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The Kawasaki Ki-102 (Army Type 4 assault aircraft) was a Japanese warplane of World War II. It was a twin-engine, two-seat, long-range heavy fighter developed to replace the Ki-45 Toryu. Three versions were planned: the Ki-102a day fighter, Ki-102b ground-attack and Ki-102c night fighter. This aircraft's Allied reporting name was "Randy".

Ki-102
Kawasaki Ki-102b assault plane Model b
Role	Attacker, night fighter Type of aircraft
National origin	Japan
Manufacturer	Kawasaki Kōkūki Kōgyō K.K.
First flight	1944
Introduction	1944
Retired	1945
Status	Retired
Primary user	Imperial Japanese Army Air Force
Number built	238
Developed from	Kawasaki Ki-96

Design and history

The Ki-102 entered service in 1944, but saw limited action. The main type (102b) was kept in reserve to protect Japan, although it did see some limited duty in the Okinawa campaign. It was kept out of front line service because it was hoped that it would be the carrier of the Igo-1-B air-to-ground guided missile when the Allied invasion of Japan occurred.

Variants

Ki-102

prototypes, three built

Ki-102a (Type Kō)

Externally similar to the 102b, but with turbosuperchargers that enabled the engine to maintain its rating at higher altitudes. The 57 mm (2.24 in) cannon was swapped in favor of a 37 mm (1.46 in) cannon, and the 12.7 mm (.50 in) rear gun was deleted, 26 built.

Ki-102b (Type Otsu)

Ground-attack variant similar to prototypes, except with revised tail wheel, 207 built

Ki-102c (Type Hei)

Night fighter version with lengthened fuselage and span. Radar under a Plexiglas dome, oblique-firing 20 mm cannons, and the 20 mm cannons in the belly replaced with 30 mm (1.18 in) cannons in Schräge Musik behind the cockpit, two built.

Ki-108

High-altitude fighter prototype with pressurised cabin, two conversions from Ki-102b aircraft using the structural improvements used on the 102c.

Ki-108 Kai

Improved version of the Ki-108 with longer fuselage and enlarged wings. Two built.

Specifications (Ki-102b)

Data from Japanese Aircraft of the Pacific War[1]

General characteristics

• Crew: 2
• Length: 11.45 m (37 ft 7 in)
• Wingspan: 15.57 m (51 ft 1 in)
• Height: 3.7 m (12 ft 2 in)
• Wing area: 34 m² (370 sq ft)
• Airfoil: root: NACA 24015; tip: NACA 23010[2]
• Empty weight: 4,950 kg (10,913 lb)
• Gross weight: 7,300 kg (16,094 lb)
• Powerplant: 2 × Mitsubishi Ha112-II Ru 14-cylinder air-cooled radial engine, 1,120 kW (1,500 hp) each
• Propellers: 3-bladed constant-speed propellers

Performance

• Maximum speed: 580 km/h (360 mph, 310 kn)
• Range: 2,000 km (1,200 mi, 1,100 nmi)
• Service ceiling: 10,000 m (33,000 ft)
• Rate of climb: 11.9 m/s (2,340 ft/min)
• Power/mass: 0.417 kW/kg (0.254 hp/lb)

Armament

• Guns:
  
  • 1 × 57 mm (2.24 in) Ho-401 cannon—replaced in the 102a with a 37 mm (1.46 in) Ho-204 cannon, deleted in the 102c
  • 2 × 20 mm Ho-5 cannon in the belly—replaced in the 102c with 30 mm (1.18 in) cannon in the package, plus oblique-firing 2 × 20 mm cannon
  • 1 × 12.7 mm (0.50 in) Ho-103 machine gun (deleted in the Ki-102a and Ki-102)
• Bombs:
  
  • 2 × 200 L (53 US gal) drop tanks; or
  • 2 × 250 kg (551 lb) bombs or
  • 1 × Kawasaki Igo-1b guided missile

See also

Related development

• Kawasaki Ki-96

Aircraft of comparable role, configuration, and era

• Bristol Beaufighter
• de Havilland Mosquito
• Douglas A-26 Invader
• Grumman F7F Tigercat
• Henschel Hs 129
• Messerschmitt Me 410
• Mitsubishi Ki-83
• Nakajima J1N
• Rikugun Ki-93

Related lists

• List of aircraft of Japan during World War II
• List of aircraft of World War II

References

Further reading

• Francillon, René J. Ph.D. (1979). Japanese aircraft of the Pacific War (2nd ed.). London: Putnam. pp. 137–138. ISBN 0-370-30251-6.
• Green, William (1973). War Planes of the Second World War. v. 3 (Seventh impression ed.). London: Macdonald & Co. ISBN 0-356-01447-9.
• Green, William; Swanborough, Gordon (1976). Japanese Army Fighters / 1. London: Macdonald and Jane's. ISBN 0-356-08224-5.

На других языках

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[de] Kawasaki Ki-102

Die Kawasaki Ki-102 „Randy“ (japanisch: キ102) war ein japanisches Jagdflugzeug im Zweiten Weltkrieg.

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- [en] Kawasaki Ki-102

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[fr] Kawasaki Ki-102

Le Kawasaki Ki-102 (キ102 en japonais) était un chasseur lourd japonais de la Seconde Guerre mondiale, les Alliés le surnommèrent Randy. C'était un avion bimoteur, biplace, possédant un large rayon d'action, développé pour remplacer le Kawasaki Ki-45 Toryu. Trois versions furent planifiées : Le Ki-102a (chasseur de jour), Ki-102b (Attaque au sol) et le Ki-102c (chasseur de nuit). Le Randy aurait constitué un excellent remplaçant si son développement n'avait pas coïncidé avec la débâcle du Japon.

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[it] Kawasaki Ki-102

Il Kawasaki Ki-102 (川崎 キ-102 Kawasaki ki hyakuni?), identificato anche come Aereo da attacco Tipo 4 (四式襲撃機 Yon-shiki shūgekiki?), Aereo da caccia biposto Tipo 5 (五式複座戦闘機 Go-shiki fukuza sentōki?), Aereo da attacco bimotore Tipo 5 (五式双発襲撃機 Go-shiki sōhatsu shūgekiki?), nome di identificazione alleato Randy[2], fu un aereo militare multiruolo bimotore, biposto e monoplano ad ala bassa, sviluppato dalla giapponese Kawasaki Kōkūki Kogyo, divisione aeronautica della Kawasaki Heavy Industries, nei primi anni quaranta.

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[ru] Kawasaki Ki-102

Ki-102 (яп. キ102), штурмовик армейский тип 4 (яп. 四式襲撃機) — двухмоторный цельнометаллический перехватчик ПВО Сухопутных войск Императорской Японии. Условное обозначение РУ ВВС США Рэнди (Randy). Принят на вооружение Сухопутных войск Императорской Японии в 1944 г., выпускался опытной серией до окончания Второй мировой войны.

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