Imp Engine: 1 x 80hp Armstrong-Siddeley Genet II Max take-off weight: 599 kg / 1321 lb Empty weight: 386 kg / 851 lb Wingspan: 7.77 m / 26 ft 6 in Length: 6.45 m / 21 ft 2 in Height: 2.33 m / 8 ft 8 in Wing area: 16.35 sq.m / 175.99 sq ft Max. speed: 164 km/h / 102 mph Cruise speed: 128 km/h / 80 mph Crew: 2