|Role||Military advanced training aircraft|
|Manufacturer||Tachikawa Aircraft Company|
|First flight||September 1939|
|Primary users||Imperial Japanese Army Air Force|
Royal Thai Air Force
|Produced||1940 - 1943|
|Developed from||Tachikawa Ki-36|
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-55 with a single machine gun. After successful testing of a prototype in September 1939, the type was put into production as the Tachikawa Army Type 99 Advanced Trainer.
Both the Ki-55 and the Ki-36 were given the Allied nickname 'Ida.'
- Army co-operation aircraft.
- An evolved version with a 447 kW (599 hp) Hitachi Ha38 engine and retractable undercarriage. Not built.
- Kumagaya Army Flying School
- Mito Army Flying School
- Tachiarai Army Flying School
- Utsonomiya Army Flying School
- National Government of China Air Force received several from the Japanese.
- Republic of China Air Force operated captured aircraft.
- People's Liberation Army Air Force operated more than 30 captured aircraft at the end of 1945. These Ki-55s were used until the last 14 retired in 1953.
Data from Japanese Aircraft of the Pacific War
- Crew: 2
- Length: 8 m (26 ft 3 in)
- Wingspan: 11.8 m (38 ft 9 in)
- Height: 3.64 m (11 ft 11 in)
- Wing area: 20 m2 (220 sq ft)
- Airfoil: root: NACA 23014; tip: NACA 23006
- Empty weight: 1,292 kg (2,848 lb)
- Gross weight: 1,721 kg (3,794 lb)
- Powerplant: 1 × Hitachi Ha13a (Army Type 98 450hp Air Cooled Radial) 9-cylinder air-cooled radial piston engine, 380 kW (510 hp) for take-off
- 350 kW (470 hp) at 1,700 m (5,577 ft)
- Propellers: 2-bladed wooden propeller
- Maximum speed: 349 km/h (217 mph; 188 kn) at 2,200 m (7,218 ft)
- Cruise speed: 235 km/h (146 mph; 127 kn)
- Range: 1,060 km (659 mi; 572 nmi)
- Service ceiling: 8,200 m (26,900 ft)
- Time to altitude: 3,000 m (9,843 ft) in 6 minutes 55 seconds
- Wing loading: 86.1 kg/m2 (17.6 lb/sq ft)
- Power/mass: 0.222 kW/kg (0.135 hp/lb)
- Guns: one fixed, forward-firing 7.7mm (0.303in) Type 89 machine gun
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