ZAGI A-8
| ZAGI A-8 | |
|---|---|
| Type: | Experimental gyroplane |
| Design country: | |
| Manufacturer: | |
| First flight: |
June 29, 1934 |
| Number of pieces: |
2 |
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The ZAGI A-8 ( Russian ЦАГИ А-8 ) was a Soviet gyroplane . It was created in 1934 in two copies as a further development of the ZAGI A-6 .
history
W. A. Kuznetsov developed the A-8 as a direct successor to the A-6, but modified it fundamentally. The wings were given a bend at the level of the landing gear suspension with a 5 ° V position. The upwardly angled outer wings of the earlier ZAGI gyroplanes had been left out. The chassis was equipped with hydropneumatic shock absorbers (the first to be developed in the Soviet Union). The most striking change, however, was the adjustable rotor angle, which made it possible to support the control of the gyroplane by changing the inclination of the rotor.
At the same time, a second copy of the A-8 was built, which was equipped with a V-tail, but was otherwise identical. It had slightly better performance parameters (higher takeoff weight, better minimum and maximum speed) than the model with a normal tail unit.
On June 29, 1934 the first flight was carried out by S. A. Korsinschtschikow. The control via the adjustable rotor head resulted in no problems and proved to be more effective than via the normal elevator and rudder. With this innovation, the stub wings could be omitted from the following models. The next design by Kuznetsov, the ZAGI A-14 from 1935, was therefore completely wingless except for a braced horizontal stabilizer.
On August 18, 1934, the A-8 was publicly demonstrated at the 2nd air parade in Tuschino .
Technical specifications
The values in brackets refer to the A-8 with V-tail
| ZAGI A-8 | ЦАГИ А-8 |
|---|---|
| Manufacturer | ZAGI |
| Constructor (s) | W. A. Kuznetsov |
| crew | 2 |
| Rotor circle diameter | 11 m |
| Rotor speed | 187 / min |
| span | 6.5 m without rotor |
| length | 6.17 m without rotor |
| height | 3.2 m |
| Wing area | 5.9 m² (5.8 m²) |
| Empty mass | 595 kg (620 kg) |
| Takeoff mass | 837 kg (860 kg) |
| drive | an air-cooled 5-cylinder radial engine Schwezow M-11 |
| Starting power | 73.5 kW (100 PS) |
| Top speed | 142 km / h (147 km / h) |
| Minimum speed | 48 km / h (45 km / h) |
| Rise time | 20 min at 3000 m altitude |
| Summit height | 2260 m |
| Flight duration | 2.5 h |
| Takeoff route | 40-50 m |
literature
- Vladimir B. Kazakov: perpendicular to the sky . In: Aviator Calendar of the GDR 1989 . ISBN 3-327-00520-6 .
Web links
ЦАГИ А-8. Retrieved May 6, 2019 (Russian).
Individual evidence
- ^ Karl-Heinz Eyermann , Wolfgang Sellenthin: The air parades of the USSR. Central Board of the Society for German-Soviet Friendship, 1967. p. 31.