Project: Brushed 8.5mm Motor Micro Quadcopter
Different from most mini-quads, these micro-quads do not work with brushless motors that have to be driven by ESCs, but with extremely small and lightweight brushed motors. The big advantage is that these tiny copters can be build very tiny and more importantly very light, making them excellent for indoor flights on rainy days. It also means they’re very crash-resistant as they simply don’t built up the necessary inertia for a devastating crash (devastating to itself and to whatever it crashes into). While there are different approaches to these micro-drones (carbon fibre frames, wood etc.) I elected to go with a 3D printed solution. That is, because one wants these little ones to be as light as possible, the frames do break sometimes, making it very handy if one can simply print and hot-swap the broken frame for a new one after a crash. The copter and its design went through various iterations but has found its current (final) form as you can see below. It now sports a 85mm frame size (which is the smallest possible for ensure a maximum thrust usage if one uses hubsan props and a microscisky FC) and a fx798t cam-combo.
- Microscisky FC brushed Naze 32 FC running Betaflight
- Micromotorwarehouse Insane CL-0820-17 “Dark Edition” 8.5mm motors
- FX FX798T 5.8G 25mW 40CH cam+vtx combo
- Hubsan clear propeller
- 500mah Turnigy 1s batteries
UPDATE: Evidently, some people found my design good enough to “clone” it, violate the GPL it was publicized under and sell it on banggood: