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Kinsei

The Mitsubishi Kinsei (金星 Venus?) was a 14-cylinder, air-cooled, twin-row radial aircraft engine developed by Mitsubishi Heavy Industries in Japan in 1934 for the Imperial Japanese Navy. The Mitsubishi model designation for this engine was A8 while it was an experimental project, in service it was known as the MK8 "Kinsei" by the Navy. In the middle of the war the engine was adopted by Army so it got designation Ha-112[1] Unified designation code was Ha-33. Its basic design was based on the single-row, 9-cylinder air-cooled Pratt and Whitney R-1689 Hornet, but underwent numerous modifications and improvements.[2]

Variants[]

  • -3 - 910 hp
  • -41 - 1,075 hp
  • -42 - 1,075 hp
  • -43 - 1,000 hp, 1,080 hp
  • -44 - 1,000 hp, 1,075 hp
  • -45 - 1,075 hp
  • -46 - 1,070 hp
  • -48 - 1,080 hp
  • -51 - 1,300 hp
  • -53 - 1,300 hp
  • -54 - 1,200 hp, 1,300 hp
  • -62 - 1,560 hp

Applications[]

Specifications (Kinsei-44)[]

Data from Jane's.[3]

General characteristics

  • Type: 14-cylinder air-cooled twin-row radial engine
  • Bore: 140 mm (5.5 in)
  • Stroke: 150 mm (5.9 in)
  • Displacement: 32.3 L (1,970 cu in)
  • Length: 1,646 mm (64.8 in)
  • Diameter: 1,218 mm (48.0 in)
  • Dry weight: 545 kg (1,202 lb)

Components

  • Valvetrain: Overhead valve, one inlet and one exhaust valve per cylinder, pushrod operated.
  • Supercharger: Centrifugal, single speed.
  • Oil system: Triple section pump, one pressure pump, two scavenge pumps.
  • Cooling system: Air-cooled
  • Reduction gear: Planetary gear, 0.7:1 ratio.

Performance

  • Power output: 1,075 hp (802 kW) at 2,500 rpm at 2,000 m (6,560 ft) maximum.
  • Specific power: 0.56 hp/cu in (24.8 kW/L)
  • Compression ratio: 6.6:1
  • Power-to-weight ratio: 0.9 hp/lb (1.5 kW/kg)

See also[]

Notes[]

  1. Gunston 1989, p.104.
  2. Peattie, Mark R., Sunburst: The Rise of Japanese Naval Air Power 1909-1941, Annapolis, Maryland: Naval Institute Press, 2001, ISBN 1-55750-432-6, p. 308.
  3. Jane's 1989, p.298.

Bibliography[]

  • Matsuoka Hisamitsu, Nakanishi Masayoshi. The History of Mitsubishi Aero Engines 1915-1945. Miki Press, Japan, 2005. ISBN 4-89522-461-9
  • Gunston, Bill. World Encyclopaedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
  • Jane's Fighting Aircraft of World War II. London. Studio Editions Ltd, 1989. ISBN 0-517-67964-7
  • Peattie, Mark R., Sunburst: The Rise of Japanese Naval Air Power 1909-1941, Annapolis, Maryland: Naval Institute Press, 2001, ISBN 1-55750-432-6

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