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 A-65, 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)