January 10, 2016 

Petition for Exemption 

Rick A. Ervin 

14837 Hill Rd 

Klamath Falls, Oregon 97603 

Phone: 541-602-4550 

Email: ricker83@gmail.com 

U.S. Department of Transportation, Docket Operations 

West Building Ground Floor, Room wl2-140 

1200 New Jersey Avenue, SE., Washington, DC 20590 

I i 

I, Rick A. Ervin, hereby submit this petition for exemption under Section 333; FAA 

Modernization and Reform Act of2012, Public Law 112-95 FEB. 14, 2012, Section 333. 

I kindly request this exemption in order to operate my UA V /U AS, Immersion RC 

Xu Gong v2/Pro Quadcopter Aircraft, for the purpose of aerial data collection in order to 

provide services for profit to include aerial photography, aerial cinematography, aerial 

filming and photography for real estate, construction firms, agricultural modeling, crop 

monitoring operations, aerial mapping, special events to include but not limited to 

weddings, private or public parties/events, business advertising, promotional events, 

geological surveying, and environmental studies. 

The ability to provide these services to other local businesses and individuals in my 

community will benefit them by opening up opportunities they otherwise did not have 

before. Traditional methods of aerial photography/videography are simply not viable 

options for the average consumer as they are costly and involve greater risks to 

everyone involved; i.e. the use of larger aircraft carrying people and flammable fuel. By 

utilizing the U A V /U AS, the same results can be achieved with much safer conditions. 

Prior to each flight/operation of the UAV /UAS, I will conduct a Pre-Flight Safety 

Inspection. Only the manufacturer's authorized repair facilities/providers will perform 

any and all repairs. Flights will not take place over densely populated areas or private 

property without the owner's permission. The UAV /UAS will only be operated within 

visual line of sight and will not be flown near airports or above 400 feet AGL. The FAA 

can be confident that operations of this U A V /U AS will achieve at least the equivalent or 

greater level of safety. The UAV weighs less than 55lbs. All flights will be terminated at 

20% of remaining battery life, which can be monitored remotely, along with other live inflight data including altitude, airspeed, GPS location, and groundspeed. The speed of the 

UA V /U AS will never exceed 25 MPH at any given time during operation. All safety 

factors will be diligently and closely followed at all times. All component 

recommendations, precautions, and suggestions in the U A V /U AS instruction manual will 

be strictly followed and never deviated from. The Immersion RC XuGong v2/Pro 

manual is attached to this petition. All flights will have a crew of at least 2 people. This 

crew will consist of a spotter and a FAA certified pilot with a current private pilot's 

license who has extensive experience flying this type ofUAV/UAS to ensure complete 

control and maximum safety during all phases of operation. Safety will be the primary 

factor at all times. 

:~·; !') 

LI (j 
I have safely and successfully operated radio-controlled aircraft for over 20 years without 

any incidents. These aircraft include: large-scale gas powered airplanes, electric EDF 

jets, electric aerobatic aircraft, quadcopters, helicopters, indoor micro-size aircraft, selfdesigned scratch built aircraft, gliders, and I have recreationally operated various aircraft 

with first-person-view video systems including powerful quadcopters and fixed wing 

aircraft. Also, I have a current private pilot's license and a current class III medical 

certificate. I have safely logged over 370 hours operating as PIC without any incidents in 

multiple types of aircraft. Primarily, I fly a L-21B Supercub on a regular basis, operating 

in and out of Class D airspace while communicating with ATC. I have a very thorough 

understanding for all classes of airspace, weather, FAR's, and limitations. Aviators who 

know me, consider me to be a safe, responsible, competent, knowledgeable, and skilled 

pilot in both private aviation and radio control aviation. 

The specific sections of 14 C.F .R from which I am seeking exemption are as follows: 

14 C.F.R. Part 21; 

14 C.F.R. 45.23(b); 

14 C.F.R. 61.101(e)(4), & (5); 

14 C.F.R. 61.113(a) & (b); 

14 C.F.R. 61.133 (a); 

14 C.F.R. 61.23(a) & (c); 

14 C.F.R 91.7(a) 

14 C.F.R. 91.9(b)(2); 

14C.F.R. 91.109(a); 

14 C.F.R. 91.119; 

14 C.F.R. 91.121; 

14 C.F.R. 91.151(a); 

14 C.F.R. 91.203(a) & (b); 

14 C.F.R. 91.405(a); 

14 C.F.R. 91.407(a)(1); 

14 C.F.R. 91.409(a)(2}; 

14 C.F.R. 91.417(a) & (b). 

Please find the included user manual. 

