# X PlusOne Operating and Maintenance Manual Date: May 1 5 , 2015

Author: Alex Kaiser

xCraft Enterprises , LLC 1205 U.S. 2 Sandpoint, ID 83864xCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page: i of iv



### REVISION RECORD **REV DATE**  **BY CHECKED BY**  **APPROVED** IR 05/15/15 Alex Kaiser Dustin Ehrmantrout JD Claridge PAGES CHANGE All Initial releasexCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page: ii of iv 

### TABLE OF CONTENTS **1. Overview**  **................................ ................................**  **................................ ...................**  **1 2.**  **Check lists**  **................................ ................................**  **................................ ..................**  **4** 2.1 Normal Operation ................................ ................................ ................................ ............... 4 2.2 Emergency ................................ ................................ ................................ .......................... 5 

### 3. **Setup ................................**  **................................ ................................**  **.......................... 6**  3.1 Assembly

instructions ................................ ................................ ................................ ........ 6 3.2 Battery

Charging ................................ ................................ ................................ .............. 12 

### 4. **Operation ................................**  **................................ ................................**  **................ 13**  4.1 Flight Modes ................................ ................................ ................................ ..................... 13 4.2 RC Controls ................................ ................................ ................................ ...................... 13 4.3 Hover Controls ................................ ................................ ................................ ................. 14 4.4 Forward Flight Controls ................................ ................................ ................................ ... 16 4.5 First Flight ................................ ................................ ................................ ........................ 18 4.6 Transition Flight ................................ ................................ ................................ ............... 19 4.7 Ai Operation (Ai Option) ................................ ................................ ................................ . 19 4.7.1 Loiter ................................ ................................ ................................ ............................ 19 4.7.2 Auto ................................ ................................ ................................ .............................. 19 4.7.3 Guided ................................ ................................ ................................ .......................... 20 4.7.4 Follow Me ................................ ................................ ................................ .................... 20 

### 5. **Emergencies ................................**  **................................ ................................**  **............ 21**  5.1 Lost Link ................................ ................................ ................................ .......................... 21 5.2 Bird Attack ................................ ................................ ................................ ....................... 21 

### 6. **Maintenance ................................**  **................................ ................................**  **........... 22**  6.1 Operational Limits ................................ ................................ ................................ ............ 22 6.2 Software Updates ................................ ................................ ................................ ............. 22 6.3 Repair ................................ ................................ ................................ ............................... 22 6.3.1 Propellers ................................ ................................ ................................ ..................... 22 6.3.2 Non - Serviceable Components ................................ ................................ ..................... 23 6.3.3 Replacing Components ................................ ................................ ................................ 23 6.4 Inspections ................................ ................................ ................................ ........................ 24 6.4.1 Preflight Inspection ................................ ................................ ................................ ...... 24xCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page: iii of iv 6.4.2 Periodic Inspe ction ................................ ................................ ................................ ....... 25 6.4.3 Control Check ................................ ................................ ................................ .............. 26xCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page: iv of iv 

### ABBREVIATIONS, ACRONYMS & SYMBOLS AH Amp Hour FAA Federal Aviation Administration FT Feet FWD Forward GPS Global Positioning System HR Hour IN Inches LB Pounds MIN Minutes N/A Not Applicable RPM Rotations Per Minute SEC Seconds VTOL Vertical Takeoff and LandingxCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 1 of 26 

### 1. **Ov e**  **rview** The X PlusOne is a hybrid platform that is capable of hovering and forward flight. The X PlusOne takes off, hovers, and lands like a traditional quadcopter, but that's where the similarities with a multi -rotor stop. The key

differentiator is this: In place of the quadcopter frame is an upward facing wing. This allows the X PlusOne to pitch over 90 degree s and fly nose - first at over 60 mph (100 km/h), twice as fast as a traditional quadcopter! Flight control is handled by varying motor speed to provide pitch, roll, and yaw control, even in forward flight mode. There are no traditional flight control surf aces on the X PlusOne. Thereb y saving weight and complexity and ensuring the overall design remains clean and efficient. All components will be defined as though the X PlusOne is in forward flight. The following images have the major components labeled the way the y will be referenced.



