Kawasaki Ki-28 (, キ28 Ki-Nijuhachi) World War II Allied reporting name "Bob", was an experimental [1 ] fighter aircraft designed for the Imperial Japanese Army and meant as a replacement for the Kawasaki Ki-10. It flew in 1936, but was never produced for actual use as the Army choose the Nakajima Ki-27.
Design & Development [ edit ]
The Ki-28 was initially produced by
Kawasaki Kōkūki Kōgyō KK in response to Japanese army specifications for a fighter to replace the existing Kawasaki Ki-10. In mid-1935, Kawasaki, Mitsubishi and Nakajima were instructed to build competitive prototypes. The Kawasaki design was based on its earlier, but unsuccessful Ki-5. It was a low-wing cantilever monoplane of all-metal construction, except for fabric-covered control surfaces, with a conventional tail unit, fixed tailskid landing gear and powered by a 596 kW (800 hp) Kawasaki Ha 9-II-Ko liquid-cooled inline V12 engine. [2 ]
Service trials proved that the Kawasaki Ki-28 was the fastest of the three contenders, but the
Nakajima Ki-27 was by far the most maneuverable and had the lowest wing-loading, and on this basis was selected by the Imperial Japanese Army Air Force. Despite losing to the Ki-27, the Ki-28 provided Kawasaki with valuable experience which would later help with development of the [3 ] Kawasaki Ki-60 and Kawasaki Ki-61 fighters. [2 ]
Mistakenly believing the Ki-28 to have entered production in Japan as the Army Type 97 Fighter, the Allies assigned it the reporting name "Bob" during
World War II. [1 ]
Operators [ edit ]
Military operators [ edit ]
Specifications [ edit ]
Data from Famous Aircraft of the World, no.76: Japanese Army Experimental Fighters (1); [4 ] Japanese Aircraft, 1910-1941 [5 ]
Length: 7.9 m (25.92 ft)
12 m (39.37 ft) Wingspan:
Height: 2.60 m (8.53 ft)
Wing area: 19 m² (204.52 ft²)
1,420 kg (3,130 lb) Empty weight:
Loaded weight: 1,760 kg (3,880 lb)
Useful load: 340 kg (750 lb)
1 × Powerplant: Kawasaki Ha-9-II-Ko liquid-cooled in-line piston V-12 engine, 800 hp (597 kW)
Propellers: 1 propeller
Propeller diameter: 2.90 m (10 ft)
See also [ edit ]
References [ edit ]
Francillon, René J.
Japanese Aircraft of the Pacific War Annapolis, Maryland: Naval Institute Press, 1979, ISBN 0-87021-313-X.
Mikesh, Robert C.; Shorzoe Abe (1990). Japanese Aircraft, 1910-1941. Annapolis, MD: Naval Institute Press. ISBN 1-55750-563-2. Unknown Author(s).
Famous Aircraft of the World, no.76: Japanese Army Experimental Fighters (1). Tokyo, Japan: Bunrin-Do Co. Ltd., August 1976. Wieliczko, Leszek A. and Zygmunt Szeremeta.
Nakajima Ki 27 Nate (bilingual Polish/English). Lublin, Poland: Kagero, 2004. ISBN 83-89088-51-7.