopter configuration has been defined in the SYSTEM Menu, the functions found in the FUNCTION LIST are used to complete the setup and then to adjust how the helicopter flies and how it is controlled. The functions are presented below in the order that they appear in the Function List

. The descriptions are general in nature and are intended to provide enough information to decide whether or not to use a function, and what types of selections and settings to make.

Press the LIST button after the transmitter is powered-up to obtain the FUNCTION LIST.

Dual Rates and Exponential curves can be very effective in setting up a helicopter to have a particular “feel” when performing different types of maneuvers. Just changing D/R and EXPO values can change the helicopter’s personality, causing the helicopter to take on traits that make certain maneuvers easier for the pilot. At times we may want the helicopter to feel very crisp, such as when performing aerobatics, and then feel softer for other maneuvers such as Hovering, and yet other times when we would like the helicopter to be very crisp but without the tendency to be over-controlled, like in performing 3D maneuvers. Dual Rates and Exponential curves can be combined to produce these traits. When programming a Dual Rate and Exponential curve, think about what kind of response is desired from the helicopter.

1. Highlight and select D/R & EXP in the FUNC.LIST to obtain the D/R & EXP display. There will be 3 sets of values displayed for each channel – Aileron, Elevator and Rudder.

2. Use the Selector to change between Aileron, Elevator and Rudder. Then use it to set dual rate and exponential values. If exponential has never been used before, try a low positive value like +20. After a while, increase it gradually until the desired feel is obtained. Use only positive (+) percentages unless there is a distinct need to increase control sensitivity. D/R EXP 100% LIN 100% LIN 100% LIN 100% LIN 100% LIN 100% LIN [D/R & EXP]◊0
POS-0

POS-1

POS-2 AILE AUTO NORM:INH ST-1:INH ST-2:INH

HOLD:INH

D/R EXP 100% LIN 100% LIN 100% LIN 100% LIN 100% LIN 100% LIN [D/R & EXP]◊0
POS-0

POS-1

POS-2 AILEOUTPUT

Extended Screen

### REV.SW - SERVO REVERSING Auto Dual Rate

H-15 Once all servos have been plugged into their proper channels in the receiver, the first thing to check is the direction of travel of each servo. Move all sticks and switches/levers while observing each servo to determine if the servos are moving in the correct directions. Make note of those servos that are not traveling in the correct direction and use the REV.SW function to reverse the direction of travel for these servos. 1. Highlight and select REV.SW in the FUNC.LIST to obtain the servo reversing display.
2. Use the Selector to highlight and select those channels that need to be reversed. Pressing the Selector toggles the channel between Normal and Reverse.

Note : If any of the versions of CCPM have been selected, the 3 CCPM channels will be re-named to CH2, CH3, and CH6, etc. on the display. The Automatic Dual Rate function allows you the opportunity to change the dual rate and expo values of the elevator, aileron, and rudder by changing the flight mode or throttle hold switch positions.

This feature simplifies the operation of multiple switches during flight. To access the Auto D/R feature, simply roll the selector to the right until the D/R Expo graph is replaced by the Auto D/R Flight Mode list.

Highlight the Flight Mode to be set for Auto D/R, then press the selector to pick the desired D/R setting to be used for this flight mode. Repeat as necessary to assign D/R positions for each flight mode.

[REV SW.]

THR AIL ELE RUD GER PIT AX2 AX3 AX4 REV. NORM

[REV SW.]

THR CH2 CH3 RUD GER CH6 --- AX3 AX4 REV. NORM

### Sub Trim

H-16 Sub Trims are intended for relatively minor adjustments to servo linkages and not for major trim adjustments to the helicopter. Using excessive sub trim percentages can cause a loss in servo travel in one direction where the servo reaches its travel limit and stops moving before the control stick is fully deflected. Use Sub Trims to fine-tune the alignment of servo arms. Install servo arms on the servos so that the arms are at 90 ̊ or perpendicular to the servo case/linkage. As JR servos feature an odd number of splines on the output shaft, you can rotate and reinstall the arms to try and obtain a better position for the servo arm that will require a lesser amount of sub trim. Now use the Sub Trim function to fine-tune the servo arms that are not quite at 90 ̊ to the servo.