I believe that this is a very important step towards successfully regulating the rapidly 

growing field ofUnmanned Aerial Systems in respect to safety and accountability. I truly 

thank you for your consideration. 

Respectfully Submitted, 

Rick A. Ervin 

~~ Attachments: 

Immersion RC XuGong v2/Pro Instruction Manual 
....... 

------------- ~­.. 

Instruction manual - International edition 

Rev 0. 9 -Jan 201 5 (Preliminary) 

/Living Manual' 

1 
Living Manual 

Note that this manual is lmmersionRC's first trial run of a 'living manual'. 

Instead of downloading a static PDF file, the manual is an online document which reflects 

edits, additions, and corrections as they happen. 

The Living Manual also allows readers to add their comments, which editors can use to refine 

the documentation. 

Confused by part of the build? Wishing for a better explanation of part of the build? Leave a 

note and the editors will listen. 

Overview 

The XuGong v2/Pro quadcopter is the successor to lmmersionRC's XuGong v1, the first 

commercially available foldable quadcopter. 

The addition of an integrated brushless gimbal, a comprehensive onboard electronics board, 

and a host of other new features make this a quantum leap up from the original platform, and 

the ideal FPVers quad copter to take with you on a trip or vacation. 

Key features include: 

e Compact Foldable Design 

e 2 axis brush less gimbal for Go Pro Hero 3/4 

e Lightweight frame with > 20 minute flight times 

e Built-in OSD, with multicopter enhancements 

e Single-cable link to the EzUHF Rx, with full uplink status 

e Carbon fiber frame, CNC milled aluminium arms 

e Integrated telemetry down-link. 

e USB port for future upgrades 

e Live stream from GoPro 

e Flight camera (backup camera) 

e GPS data picked off the DJI NAZA (no need of an extra GPS unit) 

2 
Package Contents, v2/Pro 

Power Distribution board, including: 

OSD 

Camera switch 

GoPro Power Supply (5.0 V) 

GPS Interface 

- Current/Voltage Sensor 

PPM in/out 

1.5mm Matte Carbon Fibre frame 

plates, 8 pieces. 

Countersunk M4 Aluminium screws 

and matching nyloc nuts. 

4 pairs. 

-----------------.. !' 

. ' 

• •• 

3 
-------------------

.,.. .. "'' 

T -Nut parts, 12 sets of: 

M3x8mm aluminium screw 

M3 nyloc nut 

Plastic retainer 

Arm Assembly, including: 

4x Outer arms, with installed 

thrust bearings. 

1 x Inner spider 

4x Arm locking buttons 

4x Arm locking springs 

4x M4 recessed washers. 

4x White teflon washers 

Rubber parts: 

8x Anti-vibration dampers 

4x feet 

Anti-vibration damper security locks, 

2 sets. 

..................... 

········;············· 

4 

•• 

•• 
Bag of spare parts containing: 

2x Dampers 

2x Sets of damper retainers 

2x Feet 

4x Arm locking springs 

4x Arms locking buttons 

PPM in/ out cables 

NAZA GPS Pickoff cable 

Note: this cable must be connected 

directly to the NAZA GPS. Connecting 

it between NAZA PMU and NAZA 

won't work. 

GoPro cable 

5 
~ 

. . . 

FlightCam cable 

Note: this is a picture of the "first 

batch" cables. The correct ones have 

the black in the middle. (the cable is f!S · ...·. :. ; .. ~:JAd!. .. , u•'''•.. T ... _! .. ; t4~~;li11~~ • ·!~-· .. i 

OK and can be used unchanged with 

FatShark 600!700 tv/ CMOS) 

VTx video/audio cable 

... E .. ·- -...1111%'% • .. ,_,:::/tli 

VTx power cable 

IIIII I II 

Package Contents, Gimbal (Optional) 

6 
2-Axis brushless gimbal. 

Note: package ships with a DJI 

Phantom mount, which is not 

required for use on a XuGong 

but you must keep it as it is 

required to upgrade the gimbal. 

7 

• • 

' 

; . 

