Ernst Heinkel initiated as a private venture the He 176, which was designed by Siegfried and Walter Gunter specifically for rocket propulsion. The span and area apply to the open cockpit, fixed undercarriage first prototype as originally designed; larger wings were fitted before the first flight. The speed and endurance of approx 171 mph (275 kph) and 50 sec. are those achieved on the first flight on 20 June 1939 powered by a 5.89kN Walter HWK-R1 203 liquid fuel rocket motor, although much better performances were achieved later.
The He 176 was demonstrated before senior German officials early in July 1939. They remained unconvinced of the potential of rockets for aircraft propulsion. The more advanced second prototype, with enclosed cockpit and retractable landing gear was never built.
Engine: One Walter HWK R 1-203 rocket, 1,323 lb (600 kg) thrust.
Wing span: 16 ft 4.75 in (5.00 m)
Length: 17 ft 0.75 in (5.20 m).
Height: 1.4 m / 4 ft 7 in
Wing area: 58.12 sq.ft (5.40 sq.m)
Gross weight: approx 3,530 lb (1600 kg).
Empty weight: 900 kg / 1984 lb
Max. speed: 750 km/h / 466 mph
Cruise speed: 700 km/h / 435 mph
Ceiling: 9000 m / 29550 ft
Range: 95 km / 59 miles