User Manual

Arkbird FPV
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(probably through a button).
Please refer to the manual of receiver. Set the fail-safe position the same as Return-to-Home
Mode through CH5 and CH6 (CH5>50%,CH6 > 70%). And then turn off the radio to check if it
switches to Return-to-Home Mode
（Note: No need to set fail-safe from channel 1 to channel 4 as these four channels are
controlled by autopilot under Return-to-Home Mode, which is not relevant to receiver.）
9 .FAQ
Q： Cannot locate home, Unable to control the plane
A： The elevator lifts up a bit, unable to control the plane, and waiting for positioning proves GPS
wiring is OK, otherwise, please check GPS wiring.
GPS’s white antenna shall face up; keep GPS away from Video TX and Camera. Some inferior
Video TX’s antenna will affect GPS, too. You can try to remove the casing of GPS, or put a layer of
tin foil paper under GPS to enhance the performance.
GPS can only work Outdoors, First time about 5-10 minutes, next power on of the same day
it would take less than 10seconds to locate.
Q： Plane tilts under Balance Mode / Manual Mode, can I adjust the radio TRIM
A： First time installation, do a neutral point alignment. Radio stick and SUB-TRIM back to center,
adjust plane’s CG and travel angle to make plane balanced.
Arkbird can produce compensation when CG & travel angle is not appropriate, but it is not
mechanical stable, there would be hidden trouble under RTH mode. So firstly make sure plane
can fly stably in horizontal under Manual Mode.
Q：Inaccurate Return-To-Home
A： Adjust remote control rudder angle to 100% and sub-trim back to center. Check carefully in
reference to the “Debugging Skills for Balance and RTH Mode” chapter of our instructions.
Make ground video recordings. When switching to RTH or other autonomous flight modes,
Roll/ Pitch inclination value and throttle control value will be shown at the bottom right corner of
OSD. These data will tell you if the control values are proper and will help you judge which
parameter needs to be sub-trimmed.
Attention：
Please read through carefully:
1. The design purpose of autopilot is to keep balance of flight, it is not able to manipulate plane
or prevent stall. You must have sufficient experiences of fixed wing to control the flight.
2. The autopilot is only for small-scale RC model. For safety concern, please do not install in
plane for aerial photography which might fly over crowd.
3. Please install the autopilot depends on your demands and check the condition before flying
every time.
4. Any equipments and electric products on the plane couldn’t be completely reliable, please
using this system following the instruction. The system provider is not responsible for any direct