Tumansky M-88

The Tumansky M-88 was an air-cooled radial engine for aircraft developed in the Soviet Union shortly before World War II.

The improvements incorporated in the M-88 were a strengthened crankcase, crankshaft, connecting rods, waffle ribbing at the piston bottom and a two speed geared centrifugal supercharger.

[1] At first the M-88 was not a success, but the designers persisted and the M-88 was made into a reliable and widely produced engine.

There were a number of different variants with the most numerous being the M-88B, of which 10,585 were produced at Zaporozhye and Omsk.

The M-88B solved most of the mechanical failures associated with the M-87 and early M-88's by including oil injectors in the crankshaft, improved cooling and strengthened drive components.