Cheranovsky BITsch-7
| Cheranovsky BITsch-7 | |
|---|---|
 BITsch-7A |
|
| Type: | Experimental airplane |
| Design country: | |
| Manufacturer: | |
| First flight: |
1932 |
| Production time: |
1929-1932 |
| Number of pieces: |
1 |
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The Chyeranovskii Bich-7 ( Russian Черановский БИЧ-7 ; of B oris I wanowitsch sealed eranowski) was a Soviet brushless experimental aircraft . A noticeable feature was the parabolic wing.
development
The designer Boris Iwanowitsch Tscheranowski was concerned with the idea of the parabolic wing since 1921. In 1923 he developed the first BITsch-1 “Parabola” glider designed with such wings, but it was not airworthy. The BITsch-2 followed in 1924, with which successful flights could be carried out. Tscheranowski then equipped the glider with an engine and developed it further into the BITsch-3, which flew for the first time in 1926. The enlarged BITSch-7 was created from this pattern. In contrast to its predecessor, it was designed for two seats and had a modified wing profile. The canvas-covered wooden construction with a unicycle main landing gear had small rudders on the wing tips. When tested in 1929, the model turned out to be a failure, because the responsible test pilot Nikolai Blagin did not succeed in getting it to fly. The BITsch-7 was then thoroughly revised. The landing gear received two main wheels, the open cockpit was covered by a canopy, the shape of the fuselage and wing was changed and the vertical stabilizers on the wing tips were replaced by a conventional one on the rear of the fuselage. As drive a serving Bristol Lucifer - radial engine with 75 kW. The flight test of the model now called BITsch-7A took place in 1932 and was again carried out by Blagin. He criticized the stiff controls, whereupon the ailerons were revised. The following tests showed good flight characteristics, which were adversely affected by strong engine vibrations. Tscheranowski then developed the successor model BITsch-14 from 1934, which was again enlarged and equipped with two M-11 engines , but which again proved to be a faulty design. The BOK-5 , which was created in the office for special constructions in 1937, can be regarded as the direct successor .
Technical specifications
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| Parameter | (BITsch-7A) |
|---|---|
| crew | 2 |
| length | 4.74 m |
| span | 12.24 m |
| height | 2.40 m |
| Wing area | 30.0 m² |
| Wing extension | 5.0 |
| Empty mass | 627 kg |
| Takeoff mass | 880 kg |
| drive | an air-cooled three-cylinder radial engine Bristol Lucifer |
| power | 100 hp (74 kW) |
| Top speed | 165 km / h near the ground |
| Cruising speed | 133 km / h |
| Landing speed | 70-75 km / h |
| Service ceiling | 5000 m |
| Range | 350 km |
See also
literature
- Peter All-Fernandez (ed.): Aircraft from A to Z . Aamsa Quail-Consolidated P2Y. tape 1 . Bernard & Graefe, Koblenz 1987, ISBN 3-7637-5904-2 , p. 413 .
- Cheranovsky BITsch-7A . In: Fliegerrevue . No. 2/228 . Berlin 1972, p. 74 .
Web links
- Черановский БИЧ-7. In: airwar.ru. Retrieved March 6, 2015 (Russian, history, dates, and photos).
Individual evidence
- ↑ Wilfried Copenhagen : Encyclopedia Soviet aviation. Elbe – Dnjepr, Klitzschen 2007, ISBN 978-3-933395-90-0 , p. 282.