Kawasaki Ki-102 (Randy) Ground Attack / Heavy Fighter / Night Fighter (1944)
The Kawasaki Ki-102 was developed specifically to replace the Kawasaki Ki-45 Toryu series of heavy fighters.
With the apparent success of their Ki-45 "Toryu" twin-engine heavy fighter line, Kawasaki turned to developing an improved form as a private venture. Development ensued in 1942 and more or less followed the same design principles inherent in the Ki-45 before it. The new design included a twin-engine configuration with a crew of two, the fuselage intended to fit heavy cannon-minded armament to counter the American bomber presence. However, the Japanese Army requested the type be designed as a single-seat heavy fighter which forced Kawasaki to rework the design. A revised prototype went airborne in September of 1943 while a further two prototypes soon followed. The Japanese Army liked what it saw from the new Ki-96 performance-wise though a new initiative requested the Ki-96 be redesigned as a two-seat, twin-engine heavy fighter - essentially the original Ki-96 vision. The design was once again reworked, this time to become the new "Ki-102" which retained the former design's wing and tail assemblies while incorporated new additions where needed. Ki-96 development was, therefore, discontinued with only three prototypes completed.
The Ki-102 was born from three prototype forms using the base "Ki-102" designator. "Ki-102a" marks signified the original high-altitude heavy fighter design form of which a total of the 26 of the type were ultimately produced. All combat models were fitted with 1 x 37mm Ho-203 series cannon and 2 x 20mm Ho-5 cannons as well as turbosupercharged engines required for high altitude performance. The Ki-102a was known to the Japanese as the "Type Ko".
Outwardly, the series followed in line with previous twin-engine Kawasaki offerings. The design was characterized by a streamlined fuselage with the tandem-seating crew cabin at forward-middle, low-mounted monoplane wings, leading edge radial engine nacelles and a conventional single-fin tail unit. The undercarriage consisted of two main landing gear legs and a tail wheel while all was completely retractable into the underfuselage. The pilot sat in a forward cockpit under a glazed canopy with decent vision outwards while the rear crewman sat in a separated cockpit at amidships.
The Ki-102b became a follow-up specialized ground attack variant fitting 1 x 57mm Ho-401 cannon as well as 2 x 20mm Ho-5 cannons. 1 x 12.7mm Ho-103 (Type 1) heavy machine gun was allocated to the rear cockpit for self-defense against trailing enemy fighters. Power was derived from 2 x Mitsubishi Ha-112-II Ru 14-cylinder radial piston engines of 1,500 horsepower each which gave excellent performance. The Ki-102b reported a top speed of 360 miles per hour with a range equal to 1,200 miles while the service ceiling was in the vicinity of 33,000 feet. A reengineered tailwheel was also introduced. Some 207 examples were built in all, proving the definitive mark in the series and was known to the Japanese as the "Type Otu". The Ki-102b production mark would be the only Ki-102 form to see combat action, this over Okinawa and its exposure very limited.
The Ki-102c was a proposed dedicated night-fighter development with various changes included in her design. This brought about use of a very basic AI radar system under a new Plexiglas nose cone, a lengthened wing assembly and fuselage and reworked tail planes. Armament comprised 2 x 30mm Ho-105 series cannons under the fuselage as well as 2 x 20mm Ho-5 "oblique-firing cannons" at amidships. The oblique-firing cannons were set in a forward-angled position, allowing the fighter to hover under and behind a bomber target (typically its most vulnerable spot) and fire cannon projectiles at will. However, only two of the type were ever completed before the end of the war. The Ki-102c was known to the Japanese as the "Type Hei".
All Ki-102 variants featured provision for the carrying of 2 x 550lb conventional drop bombs for strike sorties or 2 x fuel drop tanks for increased operational ranges.
The "Ki-108" was a related Ki-102 development of which only two prototypes were completed, converted from existing Ki-102b series airframes. These were to be the beginnings of a new high-altitude fighter design complete with a pressurized flight cabin for the crew and strengthened airframe. The end of the war signified the end of this development. Text ©2003-2013 www.MilitaryFactory.com • All Rights Reserved • No Reproduction Permitted
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Specifications for the
Kawasaki Ki-102 (Randy)
Ground Attack / Heavy Fighter / Night Fighter
Country of Origin: Imperial Japan
Manufacturer: Kawasaki - Imperial Japan
Initial Year of Service: 1944
Production: 238
Focus Model: Kawasaki Ki-102 (Randy)
Crew: 2
Length: 37.57ft (11.45m)
Width: 51.08ft (15.57m)
Height: 12.14ft (3.70m)
Weight (Empty): 10,913lbs (4,950kg)
Weight (MTOW): 16,094lbs (7,300kg)
Powerplant: 2 x Mistubishi Ha-112-II radial piston engines developing 1,500 horsepower each.
Maximum Speed: 360mph (580kmh; 313kts)
Maximum Range: 1,243miles (2,000km)
Service Ceiling: 36,089ft (11,000m; 6.8miles)
Rate-of-Climb: 0 feet per minute (0m/min)
Hardpoints: 2
Armament Suite:
Ki-102a:
1 x 37mm Ho-203 cannon in nose
2 x 20mm Ho-5 cannons
Ki-102b:
1 x 57mm Ho-401 cannon in nose
2 x 20mm Ho-5 cannons
1 x 12.7mm Ho-103 heavy machine gun in trainable rear cockpit position.
Ki-102c:
2 x 30mm Ho-105 cannons in fuselage belly
2 x 20mm Ho-5 cannons in oblique-firing position.
OPTIONAL (All Variants):
2 x 550lb bombs OR 2 x fuel drop tanks
2 x 550lb bombs OR 2 x fuel drop tanks
Variants:
Ki-102 - Encompassing 3 prototypes plus 20 pre-production aircraft.
Ki-102a - Heavy Fighter; 1 x 37mm cannon and 2 x 20mm cannons; 26 examples produced.
Ki-102b - Ground Attack; 1 x 57mm cannon; 2 x 20mm cannons; 1 x 12.7mm heavy machine gun in rear cockpit; 207 examples produced.
Ki-102c - Night-Fighter; fitted with primitive AI radar under Plexiglas nose cone; 2 x 30mm cannons; 2 x 20mm cannons in oblique-firing position; 2 examples completed.
Ki-108 - Proposed high-altitude fighter prototype; pressurized cockpit; two examples modified from existing Ki-102b production mounts.
Operators: Imperial Japan
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