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The Mitsubishi J2M Raiden (雷電, "Lightning Bolt") is a single-engined land-based fighter aircraft used by the Imperial Japanese Navy Air Service in World War II. The Allied reporting name was "Jack".

J2M Raiden
Profile view of a Mitsubishi J2M Raiden
Role	Fighter aircraft Type of aircraft
Manufacturer	Mitsubishi Heavy Industries
First flight	20 March 1942
Introduction	December 1942
Retired	August 1945
Primary user	Imperial Japanese Navy
Number built	621

Design and development

The J2M was designed by Jiro Horikoshi, creator of the A6M Zero, to meet the 14-Shi (14th year of the Showa reign, or 1939) official specification. It was to be a strictly local-defense interceptor, intended to counter the threat of high-altitude bomber raids, and thus relied on speed, climb performance, and armament at the expense of manoeuvrability. The J2M was a sleek, but stubby craft with its oversized Mitsubishi Kasei engine buried behind a long cowling, cooled by an intake fan and connected to the propeller with an extension shaft.

Teething development problems stemming from the Kasei engine cooling system, and the main undercarriage members led to a slowdown in production.[1] A continual set of modifications resulted in new variants being introduced with the ultimate high-altitude variant, the J2M4 Model 34 flying for the first time in August 1944. It had a 1,420 hp Kasei 23c engine equipped with a turbocharger (mounted in the side of the fuselage just behind the engine) that allowed the rated power to be maintained up to 9,100 m (29,900 ft). Two upward-aimed, oblique-firing (aimed at seventy degrees) 20 mm cannons, mounted in the German Schräge Musik style, were fitted behind the cockpit with the four wing cannons retained. Unresolved difficulties with the turbo supercharger caused the project to be terminated after only two experimental J2M4s were built.

Operational history

The first few produced J2M2s were delivered to the development units in December 1942 but severe problems were encountered with the engines. Trials and improvements took almost a year and the first batch of the serial built J2M2 Model 11 was delivered to 381st Kōkūtai in December 1943. Parallel with the J2M2, production of the J2M3 Raiden Model 21 started. The first J2M3s appeared in October 1943 but deliveries to combat units started at the beginning of February 1944.

The Raiden made its combat debut in June 1944 during the Battle of the Philippine Sea. Several J2Ms operated from Guam and Saipan and a small number of aircraft were deployed to the Philippines. Later, some J2Ms were based in Japanese airfields in Korea under Genzan Ku: Genzan (Wonsan); Ranan (Nanam); Funei (Nuren); Rashin (Najin); and Konan, for defense of these areas and fighting against Soviet Naval Aviation units.

Primarily designed to defend against the Boeing B-29 Superfortress, the type was handicapped at high altitude by the lack of a turbocharger. However, its four-cannon armament supplied effective firepower and the use of dive and zoom tactics allowed it to score occasionally.

Insufficient numbers and the American switch to night bombing in March 1945 limited its effectiveness.

J2Ms took part in one of the final aerial combats of the Second World War when four Raidens, accompanied by eight Mitsubishi A6M Zeros, all belonging to the 302nd Kokutai, intercepted a formation of US Navy F6F Hellcats from the aircraft-carrier USS Yorktown (CV-10) during the morning of 15 August 1945 over the Kanto Plain. In the engagement, that took place only two hours before Japan officially announced its surrender, four Hellcats were lost along with two Raidens and two Zeros.[2]

U.S. Technical Air Intelligence Command (TAIC) tested two captured J2Ms using 92 octane fuel plus methanol and calculated maximum speeds using measurements. The J2M2 (Jack11) achieved a speed of 655 km/h (407 mph) at 5,520 m (17,400 ft),[3] and the J2M3 (Jack21) achieved a speed of 671 km/h (417 mph) at 4,980 m (16,600 ft).[3]

Variants

• J2M1 Prototype: fitted with the 1,044 kW (1,400 hp) Mitsubishi MK4C Kasei 13 14-cylinder air-cooled radial engine, and armed with two 7.7 mm (.303 in) Type 97 machine guns in the upper fuselage and two wing-mounted 20 mm Type 99 Model II cannon. - Eight builds.
• J2M2 Model 11: Powered by 1,379 kW (1,850 hp) Mitsubishi MK4R-A Kasei 23a 14-cylinder radial engine, same armament as the J2M1.
• J2M3 Model 21: Armed with two wing-mounted 20 mm Type 99 Model II cannon and two wing-mounted 20 mm Type 99 Model I cannon.
• J2M3a Model 21A: Armed with four wing-mounted 20 mm Type 99 Model II cannon.
• J2M4 Model 32: Prototype fitted with the 1,357 kW (1,820 hp) Mitsubishi MK4R-C Kasei 23c engine. Many armament configurations have been reported, e.g., fuselage-mounted oblique-firing 20 mm Type 99 Model I cannon designed to fire upward as it passed underneath a bomber, two wing-mounted 20 mm Type 99 Model II cannon, and two wing-mounted 20 mm Type 99 Model I cannon.
• J2M5 Model 33: High altitude variant powered by 1,357 kW (1,820 hp) Mitsubishi MK4U-A Kasei 26a engine with mechanically driven supercharger, giving increased high-altitude speed at the expense of range. Two 20 mm Type 99 cannon in fuselage, two 20 mm Type 99 Model II cannon in wings.[4]
• J2M5a Model 33A: Armed with four wing-mounted 20 mm Type 99 Model II cannon. Wing cannon were harmonized in trajectory and ballistics with each 200 rpg.
• J2M6 Model 31: Chronologically earlier than J2M4 and J2M5 this version was based on J2M3. Had wider cockpit and improved bubble canopy later used in J2M3 built since July 1943.
• J2M6a Model 31A: Chronologically earlier than J2M4 and J2M5 this version was based on J2M3a.
  Had wider cockpit and improved bubble canopy later used in J2M3a built since July 1943. One J2M6a was built.
• J2M7 Model 23A: J2M3 powered by Kasei 26a engine, a few built.
• J2M7a Model 23A: J2M3a powered by Kasei 26a engine, a few built.

