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Japan's Imperial Army flag

Japan's Kawasaki Ki-102 fighter; Army Type 4 Assault Plane
Allied code name: Randy

Design

The Ki-45 was to be replaced by the Ki-102.2,4 The designer of the Ki-102 was Takeo Doi.4 To save time it was decided to use the Ki-96 as a bases for the Ki-102.1,3,4

Tail wheel was retractable.3

Each crew member was in their own enclosed cockpits.3

High Altitude Modifications

Six of the pre-production aircraft were modified to be high altitude fighters.3,4 The crew area was modified and Mitsubishi Ha-112-IIru engines were installed.3 Only 15 were eventually delivered because of difficulties with the turbo chargers.3

Prototype

The Ki-102 prototype first flew in March 1944.1,4 Testing showed that the tail wheel strut needed to be taller as the Ki-102 was directionally unstable on the ground.1

Production

In October 1944 the Ki-102 was ordered into production.3,4

  • Prototypes: 34
    • Production: February - March 19443,4
  • Pre-Production: 203,4
    • Production: April - October 19444
  • Prototypes and pre production: 231
  • Kawasaki Ki-102a: 262,4 (6 conversions of pre-production aircraft)4
    • Production / Conversions: June 1944 - March 19454
  • Kawasaki Ki-102b: 2151,2,4
    • Production: October 1944 - July 19454
    • Deliveries began in late 1944.1
  • Total: 2381,4, 2412
    • Manufacturer: Kawasaki Kokuki Kogyo K.K.2,4
  • Conversions:
    • Kawasaki Ki-102a: 64, 261
      • First flew in June 1944.1
    • Kawasaki Ki-102c: 21,3,4
      • Conversion: July - August 19454
      • First flew in July 1945.1

Variants

  • Kawasaki Ki-102a: Heavy fighter.2 High altitude fighter.4 Had Ru-102 superchargers.4 Fifteen delivered to Army.4
  • Kawasaki Ki-102b, Army Type 4 Assault Plane: Ground attack.2,3,4
  • Kawasaki Ki-102c: Night fighter.2,3,4 Engine had superchargers for high altitude flight.1,4 Could carry a 57 mm cannon.2 Fuselage was lengthened and wing area increased to facilitate night landings.4 The radar was in a plexiglas's dome above the fuselage.4 Never saw combat as war ended.4
  • Special Fighter 2: Was to have two Mitsubishi Ha-104 (1,900 HP) engines that would provide greater speed but sacrifice flight time.4 Only on drawing board.4

Usage

Many of the Ki-102s were stationed in Japan to protect the home islands.1

Units

  • Sentais: 28th, 45th4
  • 27th Kokuritsu Dai Shijugo Chutai4

Air-to-Ground Missile

The Ki-102b was used in the Igo-1-B air-to-ground guided missile tests.1,4

Okinawa

Some of the Ki-102s were used over Okinawa.1,3,4

Specifications

  Kawasaki Ki-102
Type Heavy fighter1
Ground attack1
Crew 21
Engine (Type) 2: Mitsubishi Ha-112-II4
Cylinders Radial 144
Cooling Air4
Net HP 1,500 each4
Armament  
Nose 1: 57 mm Ho-4014
Fuselage 2: 20 mm Ho-54
Rear Cockpit 1: 12.7 mm Ho-1034
  Kawasaki Ki-102a
Type Fighter2, High altitude fighter1,4
Crew 22,4
Pilot, radio operator4
Engine (Type) 2: Mitsubishi Ha-112-II Ru1,2,4
Cylinders Radial 142,4
Cooling Air2,4
Net HP 1,500 each1,2,4
Propeller blades 3 each1, 3 metal constant speed4
Dimensions  
Span 51' 1"1,2
15.57 m1
Length 37' 6.75"1, 37' 7"2
11.45 m1
Height 12' 1.75"1, 12' 2"2
3.7 m1
Weight  
Loaded 16,094 lb2
Performance  
Speed at 19,685' / 6,000 m 360 mph2
Service ceiling 32,810'2
Range 1,243 miles2
Armament 1: MG2
Nose 1: 37 mm Ho-2034
1: 57 mm1,2
Forward belly 1: 20 mm1
2: 20 mm2, 20 mm Ho-54
Drop Tanks 2: 44 gallons3,4
2: 200 liter3,4
  Kawasaki Ki-102b
Type Ground attack1,3,4
Crew 23,4
Pilot, radio operator4
Engine (Type) 2: Mitsubishi Ha-112-II1,3,4
OR 2: Mitsubishi Ha-33 624
Cylinders Radial3, Radial 141,4
Cooling Air4
Net HP 1,500 each1,3,4
Propeller blades 3 each1, 3 metal constant speed4
Dimensions  
Span 51' 1"1,3,4
15.57 m1,3,4
Length 37' 6.75"1, 37' 6.78125"4, 37' 6.8"3
11.45 m1,3,4
Height 12' 1.65625"4, 12' 1.7"3, 12' 1.75"1
3.7 m1,3,4
Wing area 365.972 sq ft4, 365.98 sq ft3
34 sq m3,4
Weight  
Empty 10,913 lb1,3,4
4,950 kg1,3,4
Loaded 16,094 lb1,3,4
7,300 kg1,3,4
Performance  
Speed at 19,685' / 6,000 m 360 mph1,3,4
579 kph1, 580 kph3,4
Climb to 16,405' / 5,000 m 6.9 minutes1, 6 minutes 54 seconds4
Service ceiling 32,810'1,4, 36,090'3
10,000 m1,4, 11,000 m3
Range 1,243 miles1,3,4
2,000 km1,3,4
Armament  
Nose 1: 57 mm1 , 57 mm Ho-4013,4
Forward Fuselage 1: 20 mm1
2: 20 mm Ho-53,4
Rear cockpit 1: 12.7 mm MG1,3, 12.7 mm Type 1 Ho-1034
Bombs 2: 551 lb1,3,4
2: 250 kg1,3,4
OR  
Drop Tanks 2: 44 gallons3,4
2: 200 liter3,4
  Kawasaki Ki-102c
Type Night fighter1,3,4
Crew 24
Pilot, radar operator4
Engine (Type) 2: Mitsubishi Ha-112-II Ru1,4
Cylinders Radial 144
Cooling Air4
Net HP 1,500 each1,4
Propeller blades 3 each1, 3 metal constant speed4
Dimensions  
Span 56' 7"1, 56' 7.125"4
17.25 m1,4
Length 42' 9.75"1, 42' 9.78125"4
13.05 m1,4
Height 12' 1.65625"4
3.7 m4
Wing area 430.555 sq ft4
40 sq m4
Weight  
Empty 11,464 lb1,4
5,200 kg1,4
Loaded 16,755 lb1,4
7,600 kg1,4
Performance  
Speed at 32,810' / 10,000 m 373 mph1,4
600 kph1,4
Climb to 32,810' / 10,000 m 18 minutes4
Service ceiling 44,290'1,4
13,5001,4
Range 1,367 miles1,4
2,200 km1,4
Armament  
Forward Fuselage 2: 30 mm1, 30 mm Ho-1053,4
Upward firing in fuselage 2: 20 mm1, 20 mm Ho-53,4
Drop Tanks 2: 44 gallons3,4
2: 200 liter3,4

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