ZAGI 2-EA
| ZAGI 2-EA | |
|---|---|
| Type: | Gyroplane |
| Design country: | |
| Manufacturer: | |
| First flight: |
1930 |
| Number of pieces: |
1 |
.svg){kind=small}
ZAGI 2-EA ( Russian ЦАГИ 2-ЄА ) was a Soviet gyroplane . It was created at the beginning of the 1930s in the development department for special designs at ZAGI and was intended to research the structural and aerodynamic conditions of gyroscopes. One copy was built.
history
In 1929 the first Soviet autogyro KASKR was tested and in the autumn of the next year work began on the successor 2-EA under the main direction of Alexei Cheryomukhin . I. P. Bratuchin and W. A. Kuznetsov were directly responsible for the construction . Later its was also incorporated into the layout helicopter constructions become known M. L. Mil .
The fuselage, the rotor arm and the rotor spars were made of welded chrome - molybdenum steel tubes. The stub wings with their ends bent upwards by 35 ° consisted of a wooden frame covered with fabric. The vertical tail consisted of two right and left of abgestrebten tailplane mounted end plates. A Gnôme-Rhône-Titan engine served as the drive , which simultaneously set the rotor turning through its air flow. The broad-gauge main landing gear was rigid. There was a grinding spur at the stern.
The flight tests began in the autumn of 1930 with the ZAGI test pilot Korsinschtschikow. It revealed some design weaknesses, in particular the rotor blade vibrations that had already occurred with the KASKR. The errors could be eliminated and the experiences made with the 2-EA flowed into the subsequent gyroplane designs of the ZAGI. The 2-EA itself, however, was handed over to the “Maxim Gorki” propaganda squad, where it was used until the end of the engine operating life.
Technical specifications
| Parameter | Data |
|---|---|
| Manufacturer | OOK-ZAGI |
| Constructor (s) | Bratuchin, Kuznetsov |
| crew | 2 |
| Rotor circle diameter | 12 m |
| Rotor speed | 146 rpm |
| span | 6.73 m without rotor |
| length | 6.29 m without rotor |
| height | 3.91 m |
| Wing area | 5.36 m² |
| Empty mass | 755 kg |
| Takeoff mass | 1030 kg |
| drive | an air-cooled 5-cylinder radial engine Gnôme-Rhône Titan |
| Starting power | 224 hp (165 kW) |
| Top speed | 160 km / h |
| Minimum speed | 58 km / h |
| Rise time | 20 min at 3000 m |
| Summit height | 4200 m |
| Range | 250 km |
| Flight duration | 1 h |
| Take-off / landing route | 50-60 m / 0-6 m |
literature
- Vladimir B. Kazakov: perpendicular to the sky . In: Aviator Calendar of the GDR 1989 . ISBN 3-327-00520-6 .
- G. L .: Who? When? What? In: Fliegerrevue . No. 3/349 , 1982, pp. 140 .