So this is an autogyro. It may look like a helicopter but it's waaaaay weirder. The top propellor is unpowered and only spins due to side winds created by the rear propellor.  As the top propellor picks up speed, the tiny aircraft takes off like an airplane with some wildy confusing physics. I really don't get it. 

Check out this video of a 95 year old RAF veteran flies his craft like only a confident 95 year old could. 



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