. . 
Preparation 

Before starting assembly of the Xu Gong it is highly recommended to wash the carbon fibre 

parts in water, to remove any fibres which might remain after the production process. 

These plates are pre-washed in the factory, but a second washing after shipping is 

recommended. 

Dry the plates completely before starting assembly. 

Step #1: Frame Assembly 

The first step in the assembly of a Xu Gong v2/Pro is to assemble the carbon-fibre frame, and 

mount the gimbal onto it. 

Note: Unlike the v1 version of the quadcopter, the frame can be completed before the 

electronics are installed. The larger hole above the flight controller, and the larger holes in the 

bottom of the frame, allow electronics to be installed without removing frame plates. 

8 
• f 

9 
The frame is assembled using our custom 'T-Nuts'. These consist of a plastic retaining part, 

an aluminium 'nyloc' M3 nut, and an aluminium M3 bolt. 

The nut may be inserted into the retainer, with the flat part of the nut facing the flat part of the 

retainer. 

This pair is then inserted into the 'T' hole in the first 

plate, and the screw inserted through the hole in the 

second plate. 

The resulting structure is extremely strong, and will 

easily survive even the most serious of crashes, 

protecting the electronics that it houses. 

Be careful with the orientation of the front 

gimbal-bulkhead plate, which has two mounting 

holes which line up with matching holes in the 

back of the gimbal. 

Pre-inserting all of the nut/retainer assemblies into all T-Nut slots in a part will speed up 

assembly: 

Tips: It's a/so a good idea to insert the rubber feet on the bottom plate at this point. It can be 

almost impossible to do it once the frame is assembled. Careful not to twist the rubber feet in 

carbon plate as it will cut the rubber 

10 
It is advisable to install the gimbal at this point, since the screws are a not easy to access 

once the frame is assembled. 

WARNING: when installing the gimbal make sure to use the screws that come with it. 

Pay special attention to the ones used to mount the gimbal on the top plate (M2x5). Using 

longer screws may cause electrical shorts. 

Before completing the frame, it is highly advisable to mount the lower part of the Naza GPS 

support, since screws must be installed from inside the frame. 

,,J% 

L.f:l WARNING: Never install the GPS mounting screws with the threaded end of the screw 

in the battery compartment. Doing this would cause a fire when the LiPo battery is installed 

in the compartment! 

Install the screws with the domed head inside the compartment, and the threaded part, and 

nut, on the outside of the frame. 

11 
. -. 

Step #2: Arm Assembly 

The milled aluminium arms are the next thing to assemble. The outer arms are supplied with 

the thrust bearing (the hinge parts) pre-assembled. 

NOTE: It is highly recommended to avoid disassembling the bearing, since springs and 

ball-bearings have a habit of launching themselves across the room. 

NOTE: To prevent wearing out the thrust bearing and to avoid 'squeaky' noises when folding the 

arms it is recommended to put a tiny bit of silicone grease on the ball bearings so that they are 

lubricated and will not wear out the plastic parts. The use of any other grease is not 

recommended as it often is acidic and will degrade the plastic over time. 

Assembly of the 'center spider' to the outer arms is simple, install the thrust bearing part into 

the center spider, add the red washer, install the M4 domed-head screw, and the nyloc nut. 

NOTE: An additional small thin, white, M4 washer is included in the kit. This must be installed 

between the head of the M4 domed-head screw, and the red washer. The washer prevents the 

continuous rotation of the arms from unscrewing the screw. 

12 
To assemble the arm locking lever, simply insert the spring into the hole in the outer arm, and 

press the lever into place (a fair amount of force is needed, don't worry, they don't break 

easily). 

13 

.. 
Once the arms are complete, they can be attached to the central electronics plate (Power 

Distribution Board) using the supplied M4 countersunk screws, and matching nyloc nuts. 

Ensure that the swept-back arms (the front arms) are towards the front of the plate. 

14 
Step #3: ESC Mounting 

ESCs are mounted under the center section of the arms (the 'center spider) using a high-bond 

double-sided tape. 

NOTE: Nylon ties, velcro straps, etc. cannot be used to mount the ESCs due to the fact that the 

outer section of the arm folds over the inner section. 

A heat-shrink tube may be used, assuming the tube is thin enough to allow the arms to fold. 