Production

After the decisive Battle of Midway in 1942 Japan's military leaders rushed to re-equip their forces for defense of the home islands. In fighter designs the interceptor role now took priority over forward projection of offensive power. Allied forces, meanwhile, sought to establish air superiority over Japanese-held territories via B-29 bombing raids on industrial targets.

The struggle to meet production demands sparked a Japanese initiative to recruit shonenko (child labour) from Taiwan (Formosa). Though the target of 25,000 youths was never reached, over 8,400 Taiwanese youths aged 12 to 14 relocated to Mitsubishi plants to help build the J2M Raiden.[5][6][7]

The Allied advance took its toll. In 1945 aircraft production in Japan collapsed, as numbers for the J2M reflect.

J2M Production: Nagoya, Mitsubishi Jukogyo K.K. [8]
Year
	Jan.	Feb.	Mar.	Apr.	May	June	July	Aug.	Sept.	Oct.	Nov.	Dec.	Annual
1942			1	1	1	2	2	1	1	1	1	2	13
1943	0	0	1	2	0	0	3	4	5	16	21	22	90
1944	17	26	9	22	39	44	34	22	16	20	18	7	274
1945	17	12	29	16	0	8	7	27					116
Total													493

• Allied bombing raids began in December 1944 and progressively disrupted production of the J2M. A direct hit on the Mitsubishi Dai San Kokuki Seisakusho aircraft plant caused the complete loss of airframes, machine tools, and jigs. This halted further production.[9]

J2M Production: Kanagawa, Kōza K.K. [10]
Year
	Jan.	Feb.	Mar.	Apr.	May	June	July	Aug.	Sept.	Oct.	Nov.	Dec.	Annual
1944					1	0	0	1	2	3	4	6	17
1945	13	8	23	15	10	20	22	0					111
Total													128

• Production generally suffered less from direct hits on factories, which were rare, but from attacks on suppliers and consequent shortages of material and construction tools.[11]

Operators

 Japan

• Imperial Japanese Navy Air Service
  • 256th Kōkūtai November 1944 - December 1945
  • 301st Kōkūtai February 1944 - July 1945
  • 302nd Kōkūtai March 1945 - August 1945
  • 332nd Kōkūtai August 1944 - August 1945
  • 352nd Kōkūtai August 1944 - August 1945
  • 381st Kōkūtai End 1943 - April 1945
  • Yokosuka Kōkūtai
  • Yatabe Kōkūtai
  • Genzan Kōkūtai
  • Tainan Kōkūtai
  • Konoike Kōkūtai
  • Chushi Kōkūtai

Surviving aircraft

J2M3 Model 21 c/n 3014 is on display at the Planes of Fame museum in Chino, California.[12]

Specifications (J2M3)

Data from Japanese Aircraft of the Pacific War,[13] Mitsubishi J2M3-21 Raiden[3]

General characteristics

• Crew: 1
• Length: 9.945 m (32 ft 8 in)
• Wingspan: 10.8 m (35 ft 5 in)
• Height: 3.81 m (12 ft 6 in)
• Wing area: 20.05 m² (215.8 sq ft)
• Empty weight: 2,839 kg (6,259 lb)
• Gross weight: 3,211 kg (7,079 lb)
• Powerplant: 1 × Mitsubishi MK4R-A Kasei 23a 14-cylinder air-cooled radial piston engine, 1,300 kW (1,800 hp) for take-off

1,174 kW (1,575 hp) at 1,800 m (5,906 ft)

1,051 kW (1,410 hp) at 4,800 m (15,748 ft)

• Propellers: 4-bladed constant-speed metal propeller

Performance

• Maximum speed: 587 km/h (365 mph, 317 kn) at 5,300 m (17,388 ft)
• Cruise speed: 351 km/h (218 mph, 190 kn)
• Range: 1,898 km (1,179 mi, 1,025 nmi)
• Service ceiling: 11,700 m (38,400 ft)
• Time to altitude: 6,000 m (19,685 ft) in 6 minutes 14 seconds
• Wing loading: 171.3 kg/m² (35.1 lb/sq ft)
• Power/mass: 0.391 kW/kg (0.238 hp/lb)