## t op v iew left motor right motor

left wing right wing payload (standard nosecone) GPS antenna (Ai option) front/nose

back/tailxCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 2 of 26



## bottom view battery hatch FPV antenna (FPV option) telemetry antenna (telemetry option)

safety switch (Ai option) status LED (Ai option) external USB (Ai option)xCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 3 of 26



## side view top pylon

bottom pylon top motor

bottom motorxCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 4 of 26 

### 2. **Check list** **s 2.1**  **Normal Operation** Preflight Checklist 1. Check that the p yl ons are properl y installed onto the wing 2. Check for loose parts or wires 3. Check foam and plastic components for signs of damage 4. Propellers are tight and installed to rotate in the proper direction 5. Battery

fully charged 6. Battery

installed, power not connected 7. Battery

hatch secured 8. CG is within tolerance 9. Payload is within maximum allowable weight limit Before Takeoff 1. Transmitter on 2. Transmitter charged 3. Correct flight mode selected 4. Area free of obstructions 10 ft around craft 5. No obstructions overhead 6. Connect battery 7. Connect ground station (optional) 8. (Ai option) Press and hold safety switch 9. Arm motors 10. Check motor direction Takeoff 1. In crease throttle to climb 2. Climb vertically

to 15 ft 3. Check control response 4. Proceed with flight Before Landing 1. Check landing area for obstructions 2. Fly to landing site 3. Transition to hover 4. Descend to 50 ft Landing 1. Descend verticall y at a reasonable rate 2. Adjust position during descent to land at desired location 3. Reduce throttle to minimum after touchdown 4. Disarm motors 5. Dis connect ground station if connected 6. (Ai option) Press and hold safety switch 7. Disconnect connector and remove batteryxCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 5 of 26 8. Turn transmitter off Postflight 1. Check battery

for overheating, or expansion 2. Check motors for overheating 3. Check airframe for damage or loos e/missing components Autonomous Flight 1. Perform Preflight check 2. Perform Before Flight check 3. Switch flight mode to “Auto” 4. In crease throttle to begin mission 5. Monitor aircraft visually 6. If necessary

engage manual control by switching flight mode a. Stabilize craft b. Return to Auto mode at pilot’s discretion 7. Once craft lands, reduce throttle to minimum 8. Disarm motors 9. Disconnect ground station if connected 10. Disconnect and remove battery 11. Turn transmitter off **2.2 Emergency**  Lost Link 1. Check controls 2. Check flight mode 3. Set throttle to half 4. Touchdown, set throttle to minimum 5. Retrieve aircraft Control Failure 1. Check controls 2. Check flight mode 3. Set throttle to minimum 4. Retrieve aircraft Bird Attack 1. If fl ying autonomously, engage manual control 2. Attempt to evade bird by making abrupt attitude changes 3. If attack continues, land 4. If attack stops, continue with flightxCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 6 of 26 

### 3. **Setup 3.1**  **Assembly instructions** To prepare for a fli ght, observe the following steps: 1. Connect the pylon wires to the wires in the top of the wing as shown below. Connect two bullet connectors and single ESC wire. Ensure bullet connector polarity is correct. **Caution: Ensure wire polarity is correct or damage will result.**  **Connect red pylon wire to red wing wire and black pylon wire to black wing wire.** xCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 7 of 26 2. Insert the p yl on spars and slide the pylon onto the wing. As you slide the pylon in place, bundle the wires into the cavities in the wing and p yl on.

3. Insert p yl on mounting screws as shown abovexCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 8 of 26 4. Install the other pylon onto the bottom of the wing by repeating steps 1 through 3 with the second pylonxCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 9 of 26 5. The X PlusOne uses 2 clockwise spinning propellers and 2 counterclockwise spinning propellers. Attach the clockwise spinning propellers onto the top and bottom pylon motors and the counterclockwise spinning propellers onto the wing motors. Clockwise spinning propellers are marked with an “R” on the propeller blade. To install the propellers, slip them onto the motor and add the spinner. Tighten the spinner b y holding the motor stationary and rotating the spinner with a thin metal rod , such as a small screwdriver , inserted into the hole in the top of the spinner and rotating the spinner clockwise. Ensure a spinners are tightened securel y.

clockwise propeller (R) spinner

clockwise propeller (R) Counterclockwise propeller

counterclockwise propeller

ensure writing is facing upxCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 10 of 26

rotate clockwise

hold stationaryxCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 11 of 26 6. Install Payload a. For the standard nosecone, install it as shown in the image below using the supplied hardware b. For all other payload options, follow the instructions included with the payloadxCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 12 of 26 7. (Optional) Install GPS antenna using the provided double - sided tape as shown