Once the ESCs are mounted, their power cables may be cut to length, and soldered to the 

power distribution board, using the solder points shown below: 

The pads are arranged so that the coaxial power cables of the DJI E300 ESCs can be easily 

soldered (the outer shield of the coax cable is cut back and soldered on the negative pad, and 

the center conductor soldered onto the positive pad). 

NOTE: Don't be afraid to cut the ESC power cables as short as needed, they can always be 

extended if the ESCs are to be transferred to another platform in the future. 

15 

.. 
. i 

Step #4: Motor Mounting 

The outer frame arms are designed for standard 2212-sized, 920kv brush less motors. 

For motors which use self-tightening props (highly recommended), it is important to ensure 

that the two clockwise, and two counter-clockwise motors are installed in the correct 

locations. 

16 
Three motors have been selected by the lmmersionRC team, and flown successfully for many 

hours. 

1) The motor from the OJI E300 motor/ESC set. This motor is easy to install using the 

screws supplied in the E300 kit. Cables do need extending with these motors either by 

soldering extension wires, or using the supplied extension cables. 

2) The Tiger AirGear 350 motor/ESC set. Note that some of these motors ship with a 

prop-shaft circlip which has long 'teeth' which can foul on the center hole of the arm. 

To fix this, either change the circlips for a style without these teeth, or use a drill press 

to make the hole in the outer arm slightly larger. 

Cables do need extending with these motors either by soldering extension wires, or 

using the supplied extension cables. 

3) The custom Tiger AirGear 350 set supplied by lmmersionRC. These already have the 

correct circlip installed, and the correct cable length for the Xu Gong (available shortly 

from XuGong rese//ers). 

Once the motor is installed, and cable extenders (if needed) are attached, it is a good idea to 

'braid' the cables, for cosmetic, and functional reasons. 

Since 95% of our demographics are male, plaiting skills are probably limited. A quick google 

search will explain the technique. Alternatively, ask the wife/girlfriend/mother for help at this 

point:-) 

Last thing to note, ensure that the cables are the correct side of the arms to allow folding. 

This means in front of the front arms, and behind the rear arms. 

NOTE: As a/ways when mounting brushless motors, ensure that the screws used are not too 

long, and cannot damage the internal windings of the motor. 

17 ~n;;,r;;vt;l 

~~ 

.. 
Step #5: Electronics Installation 

Once the frame, and arm/power board assemblies are complete, the next step is to start 

installing the electronics. 

The basic idea is the following: 

1) Everything gets connected to the power board, including the flight controller, video tx 

(but excluding the cameras) 

2) The Naza GPS cable is inserted into the supplied pick-off cable, which is then in turn 

connected to the GPS input of the Naza lite (or the GPS input of the Naza PMUv2 on a 

Naza v2). The 5-pin picoblade connector is then hooked to point 6, shown below. 

3) The flight controller is dropped through the hole in the top of the frame, and secured 

(using double-sided foam tape and/or nylon ties) to the base of the frame. For recent 

flight controllers with a seperate BEG, this is installed alongside the flight controller. 

Note that in order for the cables in the rear of the Naza to clear the battery bulkheact 

ensure that the Naza is mounted as far forwards as it can go (clearing the ESC cables of 

course). You may wish to connect as many of the flight controller cables as possible 

before securing it into the frame, as once in place, attaching the cables can be quite 

fiddly. 

18 
Once all cables are connected, the power distribution board may be secured to the top frame 

plate using the supplied red silicone dampers (Yes, this is a little tricky, but you are almost 

done!) 

The recommended location of the Vtx is behind the front left supporting plate, with the 

antenna exiting through the supplied hole in the front bulkhead. 

Why the left plate you ask ... because if the antenna unscrews in flight for any reason the 

antenna will drop behind the gimbal, and not into the front-left prop. 

19 

.. 
Instead of pointing the antenna to the top, you might consider pointing it down, clearing so the 

obstruction created by the other elements when in flight. In this case you might rather 

consider a straight Spironet antenna, bending it down. 

1 

All credits to RCSchim 

If you don't want to use the Naza GPS, you can connect a NMEA GPS like a LS20031. 

