Mitsubishi Ki-30
| Ki-30 | |
|---|---|
| |
| Mitsubishi Ki-30 (Army Type 97 Light Bomber) | |
| Role | Light bomber |
| Manufacturer | Mitsubishi Heavy Industries |
| First flight | 28 February 1937 |
| Introduction | January1938 |
| Primary users | Imperial Japanese Army Air Force Royal Thai Air Force |
| Produced | 1938–1941 |
| Number built | 704 |
TheMitsubishi Ki-30(Chín bảy thức khinh bạo kích cơ,Kyunana-shiki keibakugekiki,lit. ''Type 97 light bomber'')was aJapaneselight bomberofWorld War II.It was a single-engine,mid-wing,cantilevermonoplaneofstressed-skinconstruction with a fixedtailwheel undercarriageand a long transparentcockpitcanopy.The type had significance in being the first Japanese aircraft to be powered by a modern two-rowradial engine.During the war, it was known by theAlliesbythe nameAnn.It was mistakenly identified by the British as the Mitsubishi Army 97 Ann.[1]
Design and development
[edit]The Ki-30 was developed in response to a May 1936Imperial Japanese Armyspecification to replace theKawasaki Ki-3lightbomberwith a completely indigenously designed and built aircraft. Mitsubishi andKawasakiwere requested to build twoprototypeseach by December 1936. The specification called for a top speed of 400 km/h (250 mph) at 3,000 m (9,840 ft); normal operating altitude from 2,000 m (6,560 ft) to 4,000 m (13,130 ft), the ability to climb to 3,000 m (9,840 ft) within eight minutes and an engine to be selected from the 634 kW (850 hp)Mitsubishi Ha-6radial, 615 kW (825 hp)Nakajima Ha-5radial, or 634 kW (850 hp)Kawasaki Ha-9-IIb liquid-cooled inline engines, a normal bomb load of 300 kg (660 lb) and a maximum of 450 kg (990 lb), one forward-firingmachine gunand one flexible rearward-firing machine gun, the ability to perform 60° dives fordive bombing,and a loaded weight less than 3,300 kg (7,280 lb).[2]
The first Mitsubishiprototypeflew on 28 February 1937 powered by a Mitsubishi Ha-6 radial. Originally, designed with a retractable mainlanding gear,wind tunneltests indicated that the gain in speed was minimal due to the landing gear's extra weight and complexity and a fixed arrangement with "spatted"main wheels was chosen instead. The wing was mounted at a point above the line of the aircraft's belly in order to fully enclose thebomb baywithin thefuselage.The pilot sat just above theleading edgeof the wing, and the rear-gunner/radio-operator just behind the wingtrailing edge,in a long "greenhouse"canopywhich gave both crewmen excellent all-around vision. The Ha-6 engine drove a three-blade variable-pitchpropeller.[3]
A second prototype, fitted with the slightly more powerful Nakajima Ha-5 engine, was completed the same month. Although two months behind schedule and overweight, both prototypes met or exceeded every other requirement. The second prototype's top speed of 423 km/h (263 mph) at 4,000 m (13,130 ft) led theImperial Japanese Army Air Forceto place an order for 16 service trials machines. These were delivered in January 1938 and the result of the trials was that the Army ordered the Ki-30 into production in March under the designationArmy Type 97 Light bomber.[4]
Mitsubishi built 618 production machines through April 1940, and the 1st Army Air Arsenal (Tachikawa Dai-Ichi Rikugun Kokusho) built 68 more by the time production ceased in September 1941. Including prototypes, a total of 704 Ki-30s were built.[5]
Operational history
[edit]
The Ki-30s were first used in combat inSecond Sino-Japanese Warfrom spring 1938. It proved to be reliable in rough field operations, and highly effective while operating withfighterescort. This success continued in the early stages of thePacific War,and the Ki-30s participated extensively in operations in thePhilippines.However, once unescorted Ki-30s metAlliedfighters, losses mounted rapidly and the type was soon withdrawn to second-line duties. By the end of 1942, most Ki-30s were relegated to atrainingrole. Many aircraft were expended inkamikazeattacks towards the end of the war.[6]
From late 1940, the Ki-30 was in service with theRoyal Thai Air Force,and saw combat in January 1941 against theFrenchinFrench Indochinain theFrench-Thai War.24 aircraft were delivered, and were nicknamedNagoyaby the crews.[7]Additional Ki-30s were transferred from Japan in 1942.
