TinyQuad redesigned

After having some big crashes due to motors coming off the mounts, we decide to modify the design and use square carbon tubes (we also try with aluminium) that allow us to screw the motors to the arms. We have also redesigned the central plates using carbon sheets. And finally but not less important we have added the sonar to allow "altitude hold".

This is the result:


Specs:
Frame:
- Arms: Square Carbon fiber tubes
- Center: Carbon fiber
- MotorToMotor distance: 28cm
Motors: Turnigy 1811-2000kv
ESC: Turnigy Plush 6A
Lipo: 3S610
Sonar: Maxbotix LV-EZ0
Props: 3-blade 5x3
Weight RTF: 250gr
Core: ArduPilotMega and IMU (Oilpan)
Code: Ardupirates Rev 527