**3.2 Battery**  **Charging** 1. Connect power cord and plug it into power outlet 2. Check that the status light for LiPo is illuminated. If it is not, press the Start/Stop/Select button to select LiPo 3. Connect charging cable to charger b y connecting the red cable into the red port and the black cable into the black port 4. Connect the balance plug of the battery into the 3 cell port on the charger 5. Connect the yellow power connector of the battery to the power connector of the charger 6. Begin charging b y pressing and holding the Start/Stop/Select button until the charger beeps and the status light turns red 7. Once the battery

is charged the status light will turn green and the charger will beepxCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 13 of 26 

### 4. **Operation** How to operate your X PlusOne **4.1 Flight Modes**  Your X PlusOne has two standard flight modes (Hover and Forward Flight) and four flight modes (Loiter, Guided, Auto, and Follow Me) that rely on optional equipment: Hover Manual flight control Auto - level will keep craft pointed up when right stick is centered Forward Flight Manual flight control using forward flight controls Auto - level will keep wings level when aileron stick is centered Loiter (Ai option required) Hover in place Position can be controlled with hover controls Auto (Ai option required) Autonomous mission X PlusOne will fly

the flight plan saved to the autopilot Guided (Ai and Telemetry options required) Ground station controlled flight X PlusOne will fly

to way points sent from the ground station in real time Follow Me (Ai option, Telemetry option, and ground station with GPS required) Follows ground station X PlusOne will follow the ground station as you move **4.2 RC Controls** 

rudder (yaw)

elevator (pitch) throttle aileron (roll)xCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 14 of 26

**WARNING: Do not fully reduce throttle unless**  **your X PlusOne has landed 4.3**  **Hover Controls** Whi le hovering, the X PlusOne functions as a standard quadrotor.

Throttle Forward In creases motor speed If throttle is above hover position (varies with payload) craft will climb back view Throttle Backward Decreases motor speed If throttle is below hover position (varies with payload) craft will descend

back view

Rudder Left Rotates wings counterclockwise top view

Rudder Right Rotates wings clockwise top viewxCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 15 of 26

Elevator Forward Pitches nose forward craft will fl y forward side view

Elevator Backward Pitches nose backward craft will fl y backward side view

Aileron Left Rolls nose left craft will fl y to the left back view Aileron Right Rolls nose right craft will fl y to the right back viewxCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 16 of 26 **4.4 Forward Flight Controls**  While in for

ward flight, the X PlusOne functions as a standard airplane. Throttle Up In creases motor speed which increases airspeed side view

Throttle Down Decreases motor speed which decreases airspeed side view

Rudder Left Turns nose left top view

Rudder Right Turns nose right top viewxCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 17 of 26

Elevator Forward Pitches nose down craft will descend side view

Elevator Backward Pitches nose up craft with climb side view

Aileron Left Rolls wings left back view

Aileron Right Rolls wings right back viewxCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 18 of 26 **4.5 First Flight**  1. Perform preflight inspection 2. Put X PlusOne on flat, level surface 3. Power on transmitter 4. Install battery

and connect power 5. (Ai only) a. Press and hold safety button until it is solid red b. Verify

that indicator LED is flashing green 6. Arm by

holding the left stick down and right for several seconds. 7. (Ai only) Once armed, the motors will begin spinning

8. Takeoff b y increasing the throttle slightly above half 9. Familiarize yourself with how the X PlusOne responds to control inputs 10. L and a. Return to takeoff point b. Achieve stable hover at 10 ft. c. Reduce throttle to smoothly descend d. Fully reduce throttle once on the ground 11. Disarm by

holding the left control stick down and left for several seconds.

12. (Ai only) Press and hold the safety button until it begins flashing 13. Disconnect battery 14. Turn off transmitter **WARNING: Never approach the craft when it is armed**

**TIP: It is suggested that you do not attempt to**  **transition to forward flight until you are comfortable with hover controls** xCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 19 of 26 **4.6 Transition Flight**  Once you feel comfortable hovering your X PlusOne it is time to transition to forward flight. 1. P erform all preflight checks and prepare craft for takeoff 2. Takeoff and climb to a suitable altitude for transition 3. Flip switch to forward flight

a. If in an auto - leveling flight mode, craft will begin pitching forward b. If not in an auto - leveling flight mode, s lowl y (2 - 4 seconds) pitch nose forward until craft is horizontal

