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==Design and development==
==Design and development==


The Zuisei was the second engine design produced by Mitsubishi. 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.
The MK2A Zuisei was the second engine design produced by Mitsubishi. The 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 32.3 L (1,970 in³) and a nominal power rating of 805 kW (1080 hp) for takeoff and 787 kW (1055 hp) at 2800 meters (9185 feet).
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.

⚫
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".


⚫
Mitsubishi named its engines with a short two syllable name that references objects found in the sky. The sequence started with this engine, the MK2 Zuisei or "Holy star", and was followed in order by the MK4 Kinsei or "Venus" and the MK8 Kasei "Mars".
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Revision as of 17:22, 27 July 2011


Zuisei
Type 14-cylinder, air-cooled, supercharged, two-row radial piston engine
Manufacturer Mitsubishi
First run 1931

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, most notably, the first version of the Mitsubishi A6M Zero. Mitsubishi's internal design number was MK2, followed by the revision code letter, with MK2A being the first version of the 2nd engine design series.

Design and development

The MK2A Zuisei was the second engine design produced by Mitsubishi. The 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 32.3 L (1,970 in³) and a nominal power rating of 805 kW (1080 hp) for takeoff and 787 kW (1055 hp) at 2800 meters (9185 feet).

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.

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".


Variants

MK2A Zuisei 11 Ha-26-I
650 kW (870 hp) at takeoff, 634 kW (850 hp) at 2300 m (7500 ft). Unified system designation [Ha-31] 11
MK2B Zuisei 12
780hp at take-off, 875hp at 11,810 ft. Navy version of the Ha-26-I. Unified system designation [Ha-31] 12
MK2C Zuisei 13
840 hp (626 kW) Unified system designation [Ha-31] 13
MK2D Zuisei 21
1050 hp Unified system designation [Ha-31] 21

Engine identification

The Mitsubishi Ha-102 was known as the Mitsubishi Zuisei 21 when used on IJN aircraft, as the Mitsubishi Army Type 1 radial when used on IJA aircraft, or as [Ha-31] 21 under the unified system near the end of 1944. Variants of this engine were used on the Ki-46 "Dinah" and the Ki-57 .

Applications

Specifications (MK2A Zuisie 11)

Data from Mikesh

General characteristics

  • Type: 14-cylinder, air-cooled, supercharged, two-row radial piston engine
  • Bore: 140 mm (5.5 in)
  • Stroke: 150 mm (5.9 in)
  • Displacement: 32.3 L (1,970 in³)

Components


References

Notes

  1. ^ a b c d e Francillon p 376 Cite error: The named reference "Francillon" was defined multiple times with different content (see the help page).

Bibliography

  • Mikesh, Robert C.; Shorzoe, Abe (1990), Japanese Aircraft, 1910-1941, Annapolis, MD: Naval Institute Press, ISBN 1557505632 {{citation}}: Unknown parameter |lastauthoramp= ignored (|name-list-style= suggested) (help)
  • Francillon, R.J. (1970), Japanese Aircraft of the Pacific War, London: Putnam, ISBN 0-370-00033-1


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