Sukhoi Su-9 (1947)
| Sukhoi Su-9 (K) | |
|---|---|
| Type: | Fighter plane |
| Design country: | |
| Manufacturer: | |
| First flight: |
November 13, 1946 |
| Commissioning: |
- |
| Production time: |
1945/1946 |
| Number of pieces: |
1 |
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The Sukhoi Su-9 ( Russian Сухой Су-9 , project designation K , NATO code name Type 8 ) was a Soviet fighter aircraft for the front area. It was the first jet aircraft developed by OKB Sukhoi .
This machine looked similar to the Messerschmitt Me 262 , but only had the engines in common. It was a twin-engine low-wing aircraft with an oval fuselage and was made of metal, had trapezoidal wings and a braking parachute. The nose wheel had double tires.
history
The Su-9 was built in 1945/46 at the request of the armed forces from 1945. The aim was to catch up as quickly as possible in the case of aircraft with jet engines . Since their own engines were not yet available, the aircraft were designed for replicas of German engines. Jakowlew built an air jet engine RD-10 ( Jumo 004 ) into his proven Jak-3 instead of the piston engine in the nose of the fuselage and thus created the Jak-15 . The MiG-9 was a new design and had two RD-20 ( BMW 003 ) in the fuselage bow. With a view to the short service life of the RD-10 engines, Suchoi decided to install them under the wings in a more maintenance-friendly manner. This left enough space in the fuselage for large fuel tanks for the fuel-intensive engines. Messerschmitt, Heinkel and Gloster also went the same way with the development of their first jet fighter, the Me 262 , the He 280 or the Meteor .
The seating position above the wings leads to a certain visual similarity to the Me 262. On closer inspection, however, the Su-9 has nothing in common with it. For example, due to a lack of Soviet experience in aerodynamics in the high-speed range, it only has trapezoidal and no swept wings like the Me 262 (the He 280 and the British Meteor also did not have swept wings ). But the shape of the fuselage and the landing gear also make a significant difference between the machines. The Me 262 has a triangular fuselage cross-section, the Su-9 a circular one.
The Su-9 showed better flight performance than the Me 262 despite the wings, which were rather unsuitable for high speeds. At almost identical weight (the Su-9 was about 300 kg lighter with a curb weight of 4060 kilograms), it was somewhat smaller, but flew 100 Kilometers further and 600 meters higher than the Me 262. The maximum speed was also higher and was 885 km / h at an altitude of 8,000 meters (Me 262: 869 km / h at an altitude of 6,000 meters).
The Su-9 was armed with a 37 mm NR-37 cannon and two 23 mm NS-23 cannons.
The prototype had an ejection seat , a braking parachute and hydraulic control, which was a groundbreaking novelty for a hunter. The fuselage was a metal half-shell construction. The prototype first flew on November 13, 1946 and was presented to the population on August 3, 1947 during the air parade in Tuschino .
The machine came too late for series production. When it was ready for use at the end of 1947, the MiG-9 and Jak-15 were already being built in series. The beginning of a replica of more modern British engines made it possible to equip aircraft with more powerful and more stable engines than the now outdated replicas of German engines. This led to the further development of the Su-9 over the Su-11 to the Su-13. Since the successor model Su-11 (Project KL), not to be confused with the Sukhoi Su-11 , which carried the NATO code Fishpot , promised better performance with its Ljulka TR-1 engines developed in the Soviet Union , the Project Su-9 was discontinued. The development of the Su-11 was then not pursued further in favor of the improved Su-13 with the replica of the British Rolls-Royce Derwent RD-500 engines due to the aerodynamic knowledge that had been collected in the meantime and the unreliability of the engines . The Su-13, in turn, was no longer tested due to the start of production of the MiG-15 , Jak-23 and Il-28 . The Sukhoi design office was also dissolved quite arbitrarily in November 1949, so that testing could no longer take place.
Technical specifications
| Parameter | Data |
|---|---|
| Manufacturer | OKB Sukhoi |
| Year of construction (s) | 1945/46 |
| length | 10.55 m |
| Wingspan | 11.20 m |
| Wing area | 20.2 m² |
| Empty mass | 4,060 kg |
| Takeoff mass | 6,100 kg |
| Wing loading | 315.8 kg / m² |
| Power load | 2.52 kg / kp |
| drive | two RD-10 |
| power | 8.9 kN each |
| Top speed | 847 km / h near the ground 895 km / h at an altitude of 8,000 m |
| Marching speed | 657 km / h |
| Rate of climb | 1,200 m / min |
| Service ceiling | 12,250 m |
| Range | 1,140 km |
| crew | 1 pilot |
| Armament | two 23 mm MK NS-23 one 37 mm MK NR-37 |
literature
- Heinz A. F. Schmidt: Soviet planes . Transpress , Berlin, p. 138 .
- Karl-Heinz Eyermann : Jet-powered Soviet experimental aircraft . In: Wolfgang Sellenthin (Ed.): Deutscher Fliegerkalender 1968 . German Military Publishing House, Berlin 1967, p. 190/191 .