The Kawasaki Ki-100 

Japan
Japan

side viewfront viewunder view

After Allied bombing raids had destroyed the engines factory of Kawasaki, there were quite a few Ki-61-II-KAI airframes left engineless. The need for fighters was ever so high, however, and Kawasaki decided to try other engines on the airframes.
A suitable engine was soon found, being the Mitsubishi Ha-112-II radial engine. The radial was only a little larger in diameter then the original Ha-40 for the Ki-61-II's, so the fuselage could easily be adapted. The first trials proved ever so successful, and the remainder of the airframes was ordered to be fitted with the new engine, earning a new designation.

Versions:

Further pictures:

Kawasaki Ki-100
Kawasaki Ki-100

 

Technical data on the Kawasaki Ki-100-I-Ko
Powerplant 1 × Mitsubishi Ha-112-I radial, rated at 1500 hp (1118.23 kW) Role during war
  • Air superiority Fighter
  • Fighter
Length 28 ft 11.25 inch Height 12 ft 3.625 inch
Empty weight 5567 lb Operational weight 7705 lb typical
Wing Span 39 ft 4.5 inch Wing Aspect ratio 7.2
Wing Area 215.28 sq ft Service ceiling 36090 ft
Maximum speed 360 mph at 19685 ft Cruising speed 249 mph at optimum altitude
Initial climb rate Climb to 16,405 ft in 6 min 0 sec Range 870 miles typical,
1367 miles max
Fuel capacity internal 121 Imp gal (145 US gal) Fuel capacity external Up to 88 Imp gal (106 US gal) in 2 × 44 Imp gal (53 US gal) drop tanks
Machine guns 2 × 0.50 inch Ho-103 (Type 1) fixed forward-firing in the wing leading edge, 200 rounds each Cannons 2 × 20 mm Ho-5 fixed forward-firing in the upper nose, 120 rounds each
Bomb load Up to 1,102 lb, carried on two underwing hardpoints, rated at 551 lb each. General disposables load consisted of 2 × 551 lb bombs Torpedoes/rockets -
Crew 1Naval or ground based Ground
First flight (prototype) 1 February 1945 Operational Service March 1945 - August 1945
Manufacturer Kawasaki Kokuki kogyo K.K. Number produced 390 total, 272 this version
Metric system
Length 8.82 m Height 3.75 m
Empty weight 2525 kg Operational weight 3495 kg typical
Wing Span 12 m Wing Aspect ratio 7.2
Wing Area 20 m² Service ceiling 11000 m
Maximum speed 579 km/h at 6000 m Cruising speed 401 km/h at optimum altitude
Initial climb rate Climb to 5.000 m in 6 min 0 sec Range 1400 km typical,
2200 km max
Fuel capacity internal 550 liters Fuel capacity external Up to 400 liters in 2 × 200 liters drop tanks
Machine guns 2 × 12,7 mm Ho-103 (Type 1) fixed forward-firing in the wing leading edge, 200 rounds each Cannons 2 × 20 mm Ho-5 fixed forward-firing in the upper nose, 120 rounds each
Bomb load Up to 500 kg, carried on two underwing hardpoints, rated at 250 kg each. General disposables load consisted of 2 × 250 kg bombs Torpedoes/rockets -

Here is a quick overview of all different versions, without the full technical specifications:

Different versions of the Kawasaki Ki-100 
Kawasaki Ki-100-I-Ko Essentially Ki-61-II-KAI airframes, adapted to use the Mitsubishi Ha-112-II (Army Type 4) radials, see details above.
Number built: 272
Kawasaki Ki-100-I-Otsu Based on the Kawasaki Ki-100-I-Ko, but with a cut-down rear fuselage to enable an all-round vision cockpit canopy. This version was newly built, as opposed to the Kawasaki Ki-100-I-Ko which used Ki-61-II-KAI airframes.
Number built: 118
Kawasaki Ki-100-II Prototype stage only. This version was powered by 1 × Mitsubishi Ha-112-II Ru turbocharged radial, rated at 1,500 hp (1.118 kW).
Number built: 3 prototypes
Army Type 5 Fighter Model I-Ko Official Imperial Japanese Army Air Force designation for the Kawasaki Ki-100-I-Ko
Redesignated aircraft
Army Type 5 Fighter Model I-Otsu Official Imperial Japanese Army Air Force designation for the Kawasaki Ki-100-I-Otsu
Redesignated aircraft
Kawasaki Ki-100-Ia Western designation of the Kawasaki Ki-100-I-Ko
Redesignated aircraft
Kawasaki Ki-100-Ib Western designation of the Kawasaki Ki-100-I-Otsu
Redesignated aircraft

Remarks:

This fighter, which obtained no Allied codename, was loved by its pilots because of its characteristics. It could intercept high-flying Boeing B-29 Superfortresses as well as dogfight with Grumman F6F Hellcats. On one occasions a unit of Ki-100's tangled with Hellcats, and destroyed 14 of them without any losses on Japanese side.

Strengths:

Weaknesses:

 

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© by Frans Bonné, 2000
Last revision: 2/9/01