Awesome Airplane - The Kalanin K-&


Kalinin K-7 was a heavy experimental aircraft designed and tested in the Soviet Union in the early 1930s. K-7 was of unusual configuration with twin booms and large underwing pods housing fixed landing gear and machine gun turrets.

K-7 first flew on 11 August 1933. Then on 21 November 1933 the aircraft crashed due to structural failure of one of the tail booms, killing 14 people aboard and one on the ground. Although two more prototypes were ordered in 1933, the project was canceled in 1935 before they could be completed.

General characteristics

Crew: minimum 11
Capacity: 120 passengers in civilian configuration
Length: 28 m (91 ft 10 in)
Wingspan: 53 m (173 ft 11 in)
Height: (?)
Wing area: 454 m² (4,886.8 ft²)
Empty weight: 24,400 kg (53,793 lb)
Loaded weight: 38,000 kg (83,776 lb)
Powerplant: 7× Mikulin AM-34F V-12 piston engines, 560 kW (750 hp) each


Maximum speed: 225 km/h (121 knots, 140 mph)
Service ceiling: 4,000 m (13,123 ft)
Wing loading: 84 kg/m² (17 lb/ft²)
Power/mass: 103 W/kg (0.06 hp/lb)

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