Jane's Encyclopedia of Aviation
Sorrell SNS-7 Hiperbipe (USA)
Two-seat aerobatic biplane, plans and certain components for which are available to amateur constructors.
An unconventional formation shot by JIM LARSEN, depicting the inverted Sorrell Hiperbipe SNS-7 N774HB, flown by Mark Sorrell, in company with US Marine Corps AV-8A Harrier 158963 near Seattle, Washington, in July 1979.
Sorrell Aviation SNS-7 Hiperbipe homebuilt aerobatic biplane (180 hp Lycoming O-360 engine)