The Mitsubishi Zuisei (瑞星, Holy Star) was a 14-cylinder, supercharged, air-cooled, two-row radial engine used in a variety of early World War II Japanese aircraft. It was one of the smallest 14-cyl. engines in the world and the smallest diameter Japanese engine. The Mitsubishi model designation for this engine was A14 while it was an experimental project, in service it was known as the MK2, followed by the revision code letter, and known as the Ha-26 and Ha-102 by the Army and "Zuisei" by the Navy. Unified designation code was Ha-31.[1]
The MK2A Zuisei engine was a 14-cylinder, supercharged, air-cooled two-row radial engine with a 140 mm (5.5 in) bore and 130 mm (5.12 in) stroke for a displacement of 28L (1,710ci) and a nominal power rating of 805 kW (1080 hp) for takeoff and 787 kW (1055 hp) at 2800 meters (9185 feet).[1]
Mitsubishi used the standard designation system to identify this engine while it was under development. The MK2 designation starts with the Manufacturer's assigned identification letter, in this case, "M" for Mitsubishi, followed by a letter that identifies the engine arrangement, in this case "K" for air-cooled, and then the sequentially assigned design number, in this case "2" for the second design. Revisions to the engine are identified by the letter following the preceding designation, with letter "A" being the original, or first, version.[2]
Mitsubishi also had a custom to name its engines with a short two syllable name that references objects found in the sky. The naming sequence started with this engine, the MK2 Zuisei "Holy star", and was followed in order by the MK4 Kinsei "Venus" and the MK8 Kasei "Mars".[3]
Variantsedit
MK2A Zuisei 11
875 horsepower (652 kW), 2540 rpm at takeoff, 925 horsepower (690 kW), 2450 rpm at 1,800 metres (5,900 ft)
MK2B Zuisei 12
780 horsepower (580 kW), 2540 rpm at take-off, 875 horsepower (652 kW) 2540 rpm at 3,600 metres (11,800 ft)
MK2C Zuisei 13
1,080 horsepower (810 kW), 2700 rpm at take-off, 950 horsepower (710 kW) 2600 rpm at 6,000 metres (20,000 ft)
MK2C Zuisei 14 Ha-26-I
850 horsepower (630 kW), 2650 rpm at take-off, 900 horsepower (670 kW) 2650 rpm at 3,500 metres (11,500 ft)
MK2C Zuisei 15 Ha-26-II
940 horsepower (700 kW), 2650 rpm at take-off, 950 horsepower (710 kW) 2650 rpm at 6,000 metres (20,000 ft)
MK2D Zuisei 21 Ha-102
1,080 horsepower (810 kW), 2700 rpm at take-off, 1,050 horsepower (780 kW) 2700 rpm at 2,800 metres (9,200 ft), 950 horsepower (710 kW) 2700 rpm at 5,800 metres (19,000 ft)
Matsuoka Hisamitsu, Nakanishi Masayoshi. The History of Mitsubishi Aero Engines 1915-1945. Miki Press, Japan, 2005. ISBN4-89522-461-9
Francillon, R.J. (1970), Japanese Aircraft of the Pacific War, London: Putnam, ISBN0-370-00033-1
Goodwin, Mike & Starkings, Peter (2017). Japanese Aero-Engines 1910-1945. Sandomierz, Poland: MMPBooks. ISBN978-83-65281-32-6.
