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  • Kawasaki Ki-100 Fighter Aircraft

    The Kawasaki Ki-100 was the definitive high-performance fighter for Imperial Japan, oft-regarded as the best fighter the country fielded by the end of the war in 1945.

     Updated: 4/5/2017; Authored By Staff Writer; Content ¬©www.MilitaryFactory.com

    Despite being produced in severely limited numbers (thanks in large part to the Allied bombing campaigns in the Pacific), the Kawasaki Ki-100 is often regarded as one of the best Japanese production fighters available in the closing months of the war. The system was designed as an off-shoot of the semi-successful Kawasaki Ki-61 Hien yet it offered up better high-altitude performance that allowed for the interception of the high-flying American B-29 Superfortresses. The Ki-100 proved to be a valued and capable performer, which in itself was a triumph considering the series did nothing more than attach a successful powerplant to an existing airframe (Ki-61-II models) done in initially by its own engine shortage.

    The Ki-100 would have not been a development had the Allied bombing campaign put an end to the factory supplying a new-breed Kawasaki engine powering the Ki-61 series. As a result, Kawasaki found itself with a bounty of empty airframes in need of a powerplant and it was decided to mate the airframes with a proven Mitsubishi-type albeit with a little modification to the Ki-61 design. The result was the Kawasaki Ki-100 fighter series with the Mitsubishi Ha-112-II of 1,500 horsepower. With three such examples produced, the aircraft tested positively and forced the conversion of over 270 airframes of equal design. Combat results were equally favorable, earning the Ki-100 a grand reputation and offering the Japanese Army a true performer in equal terms with American aircraft ingenuity.

    Externally, the resulting Ki-100 shared little in resemblance to the preceding Ki-61 design. Still of a low-monoplane wing layout, the noticeable difference was in the enlarged fuselage, particularly at forward, where room was made to accommodate the larger Mitsubishi powerplant. The cockpit was situated high and above the wings, offering up a tremendous view from all sides and to the rear. the cockpit, incidentally, was of an original design related to the proposed Ki-61-III but never executed until the need for the Ki-100 arose. Armament consisted of a pair of 12.7mm machine guns mounted in the fuselage with a single instance of 20mm cannon in each wing. The armament combination offered up good bomber-destroying capabilities that were lacking in most of the earlier Japanese designs. Two under-wing hardpoints provided the system with an optional pair of 551 pound drop bombs for ground attack duties or drop tanks for increased operational range.

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    Kawasaki Ki-100-Ib Technical Specifications

    Service Year: 1945
    Type: Fighter Aircraft
    National Origin: Imperial Japan
    Manufacturer(s): Kawasaki - Japan
    Production Total: 374

    Structural (Crew Space, Dimensions and Weights)

    Operating Crew: 1
    Length: 28.87 feet (8.8 meters)
    Width: 39.37 feet (12.00 meters)
    Height: 12.30 feet (3.75 meters)

    Weight (Empty): 5,952 lb (2,700 kg)
    Weight (MTOW): 8,091 lb (3,670 kg)

    Installed Power and Standard Day Performance

    Engine(s): 1 x Mitsubishi Ha-112-II 14-cylinder radial piston engine developing 1,500 horsepower.

    Maximum Speed: 367 mph (590 kph; 319 knots)
    Maximum Range: 772 miles (1,243 km)
    Service Ceiling: 35,007 feet (10,670 meters; 6.63 miles)
    Rate-of-Climb: 1,640 feet-per-minute (500 m/min)

    Armament / Mission Payload

    2 x 12.7mm Ho-103/Type 1 machine guns
    2 x 20mm Ho-5 cannons in wings

    2 x 551lb bombs OR 2 x external drop tanks for increased range.

    Global Operators / Customers

    Imperial Japan

    Model Variants (Including Prototypes)

    Ki-61-II - Base Airframe Models on which the design of the Ki-100 is based on; three initial prototypes converted for testing; fitted with Mitsubishi Ha-112-II engines.

    Ki-100-Ia (Army Type 5 Fighter Model 1A) - New Series Designation; 272 examples converted from Ki-61-II airframes.

    Ki-100-Ib - Second Production Offering with subtle design changes; shortened fuselage; redesigned canopy; 99 examples produced before war's end.

    Ki-100-II - Proposed "Improved" Ki-100 Series; only three prototypes produced; fitted with Mitsubishi Ha-112-IIru engines plus turbocharger for improved high-altitude performance capabilities.