Please refer to the picture below for the GPS connector pinout: 

20 
Note: 1 and 5 are connected to the same vee. 

21 o)IJlX§l 

/[Jfj/Q) 

• > 
The Power Distribution Board connections 

1) PPM Output to the Flight Controller (*) 

2) PPM Input from the R/C Receiver (*) 

3) i2c link to 8 channel EzUHF receivers (deprecated, replaced by UPSTAT) 

4) Video Tx Power, full flight pack voltage 

(NOTE: Do not attempt to power a DJI /ightbridge from here ... current draw is far too 

high and will result in burned PCB traces) 

5) Video Tx hookup (Video/ Audio output, and SV DC input for Flight Camera power) 

6) GPS hookup (Use the supplied OJI Naza intercept cable to use the Naza GPS, it must 

be directly connected to the Naza GPS). 

7) FlightCam Input (Powered from the Video Tx) 

8) GoPro/HD camera Input 

9) USB Interface 

1 0) Gimbal Connection 

(*) 1 & 2 are interchangeable. 

22 
Step #6: Flight Control and UHF Configuration 

· DJI Naza Configuration 

The Naza should be configured following the instructions provided by DJI, and their 

configuration tool. 

For Xu Gong compatibility, ensure the following is configured: 

1) PPM input mode (all channels down a single PPM cable) 

2) Camera gimbal disabled (the Xu Gong gimbal is independent of the Flight Controller) 

With a 5200 mAh 4S liPo (like the Multistar 4S 5200mAh ), set gain values to 100%: 

Basic 

Attitude 

Pitch 

;it:.¥1-i··;i 

Roll Yaw Vertical 

23 
., 

EzUHF Configuration 

The single-cable PPM connection between the EzUHF receiver and the XuGong power board 

requires v1.51 (or later) of firmware to support the uplink status. 

The configuration of the EzUHF receiver should be as follows: 

1) 1 0 Channel PPM output 

2) PPM on servo channel1 

3) UPSTAT on PPM slot 10 

Note: To ease programmation of UPSTAT on a receiver equipped with v1.51 of firmware, a new 

version of the lmmersionRC tools is required, v1.41. This is now available from our website. 

~ SeMI.~ 

PPM'Jiklt' 

PPM l ern "' 

PPM2 CM'l "' 

PPM3 CHJ "' 

PPM4 CH.il "' 

PPMS CH:5 "'· 

PPMG CHG .... 

PPM7 CH7 "' 

PPM J!! em "' 

PPM9 CHS v 

PPM 10 UP'STAl v 

PPMn ... PPM 12 CHt2 v 

CH3 'PPM3 

CHA P1'M4 

"' l'meN>bil!~w~thlt 1.2~~~"~ 

_, vUO.~df)le~(*.tJ.Oill'l8~. 

tlllle<l~j 

To~ RSSl.or~~~tQ.~~ RSS!'. IJfUNt<'O!'Ih~~ 

~for~~{N'M)~ 

~for~tt~~ 

\i'lt!tt$PPM~CH1~ 

~tor~•~ 

lOPPM~ 

~ uPSTA.T~CHlO~ 

Simply click the 'Configure for XuGong v2/Pro' to setup your EzUHF receiver. 

24 
RIC Transmitter configuration 

Channel assignments for the XuGong v2/Pro are as follows: 

Tilt (Pitch) 

Throttle 

'Yaw 

Gimbal Tilt 

Video Switch 

; CH1. (roll left/right) 

CH2 (nose up/down) 

CH3 

. CH4(r1Jdder) 

CH5 

CH8 

FrSky Taranis set up with the Naza-M Lite 

With this configuration flipping the SF switch will override any mode and place the quad into 

failsafe mode. 

Mode MultPx Switch 

GPS Atti Add SEt 

Atti Add 

Manual -162 Add 

Fail Safe ' -64 Replace 

25 

. ' 
Step #7: Cleanup, and Fly 

Before flying for the first time, take some time to tidy up the wiring, secure 'flapping' cables 

with nylon ties, and ensure that the cables to the gimbal/gopro are free to follow the 

movement of the two gimbal axes. 

To prevent damage to the power distribution board in a serious crash, insert two (or more) of 

the security locks through the silicone dampers, and lock them underneath. These unique 

locks allow the power board to 'float' above the frame, eliminating vibration, but providing 

support in a crash. 

Step #8: Tune 

To tune the current sensor, for precise flight-time estimates, start with a fully-charged battery 

pack and note the mAh consumed value from the OSD during the first flight. Then charge the 

pack, and note the number of mAh used to recharge. It will tune the current sensor to 

perfection. 