External linksedit
January 01, 1970
mitsubishi, zuisei, 瑞星, holy, star, cylinder, supercharged, cooled, radial, engine, used, variety, early, world, japanese, aircraft, smallest, engines, world, smallest, diameter, japanese, engine, mitsubishi, model, designation, this, engine, while, experiment. The Mitsubishi Zuisei 瑞星 Holy Star was a 14 cylinder supercharged air cooled two row radial engine used in a variety of early World War II Japanese aircraft It was one of the smallest 14 cyl engines in the world and the smallest diameter Japanese engine The Mitsubishi model designation for this engine was A14 while it was an experimental project in service it was known as the MK2 followed by the revision code letter and known as the Ha 26 and Ha 102 by the Army and Zuisei by the Navy Unified designation code was Ha 31 1 Zuisei Type 14 cylinder air cooled supercharged two row radial piston engine Manufacturer Mitsubishi First run 1931 Major applications Kawanishi E7K2 Kawasaki Ki 45 Mitsubishi F1M Mitsubishi C5M Mitsubishi Ki 46 I Mitsubishi Ki 51 Number built 11 903 Developed from Mitsubishi Kinsei Contents 1 Design and development 2 Variants 3 Applications 4 Specifications MK2A Zuisei 11 4 1 General characteristics 4 2 Components 4 3 Performance 5 References 5 1 Notes 5 2 Bibliography 6 External linksDesign and development editThe MK2A Zuisei engine was a 14 cylinder supercharged air cooled two row radial engine with a 140 mm 5 5 in bore and 130 mm 5 12 in stroke for a displacement of 28L 1 710ci and a nominal power rating of 805 kW 1080 hp for takeoff and 787 kW 1055 hp at 2800 meters 9185 feet 1 Mitsubishi used the standard designation system to identify this engine while it was under development The MK2 designation starts with the Manufacturer s assigned identification letter in this case M for Mitsubishi followed by a letter that identifies the engine arrangement in this case K for air cooled and then the sequentially assigned design number in this case 2 for the second design Revisions to the engine are identified by the letter following the preceding designation with letter A being the original or first version 2 Mitsubishi also had a custom to name its engines with a short two syllable name that references objects found in the sky The naming sequence started with this engine the MK2 Zuisei Holy star and was followed in order by the MK4 Kinsei Venus and the MK8 Kasei Mars 3 Variants editMK2A Zuisei 11 875 horsepower 652 kW 2540 rpm at takeoff 925 horsepower 690 kW 2450 rpm at 1 800 metres 5 900 ft MK2B Zuisei 12 780 horsepower 580 kW 2540 rpm at take off 875 horsepower 652 kW 2540 rpm at 3 600 metres 11 800 ft MK2C Zuisei 13 1 080 horsepower 810 kW 2700 rpm at take off 950 horsepower 710 kW 2600 rpm at 6 000 metres 20 000 ft MK2C Zuisei 14 Ha 26 I 850 horsepower 630 kW 2650 rpm at take off 900 horsepower 670 kW 2650 rpm at 3 500 metres 11 500 ft MK2C Zuisei 15 Ha 26 II 940 horsepower 700 kW 2650 rpm at take off 950 horsepower 710 kW 2650 rpm at 6 000 metres 20 000 ft MK2D Zuisei 21 Ha 102 1 080 horsepower 810 kW 2700 rpm at take off 1 050 horsepower 780 kW 2700 rpm at 2 800 metres 9 200 ft 950 horsepower 710 kW 2700 rpm at 5 800 metres 19 000 ft Applications editMitsubishi A6M prototype 1 Mitsubishi F1M 4 Mitsubishi G5M1 5 Kawanishi E7K 6 Kawasaki Ki 45 7 Kokusai Ki 105 8 Mitsubishi Ki 46 7 Mitsubishi Ki 57 9 Specifications MK2A Zuisei 11 editData from citation needed General characteristics Type 14 cylinder air cooled supercharged two row radial piston engine Bore 140 mm 5 5 in Stroke 130 mm 5 1 in Displacement 28 0 L 1 710 in Diameter 1 118 mm 44 0 in Dry weight 540 kg 1 190 lb Components Valvetrain pushrod operated Two overhead valves per cylinder Supercharger centrifugal single stage single speed Fuel type 87 octane rating gasoline Cooling system air cooled Performance Compression ratio 6 5References editNotes edit a b c Francillon p 376 Francillon p 515 Francillon p 516 Francillon p 362 Francillon p 425 Francillon p 300 a b Francillon p 100 Francillon p 485 Francillon p 184 Bibliography edit Matsuoka Hisamitsu Nakanishi Masayoshi The History of Mitsubishi Aero Engines 1915 1945 Miki Press Japan 2005 ISBN 4 89522 461 9 Francillon R J 1970 Japanese Aircraft of the Pacific War London Putnam ISBN 0 370 00033 1 Goodwin Mike amp Starkings Peter 2017 Japanese Aero Engines 1910 1945 Sandomierz Poland MMPBooks ISBN 978 83 65281 32 6 External links edithttps web archive org web 20120128225759 http www enginehistory org Japanese nasm research 2 shtml Retrieved from https en wikipedia org w index php title Mitsubishi Zuisei amp oldid 1195351070, wikipedia, wiki, book, books, library,
