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Ki-64 "Rob"

Heavy Fighter- Interceptor


Ki-64 Rob

The Ki.64 was developed for the Japanese Army Air Force and was one of the most innovative Japanese designs of the war. Original conceived of in 1939, the Ki.64 had a contrarotating propellor coupled to tandem mounted engines and equipped with an evaporative cooling system. The two Ha-40 engines were installed in the fuselage, one in the nose and the second one behind the pilot, with a long axis beneath the pilot's seat, driving contra-rotating propellors in the nose. This arrangment was known as the Ha-201. The Ki.64 also used steam vapour cooling with wing surface radiators to reduce drag even more.

The prototype was damaged on its fifth flight and the programme abandoned.

Ki-64 'Rob' Specification
Crew 1
Wing span 13.50 m (44 ft. 3 ½ in.)
Wing area, 28.00 m2 (301.389 Sq. Ft)
Length 11.03 m (36 ft. 2¼ in.)
Height 4.25m (10 ft. 5¼ in.)
Ha-201 ,24-Cylinder inverted Vee liquid cooled. power 2,350 hp
Empty weight 4,050 kg (8,929 lbs.)
Loaded weight 5,100kg (11,244 lbs.)
Maximum speed at altitude 690km/h (429 mph)
m (ft) 5,000 ( 16,400 ft)
Initial rate of climb 910m/min (2986 ft/min )
Time to level 5000m (16,400 ft) 5 min. 30 sec.
Service ceiling 12000 m (39,370 ft.)
Service range 1000 km (620 ml)
Four 20mm Type Ho-5 cannon  


  • - War Planes Of The Second World War - Fighters - /Green, William, 1964, Doubleday And Company, Inc., New York/