M-86 - Soviet aviation star-shaped 14-cylinder piston engine. It was a boosted M-85 engine (licensed copy of the French motor Gnome-Ron "Mistral Major" 14Kdrs ( en: Gnome-Rhône Mistral Major ).
| M-86 | |
|---|---|
| Manufacturer | Plant No. 29 (Zaporozhye) |
| Years of production | 1937-1939 |
| Specifications | |
| Volume | 38.65 L |
| Power | 800/950 hp |
| Compression ratio | 5.5 |
| Bore | 146 mm |
| Piston stroke | 165 mm |
| Number of cylinders | 14 |
| Compressor | single speed monitoring station |
| Fuel system | carburetor |
| Fuel type | leaded gasoline 2B-78, 3B-74, B-95 |
| Cooling system | air cooling |
| Dimensions | |
| Dry weight | 61 0 kg |
Content
History
In 1933, during the trip of the Soviet delegation of engine builders to France, an agreement was reached on technical assistance in the development of engines: the 9-cylinder 9K Mistral (Soviet designation M-75) and the 14-cylinder 14K Mistral Major (Soviet designation M-85 ) The contract provided for the supply of components for the first series of engines, as well as the internship of 15 Soviet engineers at the Gnom-Ron plant in France. In 1934, acceptance of technical documentation and sample engines began.
For 1935, the M-85 engine, according to its technical data, was already somewhat outdated, so for the modernization of the engine in 1935 OKB-29 was formed under the leadership of A.S. Nazarova. In 1936, OKB-29 designed the boosted version of the M-85 under the designation M-85F. The engine was launched in series at the factory number 29 in Zaporozhye in April 1937 under the designation M-86. They stopped producing the M-86 in 1939. A total of 548 M-86 engines were manufactured.
Design
The M-86 engine was a 14- cylinder two - row star - shaped four - stroke piston air-cooled engine . The M-86 engine was a forced version of the M-85 engine, which was a licensed copy of the 14Kdrs Gnome-Ron French Mistral Major motor ( en: Gnome-Rhône Mistral Major ).
The engine was boosted by boost due to a change in the supercharger drive. Due to increased loads, changes were made:
- the crank mechanism was strengthened;
- increased ribbing of the liners;
- reinforced by the monitoring station.
Application
The M-86 engine was installed on DB-3 production aircraft, on the ANT-37bis (DB-2B), R-9 (LBSh) experimental aircraft.
Literature
- Kotelnikov V. R. Domestic aircraft piston engines (1910-2009). - M .: Russian Foundation for the Promotion of Education and Science, 2010. - 504 p. - ISBN 978-5-91244-017-5 .