4. Continue flying and familiarizing yourself with the X PlusOne in forward flight 5. When transitioning back to hover, fl y the craft straight and level with roughly half throttle at a safe altitude (at least 100 ft. until you are familiar with transition) and flip the switch to hover mode 6. The X PlusOne will automatically transition back to hover 7. Perform the transition from hover to forward flight and back several times to familiarize yourself with how the X PlusOne acts during the transition 8. When ready to land, set flight mode to hover and land as described above 9. Disarm 10. (Ai only) Press and hold the safety button until it begins flashing 11. Disconnect battery 12. Turn off transmitter **4.7 Ai**  **Operation (Ai Option)** Once you have familiarized yourself with your X PlusOne you may want to fly

it autonomously . **4.7.1 Loiter** 

When in Loiter mode yo ur X PlusOne will hover in place. Using the hover controls on your transmitter you can reposition the craft. **4.7.2 Auto** 

Auto mode is used to fly

an autonomous mission. To fly the mission, prepare a series of way points in mission planner and upload them to your X PlusOne . If the mission does not include a way

point for takeoff manually takeoff and switch to Auto mode in flight. If the mission does not include a way point for landing the craft will hover at the last way point and wait for the pilot to disengage Auto mode and land the X PlusOne manually . **WARNING: CG outside of acceptable range can lead to unsafe flying** 

**characteristics. It is very important to check CG before each flight**  **TIP :**  **For first transition flight climb to at least 100 ft. before transition to forward flight** 

**TIP :**  **If at any time you lose orientation while in forward flight, switch to hover mode and set the throttle to at least**  **half and the craft will right itself. You can then transition back to forward flight.**  **NOTE :**  **Controls will switch from Hover to Forward Flight** xCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 20 of 26 **4.7.3 Guided** 

Guided mo de requires an active connection to a ground station and allows the operator to control their X PlusOne through the ground station. Guided mode can be entered any time the motors are armed. The operator can set the craft to fl y entirely through the ground station including takeoff and landing. **4.7.4 Follow Me** 

Follow m e allows the X PlusOne to follow a GPS equipped ground station. The craft will maintain a set altitude above the ground station as the ground station moves. The craft must first be in the air before entering Follow Me mode.xCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 21 of 26 

### 5. **Emergencies** In this section we discuss a number of possible in flight emergencies and how the pilot/operator should respond. This is not intended to be a complete list but is instead meant to highlight several possibilities. **5.1 Lost Link**  In the event that your X PlusOne loses contact with your transmitter it will enter a radio failsafe mode. Y our X PlusOne will act in one of two ways depending on how it is equipped 1. Standard X PlusOne a. Craft will enter hover mode and will begin descending b. After 20 seconds the motors will shut off 2. Ai Option a. If the craft has a valid GPS position it will Return - to - Launch (RTL) this means it will return and land at the spot it took off from b. If the craft does not have a valid GPS position it will land in its current position **5.2 Bird Attack**  What to do if your aircraf t is attacked b y a bird. If hovering, transition to forward flight. If in forward flight, transition to hover. Attempt to evade the attacker. The method of attack will determine the best course of action. If the attack continues land the craft. If the attack stops, continue the flight at your discretion .xCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 22 of 26 

### 6. **Maintenance** This s ection has information on how to keep your X PlusOne flight ready. **6.1 Operational Limits**  Maximum altitude 400 ft Range 0.5 miles Maximum estimated flight time 22 min Payload capacity 1 lbs **6.2 Software Updates**  Visit www.xcraft.io regularly to check for the latest version of all software **6.3 Repair**  In formation on user serviceable components and non - serviceable components **6.3.1 Propellers** 

Always balance all propellers used on your X PlusOne. Balanced propellers will greatly improve performance and allow clearer images from onboard cameras. To balance propellers, follow the recommended procedures below. 1. Insert a rod into the hole in the center of the propeller 2. Allow propeller to freel y rotate and make note of which blade points up, this is the “light” blade

3. Add weight to the light blade . This can be done by adding a small piece of tape or nail polish to the underside of the propeller blade . 4. Repeat steps 2 and 3 until the propeller balances horizontally on the rod light blade

heavy blade **TIP :**  **For best results use a prop eller balancer** xCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 23 of 26 **6.3.2 Non**  **- Serviceable Components** 

There are several components of the X PlusOne that are not individually replaceable. These parts can be found in the wing assembly (main wing foam , wing spars, battery compartment, and spar insert) and the p yl on assembly (main pylon foam , and p yl on spars). To replace these components: 1. If the component to be replace is in the wing, remove both pylons and set them aside 2. If the component is in a pylon, remove that p yl on and set the other p yl on and wing aside 3. Remove the cover (either wing cover or p yl on cover) by removing the screws holding it in place and sliding the cover off 4. Remove all electronics from damaged assembl y a. Make careful note of all connections to the removed components as well as wire routing throughout the assembly 5. Unscrew motor mount(s) from spars and foam and remove motor mount(s) 6. Install motor mount into new wing or p yl on assembly 7. Install electronics into new wing or p yl on assembly a. Check that all connections and wire routes are installed properly 8. Reinstall the cover 9. Reinstall the pylon(s) **6.3.3 Replacing Components** 

