RC Helicopter Main Rotor Pitch Gauge
Available in three versions
Larger Angle finder: 59x59x25
Small Angle finder:36x36x20
Two washers between 3~5mm
Magnet size for Small Angle finder: 20x5x2
Rubber band
https://fb.watch/Askbd8IeRH/ (assembly video)
The author marked this model as their own original creation.