06/30/2010. Remarks by Walter van Tilborg: "H.C. Foster of Wexford, Pennsylvania, designed and built this single-seat fully aerobatic homebuilt. The aircraft mainly served as a proof of concept for the geodetic construction of the tapered parasol wing (hence the aircraft is sometimes referred to as Taperwing). Fitted with one 65 hp Continental A65, it was first flown during 1965, but later re-engined with a similar output Lycoming O-145-B2. The aircraft was donated to the EAA Air Museum in 1969, according the EAA it was sold in 1985, its fate is unknown.

The registration N827Z was transferred to a single-seat mid-wing cabin monoplane, designated Airspeed, that was also designed and built by Foster (c/n HCF-4) and was first flown on September 2, 1973."

Span: 20 ft 8 in (6.30 m)
Length: 16 ft 10 in (5.13 m)
Loaded weight: 850 lb (386 kg)
Max speed: 105 mph (169 kmh)
Cruise speed: 90 mph (145kmh)
Landing speed: 56 mph (90 kmh)
Climb: 500 ft (152 m)/min
Service ceiling: 13,000 ft (3,962 m)