1. If the component to be replace is in the wing, remove both pylons and set them aside If the component is in a pylon, remove that p yl on and set the other pylon and wing aside 2. Remove the cover (either wing cover or p yl on cover) by removing the screws holding it in place and sliding the cover off

a. If the cover is damaged , simply replace it and reassemble your X PlusOne 3. Replace damaged component a. For electrical components, make careful note of all connections to that component as well as wire routing and make sure to reconnect all connections and run all wires as they

were before b. For motors or motor mounts, remove the screws holding the motor mount to the spars and the screws holding the mount to the wing or p yl on foam Reinstall the motor mount and reconnect the motor wires to the speed control (making sure to reconnect the wires as they were b efore ) 4. Reinstall the cover 5. Reinstall the pylon(s) **TIP :**  **You may want to take several pictures after removing the cove r to**  **aid in reassembly**

**TIP :**  **You may want to take several pictures after removing the cover**  **to aid in reassembly** xCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 24 of 26 **6.4 Inspections**  **6.4.1 Preflight Inspection** 

1. Check that the p yl ons are properl y installed onto the wing 2. Check for loose parts or wires 3. Check foam and plastic components for signs of damage 4. Propellers are tight and installed to rotate in the proper direction 5. Install battery

but do not connect power 6. Secure the battery

hatch 7. Check that CG is within tolerance a. Make sure all components are installed b. Lift up your X PlusOne and find its center of gravity by attempting to balance it on two fingers (one on either side of the p yl on , the same distance from the nose) c. If the nose tips down the CG is forward of your balance point d. If it tips up the CG is behind your balance point e. Adjust the position of your fingers until your X Plus One balances and make note of the position of your fingers, this is the CG f. Measure the distance from the CG to the back edge of the battery compartment as shown below g. The acceptable range is 3⁄8 ” to 1 1⁄4” from the battery compartment to the CG

forward CG limit

aft CG limit measure from here

**TIP :**  **You may want to mark the forward and back CG limits to make checking the CG**  **easier**xCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 25 of 26 **6.4.2 Periodic Inspection** 

P erformed every

10 flight hours More detailed than Preflight Inspection 1. Spin each motor by

hand and check that the motors spin smoothly and quietly 2. Inspect airframe for damage. a. If there is evidence of damage under a cover remove that cover and inspect the components underneath 3. Remove prop ellers and perform the control check found on page 26 4. Check the rigidity

between the top pylon and the wing a. Hold the wing in one hand and keep it stationary b. Hold the top pylon with your other hand c. Apply light pressure to the pylon and verify that it does not flex more than a few degrees in any direction d. Repeat steps a- c on the bottom pylon 5. Remove both pylons 6. Inspect wires that go between the p yl ons and the wing a. Check the wire insulation for any exposed wire b. Check connectors, verify that connections are not loose 7. Check landing gear a. Hold one of the p yl ons in one hand b. Grasp the landing gear with the other hand c. Verify

that landing gear is firmly attached d. Repeats steps a- c with the other p yl on 8. Reinstall both pylons 9. Reinstall propellers 10. Perform a preflight inspection found on page 24 Pixhawk only : 11. Connect X PlusOne to mission planner 12. Connect battery

and check battery

voltage displayed 13. Disconnect the battery and measure its voltage with a volt meter 14. Verify that the measured value is within ± 0.1 V of the value displayed in mission plannerxCraft Enterprises, LLC Report No: D -ENG - 501 - 02 Operating and Maintenance Manual Revision: IR X PlusOne Date: 0 5 /1 5 /1 5 Page 26 of 26

**WARNING: Remove propellers before arming**  **6.4.3 Control Check** 

A control che ck should be performed during the periodic inspection 1. Remove the propellers 2. Power on transmitter 3. Install battery

and connect power 4. Arm the motors 5. S lowly

increase the throttle until the motors begin spinning 6. Test each control input and check that the motors respond as shown in the table below Control Input Left Wing

Motor Top Pylon

Motor Bottom Pylon

Motor Right Wing

Motor Elevator forward = faster slower = Elevator backward = slower faster = Aileron right faster = = slower Aileron left slower = = faster Rudder right faster slower slower faster Rudder left slower faster faster slower 7. Disarm the motors 8. Disconnect battery 9. Power off transmitter