ZAGI A-12
| ZAGI A-12 | |
|---|---|
| Type: | Gyroplane |
| Design country: | |
| Manufacturer: | |
| First flight: |
May 27, 1936 |
| Number of pieces: |
1 |
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ZAGI A-12 ( Russian ЦАГИ А-12 ) refers to a Soviet gyroplane from the 1930s.
development
In 1930, a test department for the research and construction of aircraft and helicopters was founded in the Central Aerohydrodynamic Institute (ZAGI). In 1935, the designers Nikolai Skrschinski and Mikhail Mil, who later became known for his helicopter designs, developed the high-speed gyroplane A-12, which was supposed to reach 350 km / h. That is why the type was given a spindle-shaped fuselage shape in half-shell construction, which was based on that of the fighter aircraft of that time. The rigid main wheels were given aerodynamic panels. For the first time, the stabilizing wings were omitted from a Soviet gyroplane design. A 650 HP radial engine M-25 served as drive . In order to compensate for the torque of the rotor, the right horizontal stabilizer received a negative profile.
On May 10, 1936, ZAGI test pilot Tschernawski began flight tests with a few short hops. The first ten minute flight took place on May 27th. On the next flight, Chernavsky stayed in the air for 55 minutes and reached an altitude of 2000 meters. In the course of a year there were 43 test flights with a total flight time of 17 hours and 55 minutes. On May 23, 1937, the pilot Korsyrov, who had meanwhile joined the program, crashed fatally with the A-12. A rotor blade broken due to material fatigue was found to be the cause. The tests with the A-12 were then discontinued.
Technical specifications
| ZAGI A-12 | ЦАГИ А-12 |
|---|---|
| Manufacturer | ZAGI |
| Constructor (s) | Nikolai Scrschinsky, Michael Mil |
| crew | 1 pilot |
| Rotor circle diameter | 14 m |
| span | 3.35 m (tail unit) |
| length | 6.74 m (hull) |
| height | 4.1 m |
| Empty mass | 1343 kg |
| Takeoff mass | 1687 kg |
| drive | an air-cooled 9-cylinder radial engine M-25 |
| Starting power | 490 kW (650 hp) |
| Top speed | 245 km / h |
| Minimum speed | 52 km / h |
| Summit height | 5570 m |
| Take-off / landing route | 25 m / 10 m |
See also
literature
- Vladimir B. Kazakov: perpendicular to the sky . In: Aviator Calendar of the GDR 1989 . ISBN 3-327-00520-6 .
Individual evidence
- ↑ Bruce H. Charnov: From Autogiro to Gyroplane , Praeger, Westport Connecticut 2003, ISBN 1-56720-503-8 , p. 201