Four-stroke five-cylinder air-cooled radial engine

In the period 1929 – 1952, the aviation engine M-11 and its numerous modifications had serial production in the USSR. The M-11 was in service till 1959.

The M-11 was developed in the design bureau of the State Aviation Plant № 4 («Motor») within the contest for the best motor design to power 100hp trainer aircrafts (the contest was announced in 1923). The chief design engineer was A.D. Shvetsov. 

The М-11 became an example of mass production. Altogether, 100/130 thou engines were produced (between 1927-1952). The engine powered 88 production and pilot aircrafts.

М-11 — 100 hp (73,5 kW) by 1600 rpm

М-11D, М-11K — 115 hp (84,6 kW)

M-11F — 145 hp (107 kW) by 1740 rpm

Engine volume: 8,6 l

Power: 100 hp (73,5 kW) by 1600 rpm

Stroke cycle: 140 mm

Cylinder Diameter: 125 mm

Motor Maintenance Weight: 165 kg

Engine Weight: 160 kg

The design of a piston-type five-cylinder air-cooled radial engine was unique. Unlike most radial motors with a single central cam ring, the M-11 had individual camshafts for each cylinder. Besides, it is a single engine with aluminum cylinder heads screwed to steel case. 

AIR-6, G-20, MiG-8, SAM-5, U-2, UT-1, UT-2, SH-2, SchE-2, Fanera-2, Yak-6, YaK-12, YaK-18