Bill Wolfe has updated the original drawings for the Spratt Controlwing which was developed by George G. Spratt in 1939 and it was updated regularly over the following forty years with different powerplants. The Contrawing features an engine built into the hull driving a long shaft propeller between a vee-shaped tail. The parasol wings are hinged separately and move automatically to maintain a constant angle of attack in flight. This can be overridden by the pilot with an auxiliary pitch stick. Plans are available from Bill Wolf of Rogers, Arizona.

Registration unknown                                 USA

2 seat flying boat first flown in 1973