Tumansky M-88

M-88
Type	Radial aero engine
National origin	Soviet Union
Manufacturer	Tumansky
First run	1939
Developed from	Tumansky M-87

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

Design and development

The M-88 was designed to address the shortcomings of the Tumansky M-87. 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. The M-88 retained the same bore/stroke and displacement as the M-87 while increasing power to 1,000-1,150 hp. Design work began in 1937 and by 1939 the first prototypes were being flight tested in the Polikarpov I-180 fighter prototypes.^[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. 16,087 M-88's were produced. In hindsight, the Tumansky family of engines developed from the Gnome-Rhône 9K and Gnome-Rhône 14K were far less successful than the Shvetsov family of engines developed from the Wright R-1820.^[1]

Applications

Specifications (Tumansky M-88B)

General characteristics

Type: 14-cylinder twin-row air-cooled radial engine
Bore: 146 mm (5.75 in)
Stroke: 165 mm (6.50 in)
Displacement: 38.72 L (2,363 cu in)
Dry weight: 684 kg (1,508 lb)

Components

Supercharger: Two-speed, geared centrifugal
Cooling system: air-cooled

Performance

Power output: 1,100hp
Compression ratio: 6.1:1

References

^ ^a ^b Kotelnikov, Vladimir (2005). Russian piston aero engines. Ramsbury: Crowood. pp. 150–155. ISBN 1-86126-702-9. OCLC 58554098.

[:0-1] Kotelnikov, Vladimir (2005). Russian piston aero engines. Ramsbury: Crowood. pp. 150–155. ISBN 1-86126-702-9. OCLC 58554098.

[1]

v t e Tumansky aircraft engines
Piston engines	M-85 M-86 M-87 M-88 M-90
Gas turbines	RD-9 RD-10 R-11 R-13 R-15 R-21 R-25 R-29