Operators
[edit]World War II
[edit]
- Imperial Japanese Army Air Force[6]
- No. 82 Dokuritsu Hikō Chutai IJAAF
- No. 87 Dokuritsu Hikō Chutai IJAAF
- No. 6 Hikō Sentai IJAAF
- No. 16 Hikō Sentai IJAAF
- No. 31 Hikō Sentai IJAAF
- No. 32 Hikō Sentai IJAAF
- No. 35 Hikō Sentai IJAAF
- No. 90 Hikō Sentai IJAAF
Post-war
[edit]
- Chinese Communist Air Force– Operated three captured Ki-30s used as trainers until the early 1950s.
Specifications (Ki-30)
[edit]
Data fromJapanese Aircraft of the Pacific War[8]
General characteristics
- Crew:2
- Length:10.35 m (33 ft 11 in)
- Wingspan:14.55 m (47 ft 9 in)
- Height:3.65 m (12 ft 0 in)
- Wing area:30.58 m2(329.2 sq ft)
- Empty weight:2,230 kg (4,916 lb)
- Gross weight:3,320 kg (7,319 lb)
- Powerplant:1 ×Nakajima Ha5-Kai14-cylinder air-cooled radial piston engine, 708 kW (949 hp)
- Propellers:3-bladed variable-pitch propeller
Performance
- Maximum speed:423 km/h (263 mph, 228 kn)
- Cruise speed:380 km/h (240 mph, 210 kn)
- Never exceed speed:442 km/h (275 mph, 239 kn)
- Range:1,700 km (1,100 mi, 920 nmi)
- Service ceiling:8,570 m (28,120 ft)
- Rate of climb:8.33 m/s (1,640 ft/min)
- Wing loading:108.6 kg/m2(22.2 lb/sq ft)
Armament
- Guns:2× 7.7 mm (0.303 in)Type 89 machine guns(one fixed wing-mounted and another manually aimed from the rear cockpit)
- Bombs:400 kg (882 lb) bombload
See also
[edit]Aircraft of comparable role, configuration, and era
- Kawasaki Ki-32
- Mitsubishi Ki-51
- Heinkel He 70
- Fairey Battle
- PZL.23 Karaś
- Sukhoi Su-2
- Vultee A-35 Vengeance
Related lists
Notes
[edit]- ^Lawrence 1945,p. 192.
- ^Francillon 1979,p. 165.
- ^Francillon 1979,pp. 165–166.
- ^Francillon 1979,p. 166.
- ^Francillon 1979,p. 168.
- ^abFrancillon 1979,p. 167.
- ^Garlicki, Jarosław (2001).Historia lotnictwa wojskowego Królestwa Tajlandii w latach 1912 – 1945. Część 3. Wojna tajsko-francuska."Militaria i Fakty". 4/2001, p. 37(in Polish)
- ^Francillon 1979,pp. 167–168.
Bibliography
[edit]- Francillon, René J. (1979).Japanese Aircraft of the Pacific War.London: Putnam & Company Ltd.ISBN0-370-30251-6.
- Gunston, Bill (1999).The Illustrated Directory of Fighting Aircraft of World War II.London: Zenith Press.ISBN0-86101-390-5.
- Lake, Jon (2002).Great Book of Bombers.London: Zenith Press.ISBN0-7603-1347-4.
- Lawrence, Joseph (1945).The Observer's Book Of Airplanes.London and New York: Frederick Warne & Co.
- Mikesh, Robert C.; Shorzoe Abe (1990).Japanese Aircraft 1910–1941.Annapolis, MD: Naval Institute Press.ISBN1-55750-563-2.
- Mondey, David (2002).The Concise Guide to Axis Aircraft of World War II.London: Chancellor Press.ISBN1-85152-966-7.
- Soumille, Jean-Claude (September 1999). "Les avions japonais aux coleurs françaises" [Japanese Aircraft in French Colors].Avions: Toute l'Aéronautique et Son Histoire(in French) (78): 6–17.ISSN1243-8650.
- Young, Edward M. (1984). "France's Forgotten Air War".Air Enthusiast.No. 25. pp. 22–33.ISSN0143-5450.
External links
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