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Japan's Imperial Army flag

Japan's Kawasaki Ki-100 fighter, Army Type 5

Photos

  • Kawasaki Ki-100 fighter

 

Design

The Kawasaki Ki-100 was designed to combat against the B-29s that were flying at 30,000'.

Engine

The Kawasaki Ki-100 was made by combining Ki-61-II airframes with the Mitsubishi Ha-112-II radial engine.

The designers of the Ki-100 studied the engine mounting system on the Focke-Wulf 190A to determine a method for mounting the small diameter Ha-112 radial.

The Kawasaki Ha-140 engine was to be used but the Akashi factory was destroyed in an air raid.

As there were airframes waiting to have engines installed, Kawasaki converted three by installing the Mitsubishi Ha-112-II engine. Once these were show to be successful the rest of the airframes were converted by May 1945.

Prototype

The prototype of the Ki-100 first flew on February 1, 1945. The prototype was found to be maneuverable and high performance. Two more prototypes were constructed and showed excellent results in tests.

The Ki-100-II prototypes first flew in May and June 1945.

Production

  • Prototypes: 3
    • Manufacturer: Kawasaki Kokuki Kogyo K.K. at Kagamigahara
    • Production: February 1945
  • Kawasaki Ki-100-Ia, Army type 5 Fighter Model 1A: 272
    • The Imperial Japanese Army Air Force ordered 272 Ki-100-Ia conversions. Deliveries began in March 1945.
    • Manufacturer: Kawasaki Kokuki Kogyo K.K. at Kagamigahara
    • Production: February - June 1945
  • Kawasaki Ki-100-Ib: 99, 106, 118
    • Manufacturer: Kawasaki Kokuki Kogyo K.K. at Kagamigahara (106) and Ichinomiya (12)
    • Production: May 1945 - August 1945
      • Ichinomiya was bombed and production stopped in July 1945
  • Kawasaki Ki-100-II: 2, 3
    • Manufacturer: Kawasaki Kokuki Kogyo K.K. at Kagamigahara
    • Production: May - June 1945
  • Total: 396
    • Manufacturer: Kawasaki Kokuki Kogyo K.K.
    • Production: February - August 1945
    • 275 prototypes and Ki-100-Ias converted from Ki-61-II airframes.

Variants

  • Kawasaki Ki-100-Ia, Army type 5 Fighter Model 1A: Converted from Ki-61-II airframes.
  • Kawasaki Ki-100-Ib: Fuselage was cut down behind the cockpit. New canopy allowed for all around vision.
  • Kawasaki Ki-100-II: Only prototypes built. Was to have turbo charged Ha-112 engine. Was improved aerodynamically.

Usage

The Ki-100 was used as an excellent high altitude interceptor. To many of the pilots and crews it was the best Japanese fighter of World War II.

Units

  • Sentais: 5, 17, 18, 59, 111, 244

Highly Successful

One Ki-100 unit destroyed fourteen United States Navy Hellcats without a loss to themselves.

Specifications

  Kawasaki Ki-100
Type Fighter
Crew 1
Engine (Type) Mitsubishi Ha-112-II
Cylinders Radial 14
Net HP 1,500
Propeller blades 3
Dimensions  
Span 39' 4.5"
12 m
Length 28' 11.25"
8.82 m
Height 12' 3.5"
3.75 m
Armament  
Nose 2: 20 mm
Wings 2: 12.7 mm MG
Bombs - under wings 2: 551 lb
2: 250 kg
  Kawasaki Ki-100-I
Type Fighter
Crew 1
Engine (Type) Mitsubishi Ha-33 or Ha-112-II
Cylinders Radial 14
Cooling Air
Net HP 1,500
Propeller blades 3 metal constant speed
Dimensions  
Span 39' 4 7/16"
12 m
Length 28' 11.25"
8.82 m
Height 12' 3 5/8"
3.75 m
Wing area 215.278 sq ft
20 sq m
Weight  
Empty 5,567 lb
2,525 kg
Loaded 7,705 lb
3,495 kg
Performance  
Speed at 19,685' / 6,000 m 360 mph
579 kph, 580 kph
Speed at 32,810' / 10,000 m 332 mph
534 kph 535 kph
Speed - Cruising 248 mph
400 kph
Speed - Cruising at 13,125' / 4,000 m 249 mph
400 kph
Climb 3,280'/minute
1,000 m/minute
Climb to 16,405' / 5,000 m 6 minutes, 20 minutes
Climb to 32,810' / 10,000 m 20 minutes
Service ceiling 36,090'
11,000 m
Range 870 miles
1,400 km
Range with drop tanks / maximum 1,367 miles
2,200 km
Armament  
Fuselage 2: 20 mm Ho-5
Wings 2: 12.7 mm Type I / Ho-103
Bombs 2: 551 lb
2: 250 kg
OR  
Drop Tanks 2: 44 Gallon
2: 200 liter
  Kawasaki Ki-100-Ia/b
Type Fighter
Crew 1
Engine (Type) Mitsubishi Ha-112-II
Cylinders Radial 14
Net HP 1,500
Dimensions  
Span 39' 4.4"
12 m
Length 28' 10.5"
8.8 m
Height 12' 3.6"
3.75 m
Wing area 215.3 sq ft
20 sq m
Weight  
Empty 5,952 lb
2,700 kg
Loaded 8,091 lb
3,670 kg
Performance  
Speed at 32,810' / 10,000 m 367 mph
590 kph
Cruising speed 217 mph
350 kph
Climb to 32,810' / 10,000 m 20 minutes
Service ceiling 35,007'
10,670 m
Range 1,243 miles
2,000 km
Armament  
Nose 2: 12.7 mm Ho-103 Type I MG
Wings 2: 20 mm Ho-5
Bombs 2: 551 lb
2: 250 kg
  Kawasaki Ki-100-II
Type Fighter
Crew 1
Engine (Type) Mitsubishi Ha-112-II Ru
Cylinders Radial 14
Cooling Air
Net HP 1,500
Propeller blades 3 metal constant speed
Dimensions  
Span 39' 4", 39' 4 7/16"
12 m
Length 28' 11", 28' 11.25"
8.82 m
Height 12' 3", 12' 3 5/8"
3.75 m
Wing area 215.278 sq ft
20 sq m
Weight  
Empty 5,952 lb
2,700 kg
Loaded 8,091 lb
3,670 kg
Performance  
Speed at 19,685' / 6,000 m 354 mph, 454 mph
570 kph
Speed at 32,810' / 10,000 m 367 mph
590 kph
Speed - Cruising at 13,125' / 4,000 m 249 mph
400 kph
Climb to 16,405' / 5,000 m 6 minutes 40 seconds
Climb to 32,810' / 10,000 m 18 minutes
Service ceiling 36,090'
11,000 m
Range 1,118 miles
Range - Maximum 1,118 miles
1,800 km
Armament 2: MG
2: 20 mm
Fuselage 2: 20 mm Ho-5
Wings 2: 12.7 mm Type 1 / Ho-103
Bombs 1,100 lb
2: 551 lb
2: 250 kg
OR  
Drop Tanks 2: 44 Gallons
2: 200 liter

Sources:

  1. Aircraft of WWII, Stewart Wilson, 1998
  2. World War II Airplanes Volume 2, Enzo Angelucci, Paolo Matricardi, 1976
  3. The Encyclopedia of Weapons of World War II, Chris Bishop, 1998
  4. Japanese Aircraft of the Pacific War, René J Francillon, 1970
20th Century American Military History Crucial Site