Attach the power distribution board to a PC using a USB cable, and start the latest 

lmmersionRC tools version (download link here). 

Select the Sensor Diagnostics and Calibration for End Users button and follow the steps to 

calibrate the voltage, and current sensors. 

26 
Rm'!Ware Version 

OSD 

Untts 

Jlltttude Units 

IJS l~l Meine 

AlaiTJ1S 

Jllti!udeAiann 

'1so mete!S 

Channels Configuration 

Gimbal Ttl! 

CH5 v 

m.Ah 

CaHSign 

Satellltes Threshold 

:G 

0 Enabled !RCOSO 

Dil!lance Untts Speed Units 

US (j) Metrtc US '')Metric 

Distance Alarm 

;500 meters 

Up Stat 

1

CH10 .,.; 

27 ~~ 

~~~ 

. ' 
Upgrading the XuGong v2/Pro 

To upgrade your Xu Gong v2/Pro you need: 

1) lmmersionRCTools 1.40.5 or higher installed on your pc 

2) USB Micro-S cable 

XuGong v2/Pro Upgrade Operation Step-by-Step 

1) On the right of the gimbal connector, there is a button. 

2) Press and hold it, then connect the USB cable to your PC. 

3) Wait for the XuGong led to flash slowly (1Hz) 

4) Open lmmersionRCTools and select XuGong v2/Pro 

5) Select 'Program' tab and click 'Update Firmware' ,,._~~ 

Cori~JL~~,II 

XuGong v2/Pro detected in program mode 

28 
6) Browse to the firmware location, select it and click 'Open' 

Name Type 

A XuGongPr<>_v1.0.bin 

r,,x.ia~r1991'Q_~,:f:bin·.· 

Fit• name: ; XvGongPro _ v·t.T.bin 

7) A dialog box 'Upgrade Completed' will appear to notify you that 

the upgrade process has completed successfully 

Firmware Upgrade ~l!i~~ 

Upgrade Completed 

29 
The 2-axis Gimbal (Optional) 

The gimbal is a G3 2-Axis Gimbal from Feiyu-Tech. 

It has two different modes as described below. 

Rocker Speed Mode 

the receiver output control the speed in °/S at which the camera tilts. The neutral value 

correspond to oo /s;maximum value correspond to 15° /s; the minimum value correspond to 

-15°/S. 

Rocker Position Mode 

The receiver output controls the position of the camera. The neutral value of the receiver 

output correspond to the horizontal position of the Gimbal; maximum value correspond to the 

max tilt angle; the minimum value correspond to the min tilt angle. 

the only way to change modes is by flashing the corresponding firmware. 

The default firmware loaded in it is Rocker Speed Mode v2.12. 

We suggest you to upgrade to 2.13 since it fixes some issues with the imu: 

"Improved the attitude stability of the IMU module when under the condition of vibration 

and overload. The initialization of the IMU is more reliable." 

You can download the current firmwares and the upgrade software from FY-TECH official 

website G3 2-Axis Gimbal Firmware Download 

To upgrade the gimbal you will need all Phantom accessories supplied with the gimbal. Do 

not discard these! 

30 
Gimbal accessories 

Phantom mounting plate (also used to 

power and upgrade the gimbal}. 

Power cable (connect to P2 connector on 

Phantom mounting board) 

Phantom board to USB to TTL converter 

(connect to P3 connector on Phantom 

mounting board) 

USB to TTL converter 

31 

"' ' 
Gimbal Upgrade Operation Step-by-Step 

1) Connect the two cables on the Phantom mounting board as shown below 

The phantom mounting board needs to be powered via the power cable using a 2S ...... 4S 

LiPo (input voltage range 7-17 V, overload protection 0.8 A), but do not plug the LiPo 

yet. 

2) Connect the USB to TTL converter as show below 

3) Download the "Feiyu Tech New USB Driver'' from FY-TECH official website USB Driver 

Download 

4) Install the driver on your PC 

5) Connect the USB to TTL converter to your PC 

32 
7) Choose the correct COM port and select 115200 (baud rate ) then click 'OPEN' 

Note: It seems that the current software is buggy and only allows you to select COM3 

or COM4, so you may have to force the use of one of this port following the procedure 

below: 

a. Open Control Panei\AII Control Panelltems\Device Manager and right click on 

Silicon Labs CP21 Ox USB to UART Bridge 

b. Click on 'Properties': 'f' lntei(R) Active Management Technology· SOl (COM4) 

