The second generation of my 3D printed coaxial dualcopter is here! And this time it works almost as I wanted.

Just watch the video

On the more technical details:

1. It runs INAV 2.0 with a custom mixer
2. Thrust and yaw control is provided by 2 counter rotating propellers
3. Upper motor is 2205 2300KV with 5×4.5×3 propeller rotation in CW direction
4. Lower motor is 2205 2600KV with 4×4.5×3 propellers rotating CCW
5. Control surfaces are rotated 45 degrees from the long axis to fit servos
   flight controller is also 45 degrees rotated
6. Any 9g servos will do
7. runs on the 4S battery that has to be on the top of the device
8. All 3D printed parts can be downloaded from Thingiverse

Required parts:

1. 2205 2300KV brushless motor
2. 2205 2600KV brushless motor (2300 also will do but will have less yaw authority)
3. 5×54.5×3 propeller
4. 4×4.5×3 propeller
5. 2 14mm carbon pipes (12mm internal diameter), each around 270mm long
6. 2 2g servos
7. 3M bolts to secure the motors
8. good adhesive tape to make control surface hinges
9. pushrods
10. hot glue
11. flight controller compatible with INAV
12. radio receiver