TetherGyro
Just a random idea for a flying vehicle ... an autogyro with a tethered glider instead of a rotor. This glider doesn't need a rudder or ailerons because its yaw and roll are defined by the tether. It only needs an elevator to control pitch.
The tether is on a spool to help during launch and landing. Before launch, you "whip" the glider around and gently let out the spool. After landing, you stop the spool to reel in the glider.
Compared to a normal autogyro, a tethergyro can store/transport more compactly since it doesn't have the long double bladed rotor. The large rotor disc diameter may make it more efficient, although I don't know if this really enables anything.
