Yakovlev I-28
| Jakowlew I-28 (Jak-5) | |
|---|---|
| Type: | Fighter plane |
| Design country: | |
| Manufacturer: | |
| First flight: |
December 1, 1940 |
| Commissioning: |
only prototype |
| Production time: |
1940 |
| Number of pieces: |
1 |
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Jakowlew I-28 ( Russian Яковлев И-28 ) was the prototype designation of a Soviet fighter aircraft of the 1940s. The abbreviation Jak-5 was intended as the serial designation.
development
In 1940, parallel to the testing of the Jak-1 , the planning work for a high altitude fighter, which was to operate at 8,000 to 10,000 meters, began in OKB Jakowlew. It was thus in direct competition with the I-200 from Mikoyan-Gurevich, which was in the development phase at the same time . The V-motor M-105P developed by Vladimir Klimov was selected as the drive . So that it could achieve the necessary high-altitude performance, it was equipped with the two-stage Je-100 exhaust gas turbocharger from W. A. Doleschal. The essential assemblies came from a Jak-1 of the 28th series, which is why the abbreviation I-28 (I for Istrebitel / Истреби́тель, fighter aircraft) was chosen, although this designation was already on another hunter project had been awarded. The armament consisted of a shvak cannon - machine gun and two SchKAS - machine guns .
The construction phase began in mid-1940 and towards the end of the year the prototype made its first flight. Although the I-28 reached a speed of 665 km / h during the tests at an altitude of 10,000 meters and the engine also performed more consistently than the M-35A used in the MiG-1 , it proved to be suitable for the different altitudes In contrast to the Jak-1, I-28 is around 100 kg heavier than too weak. In addition, the loader, which did not work reliably, caused constant problems. The tests were continued until 1942 after the outbreak of the war , but finally ended, because as the aerial battles continued it became clear that an altitude fighter was not required against the German aircraft operating at medium altitudes.
The designation Jak-5, which had become available again due to the discontinuation of production, was reassigned in 1944 for a single-seat further development of the UT-2 , which however also did not reach series production.
Technical specifications
| Parameter | Data |
|---|---|
| crew | 1 |
| span | 9.74 m |
| length | 8.48 m |
| height | 2.42 m |
| Wing area | 17.15 m² |
| Empty mass | 2,450 kg |
| Takeoff mass | 2,928 kg |
| drive | a twelve-cylinder - V-engine Klimov M-105 PD |
| power | 1,160 PS (853 kW) |
| Top speed | 650 km / h at an altitude of 9,000 m 665 km / h at an altitude of 10,000 m |
| Summit height | 12,000 m |
| Range | 820 km |
| Armament | one rigid 20 mm MK SchWAK two rigid 7.62 mm MG SchKAS |
literature
- Wilfried Bergholz: Russia's great aircraft manufacturer . Jakowlew, Mikojan / Gurewitsch, Suchoj. Aviatic, Oberhaching 2002, ISBN 3-925505-73-3 , p. 37 .
- Manfred Jurleit: Jakowlew I-28 (Jak-5) . In: Fliegerrevue . No. 12/1981 , p. 566 .
Web links
- Yakovlev Yak-5 (I-28) - high-altitude fighter. In: aviastar.org. Retrieved February 4, 2016 .
- I-28 (Yak-5 1940, I-26V, I-28N, I-28V, aircraft '28') by ASYakovlev. In: ram-home.com. Retrieved February 4, 2016 .
- Yakovlev Yak-5 (I-28). In: wardrawings.be. Retrieved February 4, 2016 .
Individual evidence
- ^ Ulrich Unger: A. S. Jakowlew - his sport and training aircraft. In: Fliegerrevue No. 2/1981, p. 71