Cycloidal rotor drone.
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Previously:
https://www.homemadetools.net/forum/...844#post186784
https://www.homemadetools.net/forum/...284#post169311
https://www.homemadetools.net/forum/...340#post154404
https://www.homemadetools.net/forum/...189#post149877
https://www.homemadetools.net/forum/...048#post137966
https://www.homemadetools.net/forum/...068#post138029