r•·Sirit'ti:rliaJ;;c#2ti)ifiSB;;tl=""~"""'-a~···==:"'""' -·- . ""'········· •·····~-·-··-~·····•---~--. ., Update Onver Software ... !Ill Print queues ! 

~ Printel'! ' I Processors 

i-" Security devices 

l!:l Sensors 

Disable 

Uninstall 

Scan for hardware changes 

Properties 

33 

.. ' 
c. Click on 'Advanced': 

d. Select COM3 or COM4 and then click 'OK' 

Select lqwer setlirtjp>to COI'!<!!d connectiOn prol)lemll. 

Select higher setting• fl)rl!l$!er pe!lonn~. 

Itat'ISIIIitBUfi<lr: Low(1) 

High (14) (14) 

High (16) (16) 

8) Plug the LiPo (the gimbal needs the gopro to calibrate correctly at startup, so be sure 

the Go Pro is mounted at this point ) 

34 
LINK OK! 

VERSION 2.12 

UPDATE_j 

1 0) Click 'OPEN FILE' and choose the correct firmware 

You will see the information like in the following picture. 

UPDATE 

fffe: name:H:\FY-G3 2-Axis Gimbal Firmware 

V2.12 (2014.7.23}\63 2-Axis Gimbal Rrm.vare 

V2.12\[Rocker Position Mode] G3 2-AXIS 

Gimbal Firmware V2.12.bin 

length:198664 

crc16-l:Ox3F81 crc16-2:0x3F81 

11) Click 'UPDATE' button to start upgrading. 

12) A dialog box 'SEND OK' will appear to notify you that 

the u rocess has completed successfully. 

SEND OK 

35 

~· ' 
-.. 

. ',

Miscellaneous 

A few notes supplied by some of our test pilots. The kind of things that a XuGong pilot needs 

to know: 

1) The flight time estimate is based upon an 80% battery drain value, and not a full drain. 

If you are getting 20 minute flight time estimates, then unless you are running some 

pretty poor LiPos, the estimates are reasonable. 

2) For long flight times, avoid high 'C' rating packs. The new generation of 1 OC packs are 

lighter than typical packs, and are quite capable of powering the XuGong (SAh * 1 0 = 

SOA, typical hover current is about 12-13A). 

3) Common sense, but try to avoid the use of very high power A/V Transmitters with 

antennas mounted close to the brush less gimbal. 

A 5.8GHz 600mW Tx, with a SpiroNET Omni mounted in the suggested location is just 

fine, but a 1W 1.3GHz Tx, mounted in the same location will almost definitely upset the 

sensitive IMU on the gimbal. 

4) For longer range flying, use a full dipole on the EzUHF receiver, and not a 'sander style' 

whip. The full dipole will give you, in practice, a 1 OdB improvement in range. 

Use a flexible cable for the ground-plane half of the antenna (galvanized bike brake 

cable works fine), and let it simply bend when the quad is on the ground. 

5) Keep the Naza GPS high above the quad, either using the supplied carbon-fibre rod, or 

an equivalent length foldable design. 

Mounting it too close to the electronics on the quad will definitely result in poor flight 

performance. 

6) Before each flight, take great care to ensure that the four arm locking levers are firmly 

locked into place. An arm which folds in flight will result in instant unhappiness. 

Similarly after a crash (or unexpected 'hard landing'), check that the levers are 

undamaged. A set of four replacements are shipped with the product, and spares are 

available from our network of resellers. 

7) Before each flight, ensure that the arm hinges are tight. If arms are routinely loosening 

over time, apply a drop of thread lock to the M4 mounting screw. 

8) The switch between the flight cam, and GoPro, is manual, controlled from a channel on 

the R/C remote. If the selected camera input appears to be non-functional (Go Pro 

shutting down in flight for example), the other camera will be selected automatically. 

36 
9) The selection of PAL/NTSC is automatic, even when the flight cam, and Go Pro are 

using different standards. It is, however, recommended to configure the flight cam and 

the gopro to use the same video standard. 

1 0) The component-side of the Power Distribution Board is coated with a conformal 

coating, to reduce the effects of dirt and moisture. Note that this does not make the 

quadcopter fully waterproof, and flying into thunderstorms is still not recommended. 

11) The PPM passthrough from the R/C Rx to the Flight Controller is passive, and adds no 

