Demo the Drone flight modes include Failsafe RTL Geo Fence modes.

   The flight modes are relative with security.
In my APM setting,when lose RC signal or GPS signal ,the Drone will auto Landing.
and IF the Drone fly over the GEO Fence setting,it will enter RTL mode.
and I set Channel 8 for force RTL mode,too.



1.Geo Fence test

How to build the Drone with components made by 3DP.

  This  show you how to build the drone designed by myself with  3D printer.

   My Drone's Axis distance is 406mm,You need to prepare the 4   6mmX6mmX200mm square carbon    fiber pipes.and This sample  used A2212 1400kv motors ,Xrotor 20A ESC.APM 2.8 controller with AV ball.Regarding Battery,It use Phoenix 5000mha Lipo. It can fly about 20 minutes .
 

<picture 1>There are the motor's docks(Motor_dock.stl).you can lock your motors on this dock.
                  This sample used  A2212 1400kv motor.

<picture 2> This sample used the 6mmx6mm square carbon fiber pipe as drone's Arms.later you can put on your motors and ESC like below <picture 5>. (ESC.stl +Motor_dock.stl)