To do this, he added four servos on each arm of the quad, giving each rotor collective pitch, just like the tail rotor of a real helicopter. The result is a quadcopter that can fly upside-down ...

They say that drummers make the best helicopter pilots ... which translates control inputs into both collective and cyclical changes in the angle of attack of the rotor blades.

Moving the helicopter is done with the controls inside of the helicopter: the Collective, the Cyclic and the Tail Rotor pedals. The Pave can also be folded up and fit inside of a larger plane for ...