The GBA-DARPA Heliplane was a proof-of-concept, long-range, VTOL aircraft intended to cruise at twice the speed of conventional helicopters. It was funded...

aircraft named the Heliplane. The Heliplane was a Cessna 170B with the wings reduced to stubs, and a rotor powered by tip ramjets. DARPA was funding a project...

160,000 lbs. GVW.[citation needed] GBA ArrowHawk – seven seat turboprop gyroplane.[citation needed] GBA-DARPA Heliplane – gyrodyne capable of 400 mph, 1...