1. Highlight and select Sub Trim in the FUNC.LIST to obtain the Sub Trim Display.

Note : If a form of CCPM has been selected, channel naming will vary. 2. Highlight and select the channels where the servo arms are not quite at the desired position. Once a channel is selected, rotate the Selector until the servo arm is at 90 ̊ to the servo case.

[Sub Trim]
THRO 0 GEAR 0 AILE 0 PIT. 0 ELEV 0 AUX2 0 RUDD 0 AUX3 0 AUX4 0

### TRVL ADJ. – TRAVEL ADJUST

H-17 Travel Adjust is used to adjust how far a servo travels in each direction. After the linkages have been installed and attached to the servos, adjust the amount of servo travel in each direction. 1. Highlight and select TRVL ADJ. in the FUNC.LIST to obtain the Travel Adjust display.
2. Use the Selector to highlight and select each channel and adjust the travel in each direction by rotating the Selector . The direction of travel is changed by moving the stick/switch/lever back and forth.

Note : If a form of CCPM has been selected, channel naming will vary. [TRVL ADJ.]
THRO H100% L100% GEAR AILE L100% R100% PIT. ELEV D100% U100% AUX2 RUDD L100% R100% AUX3 AUX4 +100% -100% H100% L100% +100% -100% +100% -100% +100% -100%

### Swash Mix- CCPM SWASHPLATE Mixing

H-18 1) Normal (Standard Mechanical Mixing)
This form of Swashplate Mixing uses each of the three servos to move the swashplate individually for pitch, Aileron, and Elevator changes. If one servo (NORM) is selected in the System Mode (Factory Default), the Swashplate Type function will not appear on the LCD screen in this section. 2) 2-servo 180 degrees
2 servos are used to move the swashplate, and are spaced at 180 degrees apart. This is not a very common control system configuration. 3) 3-servo 120 degrees
3 servos are used to move the swashplate, and are spaced at 120 degrees apart. This is the most common form of CCPM, and is found in JR and other brands of helicopters. 4) 3-servo 140 degrees
3 servos are used to move the swashplate, and are spaced at 140 degrees apart. This is a special JR developed form of CCPM, and is found in JR Vibe helicopters. 5) 3-servo 90 degrees

3 servos are used to move the swashplate, and are spaced at 90 degrees apart. This is also not a very common control system configuration. 6) 4-servo 90 degrees

4 servos are used to move the swashplate, and are spaced at 90 degrees apart. This is a very common control system configuration, used predominantly for Scale models like Vario, Graupner, etc. This section is for those that have activated CCPM Swashplate mixing. If CCPM Mixing has not been activated, skip to Throttle Hold/ThrottleCurves)
Note : The CCPM Swashplate Mixing screen is only displayed when Swashplate types 2s 180, 3s 120, 3s 140, 3s 90 or 4s 90 are selected in the Swashplate type Selection in System Mode. The CCPM Swashplate Mixing function (Cyclic Collective Pitch Mixing) of the X9303 2.4 is designed to allow the X9303 2.4 to be used in model helicopters that utilize 2-servo (180°), 3-servo (120°), 3-servo (90°) type and 4-servo (90°) swashplate control systems.

The desired swashplate mixing type must first be selected at the Swash Type Selection in System Mode.

Variations of CCPM Mixing

2-servo (180°) Ch 2&6 Aileron Ch 3 Elevator Ch 6 Pitch

3-servo (90°) Ch 2&6 Aileron Ch 3 Elevator Ch 2,3&6 Pitch

3-servo(120°) Ch 2&6 Aileron Ch 2,3&6 Elevator Ch 2,3&6 Pitch CCPM Servo Connection/Channel Numbers 3-servo (140 ̊) Ch 2&6 Aileron Ch 2, 3&6 Elevator Ch 2,3&6 Pitch
4-servo (90 ̊) Ch 2&6 Aileron Ch 3&8 Elevator Ch 2,3,6&8 Pitch [Swash Mix]
3servos

140 o AILE 60% ELEV 60% PIT. 60%

EXP INH