Jakowlew Jak-25 (1947)
| Yakovlev Yak-25 | |
|---|---|
| Type: | Fighter plane |
| Design country: | |
| Manufacturer: | |
| First flight: |
1947 |
| Number of pieces: |
2 |
.svg){kind=small}
Jakowlew Jak-25 ( Russian Яковлев Як-25 ) is the name of a Soviet front-line fighter. It was created shortly after the Second World War in a series of similar test models to test the jet engines that were just emerging at the time . Since this model did not get beyond the prototype stage, the designation was given again to a twin-engine aircraft in 1953, see Jakowlew Jak-25 .
history
This pattern was a direct result of the Jak-19 and was identical to it, apart from the more powerful engine and armament. Since the pilots of the Yak-23, which was already in service, criticized the poor visibility caused by the rear cabin, the cockpit was moved far forward.
The aircraft was made of metal and had a trapezoidal wing in a middle-decker arrangement, the tail unit was swept. The struts of the main landing gear could be pulled into the wing, the main wheels and the nose wheel drove into the fuselage.
Two prototypes with the designations Jak-25 / I and the Jak-25 / II equipped with additional fuel tanks at the wing tips were created . Flight testing began in 1947 and was carried out by Sergei Anochin .
Since the MiG-15 had proven to be a forward-looking jet-powered fighter with swept wings, testing of the Jak-25 was discontinued in its favor.
In 1948, the two machines were still tested with a tandem chassis with support wheels on the wing tips. A Jak-25 was used in the “Burlaki” (Бурлаки, Treidler ) project . The aircraft was pulled behind a Tu-4 as a parasite hunter with the engine switched off . In the event of an encounter with opposing fighters, the engine should be started, the Jak-25 should detach from the rope and defend the bomber. It remained with attempts.
Technical specifications
| Parameter | Data |
|---|---|
| Conception | Front fighter |
| crew | 1 |
| span | 8.88 m |
| length | 8.65 m |
| height | 3.30 m |
| Wing area | 14.00 m² |
| Empty mass | 2,285 kg |
| Takeoff mass | 3,580 kg |
| Top speed | 972 km / h at an altitude of 3,000 m |
| Rise time | 2.6 min at 5,000 m |
| Summit height | 15,200 m |
| Range | 1,445 km |
| drive | an RD-500 |
| power | 15.6 kN |
| Armament | three 23 mm MK NR-23 |
literature
- Wilfried Bergholz: Russia's great aircraft manufacturer . Jakowlew, Mikojan / Gurewitsch, Suchoj. The complete type book. Aviatic, Oberhaching 2002, ISBN 3-925505-73-3 , p. 58 .
- Karl-Heinz Eyermann : Jet-powered Soviet experimental aircraft . In: Wolfgang Sellenthin (Ed.): Deutscher Fliegerkalender 1968 . German Military Publishing House, Berlin 1967, p. 204/205 .
Web links
- Яковлев Як-25 (Первый). Retrieved October 22, 2016 (Russian).
Individual evidence
- ↑ Konstantin Kosminkow: The beginning of the Soviet era . In: Fliegerrevue Extra . No. 17 , 2007, p. 46-47 .