| 释义 |
- Design and development
- Variants
- Applications
- Specifications (MK4V 27)
- See also
- References Notes Bibliography
{{Refimprove|date=March 2017}}{{about|the aircraft engine|the former chemical company of the same name Mitsubishi Kasei Corporation (三菱化成株式会社)|Mitsubishi Chemical Corporation}}| name=Kasei | image=Kasei 11.JPG | caption=Mitsubishi Kasei MK4B 11 used on Mitsubishi G4M Betty }}{{Infobox aircraft engine | type=Piston aircraft engine | national origin=Japan | manufacturer=Mitsubishi | designer= | first run= 1938 | major applications= Mitsubishi G4M Betty, Mitsubishi J2M Raiden, Nakajima B6N Tenzan | number built = 16,486 by Mitsubishi and 11-th NAD during 1941-45 | program cost = | unit cost = | developed from = Mitsubishi Shinten | developed into = | variants with their own articles =
}} |
The {{nihongo|Mitsubishi Kasei|火星|Mars}} was a two-row, 14-cylinder air-cooled radial engine built by Mitsubishi Heavy Industries and used in a variety of World War II Japanese aircraft, such as Mitsubishi J2M and Mitsubishi G4M.[1] The Mitsubishi model designation for this engine was A10 while it was an experimental project, in service it was known as the MK4, and known as the Ha101 & Ha111 by the Army and Kasei by the Navy. According to unified designation code it was Ha-32 of the variants from 11 to 27. Design and developmentAlthough originally ordered by the Imperial Japanese Navy, the Kasei was based on the earlier Mitsubishi Shinten engine, itself based originally on the Mitsubishi Kinsei. Produced in a wide variety of models, the Kasei began with a rated power of {{convert|1530|HP|kW}}, with a gradual evolution to {{convert|1850|HP|kW}} in later wartime versions. Three variants were developed for the Japanese Navy starting in 1939. It was also later adopted by the Imperial Japanese Army as the Ha-101 engine. Unified code was Ha-32. Physically, the engine had a rather large {{convert|1322|mm|in|1}} diameter compared to the {{convert|1180|mm|in|1}} of the Nakajima Homare engine. Its size and weight meant it was a challenging engine to use on single engine fighters.{{Citation needed|date=June 2011}} Variants{{convert|1530|HP|kW}}, 2450 rpm at takeoff
{{convert|1410|HP|kW}}, 2350 rpm at {{convert|1000|m|ft}}
{{convert|1380|HP|kW}}, 2350 rpm at {{convert|4000|m|ft}} - MK4B [Ha-32] 12 - same as MK4A 11
- MK4C [Ha-32] 13 - with extended propeller shaft
{{convert|1460|HP|kW}}, 2450 rpm at takeoff
{{convert|1420|HP|kW}}, 2350 rpm at {{convert|2600|m|ft}}
{{convert|1300|HP|kW}}, 2350 rpm at {{convert|6000|m|ft}} - MK4D [Ha-32] 14 - with contra-rotating shafts
- MK4E [Ha-32] 15 - with improved altitude performance
- MK4P [Ha-32] 21
{{convert|1850|HP|kW}}, 2600 rpm at takeoff
{{convert|1680|HP|kW}}, 2500 rpm at {{convert|2600|m|ft}}
{{convert|1540|HP|kW}}, 2500 rpm at {{convert|6000|m|ft}} - MK4Q [Ha-32] 22 - same as MK4A 21
- MK4R [Ha-32] 23 - Water-injection
{{convert|1820|HP|kW}}, 2600 rpm at takeoff
{{convert|1600|HP|kW}}, 2500 rpm at {{convert|1300|m|ft}}
{{convert|1520|HP|kW}}, 2500 rpm at {{convert|4100|m|ft}} - MK4R-C [Ha-32] 23c - {{convert|1820|HP|kW}} - Fitted with a turbo charger that allowed an output of {{convert|1420|HP|kW}} to be maintained up to {{convert|30000|ft|m|0}} instead of only {{convert|15750|ft|m|0}}
- MK4S [Ha-32] 24 - Same power as the MK4P 21 with contra-rotating shafts
- MK4T [Ha-32] 25 - {{convert|1825|HP|kW}},{{convert|1850|HP|kW}}
- MK4R [Ha-32] 26
{{convert|1800|HP|kW}}, 2600 rpm at takeoff
{{convert|1510|HP|kW}}, 2500 rpm at {{convert|2800|m|ft}}
{{convert|1810|HP|kW}}, 2500 rpm at {{convert|7200|m|ft}} - MK4U-4 [Ha-32] 26a - Mechanically driven 3-speed supercharger
{{convert|1820|HP|kW}} {{convert|1795|HP|kW}} Applications- Kawanishi E15K
- Kawanishi H8K
- Kawanishi N1K Kyofu
- Mitsubishi G4M
- Mitsubishi J2M Raiden
- Nakajima B6N Tenzan
- Nakajima G5N Shinzan
- Yokosuka P1Y Ginga
- Mitsubishi Ki-21
Specifications (MK4V 27){{pistonspecs|
|ref={{citation needed|date=January 2014}}
|type=14-cylinder, two-row, radial piston engine
|bore={{convert|150|mm|in|abbr=on}},
|stroke={{convert|170|mm|in||abbr=on}}
|displacement= 42 L (2,567 cu in)
|length=
|diameter={{convert|1340|mm|in||abbr=on}}
|width=
|height=
|weight={{convert|780|kg|lb||abbr=on}}
|valvetrain=Pushrod operated overhead-valve system with 2 valves per cylinder
|supercharger=Centrifugal, two-speed single stage
|turbocharger=
|fuelsystem=
|fueltype=
|oilsystem=
|coolingsystem=Air-cooled
|power=
- {{convert|1850|HP|kW}} at Takeoff
- {{convert|1680|HP|kW}} at {{convert|6889|ft|m|0}} Low blower rated with water injection)
- {{convert|1570|HP|kW}} at {{convert|18044|ft|m|0}}, Rated high blower with water injection)
|specpower= 0.72 hp/in³ (32.9 Kw/L)
|compression=6.5:1
|fuelcon=
|specfuelcon=
|oilcon=
|power/weight=1.08 hp/lb (1.77 kW/kg)
|designer=
|reduction_gear=Double planetary spur reduction gear, Ratio: 0.538:1
|general_other=
|components_other=
|performance_other=
}}See also{{aircontent
|see also=
|related=
|similar aircraft=
|lists=
|similar engines=- BMW 801
- Nakajima Mamoru
- Pratt & Whitney R-1830
- Wright R-2600
}}ReferencesNotes1. ^Gunston 1989, p.104.
Bibliography{{refbegin}}- 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}}
- {{cite book | last = Peattie | first = Mark | coauthors = | year = 2001 | title = Sunburst:The Rise of Japanese Naval Air Power 1909-1941 | publisher = Naval Institute Press | isbn = 1-59114-664-X}}
{{refend}}{{Mitsubishi aeroengines}}{{Japanese Imperial Army aeroengines}}{{Imperial Japanese Navy aero engines}}{{Aeroengine-specs}} 2 : Aircraft air-cooled radial piston engines|Aircraft piston engines 1930–1939 |