Tumansky M-87 was a Soviet air-cooled aircraft radial engine. Sergei Konstantinovich Tumansky (Сергей Константинович Туманский (b The Union of Soviet Socialist Republics (USSR was a constitutionally Socialist state that existed in Eurasia from 1922 to 1991 The radial engine is a reciprocating type internal combustion Engine configuration in which the cylinders point outward from a central

Development

In 1934, USSR licensed the French Gnome-Rhone 14K aircraft engine producing 800 hp (595 kW), which entered production as the M-85. This article is about the country For a topic outline on this subject see List of basic France topics. The Gnome-Rhône 14K Mistral Major was a 14-cylinder two-row air-cooled Radial engine. ^[1] The engine was subsequently modified to M-86 which produced 960 hp (715 kW) at takeoff thanks to increased supercharging and a higher compression ratio. A supercharger is an air compressor used for Forced induction of an Internal combustion engine. The compression ratio is a single number that can be used to predict the performance of any engine particularly piston engines (but can be used on essentially any Internal-combustion ^[1] The M-87 was created to further increase the power output. Cylinders and pistons were revised to increase the compression ratio and the supercharger was redesigned. The resulting engine had better high-altitude performance and entered production in 1938. However, the engine proved unreliable and suffered from failure of gears in the reduction gearbox. ^[1] Later the M-88 was designed to address the shortcomings of the M-87. The Tumansky M-88 was an air-cooled radial engine for aircraft developed in the Soviet Union shortly before World War II At first the M-88 wasn't a success, but the designers persisted and the M-88 was made into a reliable and widely produced engine. The M-87 was used in Ilyushin Il-4 and Sukhoi Su-2 bombers, and the Polikarpov I-180 fighter. WikipediaWikiProject Aircraft. Please see WikipediaWikiProject Aircraft/page content for recommended layout WikipediaWikiProject Aircraft. Please see WikipediaWikiProject Aircraft/page content for recommended layout WikipediaWikiProject Aircraft. Please see WikipediaWikiProject Aircraft/page content for recommended layout

In hindsight the Tumansky family of engines developed from Gnome-Rhône 9K and Gnome-Rhône 14K, were far less successful than the Shvetsov family of engines developed from the Wright R-1820. Sergei Konstantinovich Tumansky (Сергей Константинович Туманский (b The Gnome-Rhône 9K was a 9-cylinder 550 hp (405 kW air cooled radial engine that started life as an enlarged Gnome-Rhône 7K with two extra cylinders The Gnome-Rhône 14K Mistral Major was a 14-cylinder two-row air-cooled Radial engine. Shvetsov was a Soviet design bureau founded in Perm, USSR in 1934 to produce the Wright Cyclone -derived Shvetsov M-25. WikipediaWikiProject Aircraft. Please see WikipediaWikiProject Aircraft/page content for recommended layout

Family tree of Tumansky engines

Specifications (M-87)

General characteristics

• Type: two-row 14-cylinder air-cooled supercharged radial engine
• Bore: 146mm (5. The radial engine is a reciprocating type internal combustion Engine configuration in which the cylinders point outward from a central 75 in)
• Stroke: 156mm (6. 5 in)
• Displacement: 38. 72 l (2,363 in³)
• Dry weight: 640 kg (1,140 lb)

Components

• Supercharger: Centrifugal type supercharger
• Cooling system: air

Performance

• Power output: 950 hp (710 kW) at 2,250 rpm for takeoff and at 4 500 m (14,765 ft)
• Specific power: 18. A supercharger is an air compressor used for Forced induction of an Internal combustion engine. The centrifugal-type supercharger is an engine-driven compressor used to increase the power output of an Internal-combustion engine by increasing the amount of available In Engineering, the term specific power can refer to power either per unit of Mass, Volume or Area, although power per unit of 4 kW/l (0. 4 hp/in³)
• Compression ratio: 6. The compression ratio is a single number that can be used to predict the performance of any engine particularly piston engines (but can be used on essentially any Internal-combustion 1:1
• Power-to-weight ratio: 1. Power-to-weight ratio (specific power is a calculation commonly applied to Engines and other mobile power sources to enable the comparison of one unit or design to another 1 kW/kg (0. 8 hp/lb)

References

1. ^ ^{a b c} DB-3. Airpages. ru. Retrieved on 2007-01-08. Year 2007 ( MMVII) was a Common year starting on Monday of the Gregorian calendar in the 21st century. Events 871 - Battle of Ashdown - Ethelred of Wessex defeats a Danish invasion army