Kalinin K-1
| Kalinin K-1 (RWS-6) | |
|---|---|
|
|
| Type: | Airliner |
| Design country: | |
| Manufacturer: |
ChAI / RWS |
| First flight: |
July 26, 1925 |
| Number of pieces: |
5 |
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The Kalinin K-1 ( Russian Калинин К-1 ) was a Soviet passenger aircraft that could carry three people. However, it had a rather weak engine and was therefore only built in a few copies.
development
Konstantin A. Kalinin began work on the K-1 in 1925 at the Kharkiv Aviation Institute . Kalinin's closest collaborators at the time included D. L. Tomaschewitsch , A. N. Grazianski and A. T. Rudenko. The first construction plans were drawn up by Kalinin as early as 1923, when the Ukrainian airline Ukrwosduchput, after the opening of the first regular flight connection from Moscow to Nizhny Novgorod, requested a cheap, robust and easily serviceable aircraft for further expansion plans. The construction took place in the Kiev repair aircraft factory , which is why the K-1 was also referred to as RWS-6 (Remwosduchsawod-6 = repair aircraft factory 6). The first flight took place on April 20, 1925 or, according to another source, on July 26, 1925. The factory tests are said to have taken place in the summer of 1925 and in September of the same year the state acceptance for civil aviation took place in Moscow. During the tests, the K-1 is said to have reached a speed of 191 km / h with a full load at an altitude of 3000 meters.
The type was mainly used as a passenger aircraft, later as a medical aircraft (see K-3) and, since it was able to transport 400 kg of chemicals, also in agriculture . Five copies were made in Minsk . Successors were the K-2 , K-3 , K-4 and finally the Kalinin K-5, which was produced in 290 copies .
construction
The K-1 was a braced shoulder wing aircraft with an elliptical , three-part wing. The rectangular fuselage consisted of a tubular steel frame , planked with light metal in the front area up to the end of the passenger cabin and covered with fabric in the rear. The middle section of the wing was formed by a tubular steel frame, while the outer wings were made of wood and covered with fabric. It was supported on each side of the fuselage by two tubular steel struts that ran parallel to each other and were covered with plywood . The horizontal stabilizer was also designed as an ellipse and consisted of a wooden structure covered with fabric. The vertical stabilizer was also covered with fabric, but was made of tubular steel. The chassis consists of the main wheels connected to an axle and a grinding spur at the rear.
Technical specifications
| Parameter | Data |
|---|---|
| crew | 1 |
| Passengers | 3 |
| length | 10.72 m |
| span | 16.76 m |
| Wing area | 40.00 m² |
| Wing extension | 7th |
| Preparation mass | 1452 kg |
| payload | 520 kg |
| Takeoff mass | 1972 kg |
| Wing loading | 49.3 kg / m² |
| Power load | 12.3 kg / hp |
| Engine | 1 liquid-cooled nine - cylinder in - line engine Salmson RB-9 with rigid two-bladed wooden propeller |
| power | 127 kW (approx. 170 PS) |
| Fuel volume | 170 kg |
| Top speed | 160 km / h close to the ground |
| Cruising speed | 130 km / h |
| Landing speed | 70 km / h |
| Take-off run | 120 m |
| Landing runway | 180 m |
| Climbing time to 1000 m | 12.3 min |
| Service ceiling | 3000 m |
| Range | 600 km |
See also
literature
- Heinz AF Schmidt: Historical Airplanes Part II . Motor book, Stuttgart 1970.
- Heinz A. F. Schmidt: Soviet planes . Transpress , Berlin, p. 53 .
- Wilfried Copenhagen : Lexicon Soviet Aviation. Elbe – Dnjepr, Klitzschen 2007, ISBN 978-3-933395-90-0 .
- Iwan I. Rodionow, Jürgen Freytag: A Soviet Legend - Alexandrow / Kalinin AK-1 . In: Model making today . No. 06 , 1989, ISSN 0323-312X , p. 21/22 .
Web links
- Калинин К-1. Retrieved August 3, 2018 (Russian).