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The Mitsubishi Ki-57 was a Japanese passenger transport aircraft, developed from the Ki-21 bomber, during the early 1940s.

Ki-57
MC-20-I, with a nickname Asagumo (morning cloud), used by Asahi Shimbun
Role Transport aircraft
Paratroop transport
Passenger aircraft
Manufacturer Mitsubishi Heavy Industries
First flight August 1940
Introduction 1942
Primary users Imperial Japanese Army Air Force
Imperial Japanese Navy Air Service
Imperial Japanese Airways
Produced 1940–1945
Number built 406
Developed from Mitsubishi Ki-21

Development


In 1938, when the Ki-21 heavy bomber began to enter service with the Imperial Japanese Army, its capability attracted the attention of the Imperial Japanese Airways. In consequence a civil version was developed and this, generally similar to the Ki-21-I and retaining its powerplant of two 708 kW (950 hp) Nakajima Ha-5 KAI radial engines, differed primarily by having the same wings transferred from a mid to low-wing configuration and the incorporation of a new fuselage to provide accommodation for up to 11 passengers. This transport version appealed also the navy, and following the flight of a prototype in August 1940 and subsequent testing, the type was ordered into production for both civil and military use.[1]

This initial production Ki-57-I had the civil and military designations of MC-20-I and Army Type 100 Transport Model 1, respectively. A total of 100 production Ki-57-Is had been built by early 1942, and small numbers of them were transferred for use by the Japanese navy in a transport role, then becoming redesignated L4M1. After the last of the Ki-57s had been delivered production was switched to an improved Ki-57-II, which introduced more powerful 805 kW (1,080 hp) Mitsubishi Ha-l02 14-cylinder radial engines installed in redesigned nacelles and, at the same time, incorporated a number of detail refinements and minor equipment changes. Civil and military designations of this version were the MC-20-II and Army Type 100 Transport Model 2, respectively. Only 406 were built before production ended in January 1945. Both versions were covered by the Allied reporting name "Topsy".[2]


Variants


MC-20-II with the nickname Hakutsuru (white crane) during the Sino-Japanese war
MC-20-II with the nickname Hakutsuru (white crane) during the Sino-Japanese war

Operators


A wrecked Ki-57 on Honshu in late 1945
A wrecked Ki-57 on Honshu in late 1945

Wartime


Military operators

 Japan
 Manchukuo

Civil operators

 Japan
 Manchukuo
Reorganized National Government of China
 Second Philippine Republic

Post-war


 China
 Japan
 Netherlands

Accidents and incidents



Specifications (Ki-57-II)


3-view drawing of the Mitsubishi Ki-57
3-view drawing of the Mitsubishi Ki-57

Data from Japanese AIrcraft of the Pacific War[4]

General characteristics

Performance


See also


Related development

Related lists


References


  1. Francillon 1979, pp. 182–183.
  2. Francillon 1979, pp. 183–184.
  3. Francillon 1979, p. 184.
  4. Francillon 1979, pp. 184–185.
Bibliography



На других языках


[de] Mitsubishi Ki-57

Die Mitsubishi Ki-57 (Alliierter Codename: Topsy) war ein Passagierflugzeug, das als Tiefdecker aufgrund der Nachfrage der Japan Air Lines nach einer zivilen Version des Bombers Mitsubishi Ki-21 konstruiert wurde.
- [en] Mitsubishi Ki-57

[fr] Mitsubishi Ki-57

Le Mitsubishi Ki-57 est un avion de transport de passagers japonais, développé à partir du bombardier Ki-21, au début des années 1940.

[it] Mitsubishi Ki-57

Il Mitsubishi Ki-57 (三菱 キ57?) (nome di identificazione alleato Topsy[3]), fu un bimotore da trasporto giapponese, evoluzione del Ki-21, costruito dalla Mitsubishi Heavy Industries durante la seconda guerra mondiale.

[ru] Mitsubishi Ki-57

Ki-57 — двухмоторный моноплан цельнометаллической конструкции.



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