Polikarpov I-17
| Polikarpov I-17 | |
|---|---|
|
|
| Type: | Fighter plane |
| Design country: | |
| Manufacturer: |
Plant 39, Plant 21 |
| First flight: |
September 1, 1934 |
| Production time: |
1933-1936 |
| Number of pieces: |
3 prototypes |
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The Polikarpow I-17 ( Russian Поликарпов И-17 ) was a single-seat, Soviet fighter aircraft that did not get beyond the prototype stage. The low-wing aircraft was officially presented at the 15th Paris Air Show in November 1936.
history
The development of the Polikarpow I-17 began in 1933 in the Polikarpow experimental design office under the direction of Nikolai Nikolajewitsch Polikarpows . After a year of development, the first prototype with the designation ZKB-15 flew on September 1, 1934. The aircraft was built at Zavod (Plant) No. 39 and reached a top speed of 455 km / h , powered by an 800 hp Hispano-Suiza 12Y (HS 12Y). The pilot of the first flight was Valeri Pavlovich Tschkalow , a later bearer of the Order of Hero of the Soviet Union . The aircraft has been in the Chkalov Museum since 1940.
Although the flight performance of the machine was at a high level, it did not achieve the goal set by the developers themselves of a top speed of 500 km / h. Therefore, in the spring of 1935, testing of a second machine with the designation ZKB-19 began, which was built in Sawod No. 21 and flown again from Tschkalow. Differences to the first prototype consisted of the construction of the landing gear , the shape of the aircraft nose, shorter ailerons and the installation of buoyancy aids . This machine was presented at the 15th Paris Air Show in 1936. In 1937 it was exhibited again in Milan, with the machine being declared as a sport aircraft in both cases .
Equipped with a 750 hp Klimow M-100 (a Soviet license replica of the HS 12Y), the ZKB-19 reached a top speed of 500 km / h and a peak altitude of 9700 meters. Like the first prototype, the aircraft was equipped with four 7.62 mm SchKAS machine guns within the leading edge of the wing, which were removed again for the exhibitions in Paris and Milan. The whereabouts of this machine after the end of the test flights is not known.
At the end of 1936, the developers began testing a third prototype called the ZKB-19bis. The aircraft had its first flight on November 12, 1936, flown by K. K. Popow. The changes between the second and third prototype were significantly less than when switching from the first to the second prototype. One difference was that the roof of the cockpit of the third prototype consisted of two parts and the armament consisted of two 7.62 mm SchKAS machine guns in the wings and a 20 mm SchWAK cannon firing through the propeller .
Further prototypes with the designations ZKB-33, ZKB-25 and ZKB-43 were planned, but were not completed. The I-17Z, intended as a parasite hunter for the Sweno project, with its wing area enlarged by nine square meters, was also not implemented .
Technical specifications
| Parameter | ZKB-15 | ZKB-19 | ZKB-19bis |
|---|---|---|---|
| span | 10.0 m | ||
| length | 7.4 m | 7.365 m | 7.425 m |
| Wing area | 17.65 m 2 | ||
| Empty mass | 1,350 kg | 1,560 kg | 1,465 kg (later 1,533 kg) |
| Takeoff mass | 1,823 kg | 1,916 kg | 1,950 kg (later 2,020 kg) |
| drive | Hispano-Suiza 12Ybrs | Klimow M-100 | |
| cooling | Water cooling | ||
| Top speed | 455 km / h at an altitude of 3,380 m | 500 km / h | |
| Ascent time to 5,000 m | 6.5 min | 7.2 min | - |
| Summit height | - | 9,700 m | - |
| Range | - | 800 km | - |
| Armament | four 7.62 mm MG SchKAS | 7.62 mm MG SchKAS, 20 mm SchWAK cannon |
|
| crew | 1 | 1 | 1 |
Web links
- avia.russian.ee: Polikarpov I-17 ( Memento from July 4, 2007 in the Internet Archive ) (English)
- mig3.sovietwarplanes.com: Polikarpov I-17 (English)
Individual evidence
- ↑ Aerosport 11/1969, column Who? When? What? , P. 476