Sukhoi Su-9 (K)


Displaying a close conceptual similarity to the Messerschmitt Me 262, the Su-9 single-seat fighter, also known as Samolet (Aircraft) K, entered flight test in the autumn of 1946. Of all-metal construction with a semi-monocoque, oval-section fuselage and single-spar wings, the Su-9 had an armament of one 37mm and two 23mm cannon, and was powered by 1,984 lb.s.t. (900 kgp) RD-20 turbojets (based on Junkers Jumo 004B turbojets). The Su-9 embodied a number of innovatory features including hydraulically-boosted control surfaces, a cordite-fired ejection seat, a variable-incidence tailplane, provision for assisted take-off rockets and a braking parachute. Racks under the centre fuselage permitted carriage of one 500kg or two 250kg bombs. The Su-9 was shown publicly over Tushino on 3 August 1947. It was subsequently claimed a 559-m.p.h. (900-km h) maximum speed was attained.

With completion of State testing in the following December, series production was recommended. However, although possessing no more than a superficial resemblance to the Me 262, its configurational similarity to the German fighter was a stigma which led Yosif Stalin to reject the Su-9 out of hand.


Su-9 ('K')

Engines: 2 x 1,984 lb.s.t. (900 kgp) RD-20 turbojet
Max take-off weight: 6380 kg / 14066 lb
Empty weight: 4060 kg / 8951 lb
Wingspan: 11.21 m / 37 ft 9 in
Length: 10.57 m / 35 ft 8 in
Height: 3.72 m / 12 ft 2 in
Wing area: 20.24 sq.m / 217.86 sq ft
Max. speed: 900 km/h / 559 mph
Range: 1140 km / 708 miles

Sukhoi Su-9 (K)