Armament

• 2x 20 mm (0.787 in) Type 99 Mark 2 machine gun inboard wing-mounted with 190 rpg[14]
• 2x Type 99 Mark 1 machine gun outboard wing-mounted with 210 rpg[14]
• 2× 60 kg (132 lb) bombs

or

• 2 × 200 l (53 US gal; 44 imp gal) drop tanks or a larger central drop tank

See also

Aircraft of comparable role, configuration, and era

• Blohm & Voss BV 155
• Curtiss XP-62
• Focke-Wulf Ta 152
• Hawker Tempest
• Lavochkin La-5FN
• Kawanishi N1K-J Shiden
• Mikoyan-Gurevich I-211
• Nakajima Ki-84
• Polikarpov VP
• Republic XP-69
• Supermarine Spitfire Mk VI/IX
• Yakovlev Yak-9PD

Related lists

• List of aircraft of World War II
• List of aircraft of Japan, World War II
• List of fighter aircraft

Notes

Bibliography

• The Complete Encyclopedia of World Aircraft New York: Barnes & Noble, 1977. ISBN 0-7607-0592-5.
• Francillon, René J. (1979). Japanese aircraft of the Pacific War. London: Putnam. ISBN 0-370-30251-6. OCLC 6124909. (new edition 1987 by Putnam Aeronautical Books, ISBN 0-85177-801-1.)
• Green, William. Air Enthusiast Magazine, Quarterly Volume 1, Number 2 Bromley, Kent: Pilot Press, 1971.
• Green, William. Warplanes of the Second World War, Volume Three: Fighters. London: Macdonald & Co. (Publishers) Ltd., 1973, First edition 1961. ISBN 0-356-01447-9.
• Huggins, Mark (January–February 2004). "Hunters over Tokyo: The JNAF's Air Defence of Japan 1944–1945". Air Enthusiast (109): 66–71. ISSN 0143-5450.
• Izawa, Yasuho & Holmes, Tony. J2M Raiden and N1K1/2 Shiden/Shiden-Kai Aces. Bloomsbury Publishing. 2016. ISBN 0-147-28126-1.
• Ledet, Michel & Osuo, Katshuhiko (January 2001). "Mitsubishi J2M Raiden: l'intercepteur de la Marine japonaise" [Mitsubishi J2M Raiden: The Japanese Navy's Interceptor]. Avions: Toute l'Aéronautique et son histoire (in French) (94): 8–16. ISSN 1243-8650.
• Ledet, Michel & Osuo, Katshuhiko (February 2001). "Mitsubishi J2M Raiden: l'intercepteur de la Marine japonaise". Avions: Toute l'Aéronautique et son histoire (in French) (95): 20–28. ISSN 1243-8650.
• United States Strategic Bombing Survey Aircraft Division. Mitsubishi Heavy Industries, Ltd. Corporation Report I, Washington, D.C. 1947.
• United States Strategic Bombing Survey Aircraft Division. Army Air Arsenal and Navy Air Depots Corporation Report XIX, Washington, D.C. 1947.

External links

• J2M article on www.combinedfleet.com
• "Song of Raiden fighter squadron", Nippon News, No. 254. in the official website of NHK.

На других языках

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[de] Mitsubishi J2M

Die Mitsubishi J2M Raiden (dt.: Donnerschlag, alliierter Codename: Jack) war ein Abfangjäger des japanischen Herstellers Mitsubishi, der während des Zweiten Weltkriegs von den Kaiserlich Japanischen Marineluftstreitkräften eingesetzt wurde.

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- [en] Mitsubishi J2M

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[fr] Mitsubishi J2M

Le Mitsubishi J2M Raiden 'Jack' était un avion de chasse, intercepteur pur, basé à terre et exclusivement utilisé par la Marine impériale japonaise pendant la dernière partie de la Deuxième Guerre mondiale.

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[it] Mitsubishi J2M

Il Mitsubishi J2M Raiden (雷電 fulmine?) così indicato in base alle convenzioni allora vigenti, al quale venne assegnato dagli Alleati il nome in codice Jack[2] fu un aereo da caccia monomotore monoplano ad ala bassa sviluppato dall'azienda aeronautica giapponese Mitsubishi Jūkōgyō nei primi anni quaranta.

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[ru] Mitsubishi J2M Raiden

Береговой перехватчик Гром (Райдэн) ВМС Императорской Японии (яп. 局地戦闘機「雷電」/三菱J2M Кёкутисэнтоки Райдэн/Мицубиси Дзэй-Ни-Эму)[1] — одноместный цельнометаллический истребитель-перехватчик берегового базирования на вооружении ВМС Императорской Японии. Разработан в авиационном КБ Мицубиси в 1940—1942 гг., строился малой серией до конца войны. Условное обозначение ВВС союзников Джек (Jack)

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