Festo SmartInversion: RC Robotic Derigible that Flies by Flipping Itself in Mid Air

Festo SmartInversion -- flying geometrical band with inversion drive

SmartInversion is a helium-filled flying object that moves through the air by turning inside-out. This constant, rhythmically pulsating movement is known as inversion and gives the flight model its name.

Further information: http://www.festo.com/en/smartinversion