Yakovlev Yes-7
| Yakovlev Ja-7 (AIR-7) | |
|---|---|
.jpg) The Ja-7 on a 1937 postage stamp |
|
| Type: | Record aircraft |
| Design country: | |
| Manufacturer: | |
| First flight: |
1932 |
| Commissioning: |
Flight tests ended in 1934 |
| Number of pieces: |
1 |
.svg){kind=small}
Jakowlew Ja-7 ( Russian Яковлев Я-7 , also AIR-7 , АИР-7) was the name of a two-seat record aircraft.
history
After the success with the school and sport aircrafts AIR-1 to AIR-6, the Yakovlev collective set itself the demanding task of building a two-seater aircraft that, with the same engine, should be faster than the single-seater fighter aircraft in use. A low-wing aircraft with a closed cabin and covered landing gear was designed. The M-22 engine was disguised with a Townend ring . The fuselage was a covered tubular steel construction, the wing was made of metal, had a very thin profile (8% thickness) and was partially covered with fabric. The struts and tensions were profiled. Construction of the aircraft began in April 1932 and the aircraft was ready to fly by summer. On November 19, the set speed target (325 km / h) was reached, in the spring of the following year even 332 km / h was achieved. The flight tests continued until 1934. A momentous incident occurred when an aileron tore off in flight due to the phenomenon of flutter, which was still little researched at the time . The test pilot J. I. Piontkowski managed to land the damaged machine. During the examination of the machine, the construction of the rudder suspension was assessed as defective. A. S. Yakovlev was blamed and disgraced.
Technical specifications
| Parameter | Data |
|---|---|
| Construction year | 1932 |
| constructor | Alexander Sergejewitsch Jakowlew |
| crew | 2 |
| Wingspan | 11.00 m |
| length | 7.80 m |
| Wing area | 19.4 m² |
| Empty mass | 900 kg |
| Payload | 500 kg |
| Takeoff mass | 1400 kg |
| Wing loading | 72 kg / m² |
| Power load | 2.9 kg / hp |
| Engine | a 9-cylinder radial engine M-22 |
| Starting power | 353 kW (480 hp) |
| Top speed | 332 km / h |
| Landing speed | 110 km / h |
| Range | 1300 km (5 hours flight time) |
Fighter aircraft Ja-7
The prototype of the Jakowlew Jak-7 fighter aircraft from 1940 also had the abbreviation Ja-7.
See also
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. 21 .
- Wilfried Copenhagen , Jochen K. Beeck: The large aircraft type book . Motorbuch, Stuttgart 2005, ISBN 978-3-613-02522-6 , p. 446 and 732/733 .
- Heinz A. F. Schmidt: Soviet planes . Transpress, Berlin 1971, p. 161 .