those are various version of motor protection for QAV210/QAV180. It has been printed in filaflex/ninjaflex and sound to protec nicely your motors !
Shoe in PLA, layer 0,15, infill 20%.
the variation are only on the opening,
- 3 holes diameter 4mm
- 4 holes diameter 2.5mm
- 4 holes diameter 2mm
- No holes
Thanks to Abdrx for testing and Picture : see AMR Forum
No over heating of motors have been seen... In winter time ^^
Feel free to comment and remix !
At least 2 wall thickness,