additional latency, or risk of an OSD firmware crash downing the quad. The needed 

PPM channels for switching, and the gimbal control, are 'sniffed' from the PPM line 

without the OSD being 'in the loop. 

37 
... 

Specifications 

Maximum Prop Size 

Recommended Flight 

Controller 

Recommended Motors 

· Recommended ESCs 

Recommended RIC Rx 

Recommended Video Tx 

Recommended Antenna 

10" 

OJI Naza Lite, or v2 

2212, 920kv 

15A 

EzUHF, 4 channel cased, or 8 channel diversity, w/v1.51 or later 

. installed. (Note EzUHF-Rx v1.51 is compatible with EzUHF-Tx 

v1.50), Single~cable PPM hookup. 

Recommended Battery · Hobby King 5200mAh 4s, 1 OC 

Typical hover current is -12-13A 

Onboard GoPro Supply 5V, at 1.5A maximum 

(Flight cam powered by VTx) 

GPS t-Jaza.GPS pickoff (Position + staticcompass) 

Flight Time > 20 minutes with recommended configuration 

Camera Switch Manual, between flight cam and GoPro, with autqmatic fail over. 

Camera Compatibility Any 5V flight cam, Fatshark 600tvl CMOS highly recommended, 

GoPro 3 or 4 on the gimbal. GoPro battery is optional (depending 

, on FW version of GoPro, the battery is necessary to start video 

recording) 

Telemetry : lmmersionRC telemetry downlink, compatible with antenna 

trackers, and the iTelemetry apps on smart-phones. 

{Positional, Uplink status, Batterystatus) 

Gimbal XuGong 2-axis brushless gimbal option. Single cable connection to 

• the XuGong. 

WeightAUW (Grams) -1.5kg typical 

Folded Size 24cm W x 30cm L x 14cm H 

r--

l•mcn~r,~ 38 
Battery Compartment 

Size 

-5cm W x 12cm L x 3cm H 

Spare parts 

Please contact your reseller for any spare parts required. 

Support 

First line of support is handled by the reseller. If you encounter any problems with your 

lmmersionRC product please contact them first. 

For support on issues involving equipment from other brands and also general support for 

lmmersionRC products, the best place to go is the lmmersionRC section of FPVIab.com. 

We actively monitor this forum and provide support here. 

Tutorial Video 

Xu Gong v2/Pro Build video 

https://www .youtube.com/watch?v=RHdg2r8PPf8 

Gimbal Upgrade video 

httg://www.youtube.com/watch?v=9QN4ygJ6uiU 

Thanks to d3wey for these great videos! 

39 
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Li1 

Regulatory notice 

The use of this product may be prohibited in your country/region/state, please verify that the 

RF output power and frequencies used by this transmitter comply with local rules and 

regulations, this product may require a license to operate. 

Directions on safety 

lmmersionRC advocates the safe use of their products, always make sure you equipment is in 

proper working order, is checked prior to every flight and that your are familiar with and 

respect the equipment's capabilities and limitations. Do NOT fly recklessly, do NOT fly near 

airports, freeways, towns, people, etc, basically anywhere where a equipment failure or pilot 

error can result in injury or damage to people and/or property. 

Warranty 

For warranty claims or repair requests please consult the retailer that you purchased this 

product from, they will be able to help you with your warranty claim or repair request. 

40 
Social Networks 

usliJ 

We would like thank you for purchasing this lmmersionRC product. 

Like lmmersionRC's Facebook page and be kept up-to-date with news, product releases, 

firmware updates, tips and tricks, and other information relevant to the FPV hobbyist. 

http://www. facebook.com/lmmersion RC 

You can also follow us on Google Plus 

google.com/+immersionrc 

We have even been known to Tweet on occasion 

.https://twitter.com/@immersionrc 

Feedback 

We would like to hear from your experience with your the Xu Gong v2/Pro. 

For that, we have created a facebook page dedicated to this frame, so don't hesitate to post 

any comments\suggestions\video about your experience (good or bad) with your XuGong 

v2/Pro ' 

https://www. facebook.com/1 RCXuGong 

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