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Tachikawa Ki-55
Role Military Advanced Training aircraft
Manufacturer Tachikawa Aircraft Company Ltd
First flight September 1939
Retired 1945 (Japan)
1953 (China)
Primary users Imperial Japanese Army Air Force
Royal Thai Air Force
Produced 1940 - 1943
Number built 1,389
Developed from Tachikawa Ki-36

The Tachikawa Ki-55 was a Japanese advanced trainer.

Design and development

The excellent characteristics of the Tachikawa Ki-36 made it potentially ideal as a trainer. This led to the development of the Ki-36 with a single machine-gun. After successful testing of a prototype in September 1939, the type was put into production as the Army Type 99 Advanced Trainer.

In all 1,389 were constructed before production ended in December 1943 with Tachikawa having built 1078 and Kawasaki 311.

Both the Ki-55 and the Ki-36 were given the Allied nickname 'Ida.'


  • Ki-55 : Two-seat advanced trainer aircraft.
  • Ki-72 : improved version. Not built.


Tachikawa Ki-55 trainer at the Royal Thai Air Force Museum.

 Republic of China
 People's Republic of China
  • Kumagaya Army Flying School
  • Mito Army Flying School
  • Tachiarai Army Flying School
  • Utsonomiya Army Flying School
 Republic of Korea

Francillon also mentions deliverance to the Japanese satellite air force of Cochinchina, which means the southernmost third part of present Vietnam[1]

Specifications (Ki-55)

Data from Japanese Aircraft of the Pacific War[2]

General characteristics

  • Crew: 2
  • Length: 8.00m (25ft 3in)
  • Wingspan: 11.80m (38ft 8.5in)
  • Height: 3.64m (11ft 11.25in)
  • Wing area: 20m² (215.29ft²)
  • Empty weight: 1,292kg (2,847lb)
  • Loaded weight: 1,721kg (3,794lb)
  • Max. takeoff weight: 1,721kg (3,793lb)
  • Powerplant: 1 × Hitachi Army Type 98 Ha-13a nine cylinder air-cooled radial engine, 380kW (510hp)at take-off


  • Maximum speed: 349km/h (217mph)
  • Cruise speed: 235km/h (146mph)
  • Range: 1,060km (659mi)
  • Service ceiling: 8,150m (26,740ft)
  • Wing loading: 86.1kg/m² (17.6lb/ft²)
  • Power/mass: kW/kg (hp/lb)


one fixed, forward-firing 7.7mm (0.303in) Type 89 machine gun

See also


  1. Francillon 1979, p. 252.
  2. Francillon 1979, p. 253.
  • Francillon, Ph.D., René J. Japanese Aircraft of the Pacific War. London: Putnam & Company Ltd., 1970 (2nd edition, 1979. ISBN 0-370-30251-6.; 3rd edition 1987, Putnam Aeronautical Books. ISBN 0-85177-801-1.)

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