Difference between revisions of "A7M (Family)"
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==Description== | ==Description== | ||
| − | The '''Mitsubishi A7M''' | + | The '''Mitsubishi A7M''', designated as '''Reppū ({{Annotation|烈風|Strong Wind}})''', was a series of Japanese fighter aircraft designed and built by Mitsubishi Heavy Industries during World War II. The '''A7M''' was intended to replace the '''[[A6M (Family)|A6M]]''' as the Imperial Japanese Navy's main carrier-based fighter. The A7M had a more powerful engine, a larger wing, and improved manoeuvrability and speed than the Zero. However, the A7M faced many technical difficulties and delays, and only a few prototypes were completed before the end of the war. |
Nicknames being: | Nicknames being: | ||
| Line 9: | Line 9: | ||
==Vehicles== | ==Vehicles== | ||
| − | ===Rank | + | ===Rank IV=== |
* [[A7M1 (NK9H)]] - <small>Reppū Prototype 2</small> | * [[A7M1 (NK9H)]] - <small>Reppū Prototype 2</small> | ||
| Line 15: | Line 15: | ||
==History== | ==History== | ||
| − | Very soon after the [[A6M2 mod. 11|A6M2 mod.11]] started entering the production phase in end-1940 the Japanese Navy already requested Mitsubishi to design a direct successor of the A6M which would be dubbed as the ''16-shi''. But at the time there was no viable high-output as calculations by Jiro Horikoshi's development team who designed the [[A6M (Family)|A6M]], suggested that | + | Very soon after the [[A6M2 mod. 11|A6M2 mod.11]] started entering the production phase in end-1940 the Japanese Navy already requested Mitsubishi to design a direct successor of the A6M, which would be dubbed as the ''16-shi''. But at the time, there was no viable high-output as calculations by Jiro Horikoshi's development team who designed the [[A6M (Family)|A6M]], suggested that to have a climb rate and top speed needed by the Navy they would have to use a minimum of 2,000hp engine. This proved to be an exceptional challenge as the two engines which theoretically could develop this power were still under development. Besides that, Horikoshi's team were still occupied with engineering the [[A6M2|A6M2 mod.21]] and designing the ''14-shi'' interceptor (which would later be known in service as the [[J2M (Family)|J2M]]), for these reasons Mitsubishi put the plans for a Zero-successor on hold in January of 1941. |
===Development=== | ===Development=== | ||
In April of 1942, development of the [[A6M3|A6M3 mod.32]] and [[J2M2|J2M2 mod.11]] were finished and the navy once again tasked Mitsubishi and Horikoshi's team to design a new zero successor dubbed this time as the ''17-shi Ko''. The Navy requirements for the 17-shi were as followed: | In April of 1942, development of the [[A6M3|A6M3 mod.32]] and [[J2M2|J2M2 mod.11]] were finished and the navy once again tasked Mitsubishi and Horikoshi's team to design a new zero successor dubbed this time as the ''17-shi Ko''. The Navy requirements for the 17-shi were as followed: | ||
| Line 24: | Line 24: | ||
'''Maneuverability''' ≥ A6M3 | '''Maneuverability''' ≥ A6M3 | ||
| − | As before, one of the main hurdles was engine selection. To meet the specifications the engine would need to produce at least 2,000 hp (1,500 kW), which narrowed choices down to Nakajima's NK9 "Homare" (Ha-45) | + | As before, one of the main hurdles was engine selection. To meet the specifications, the engine would need to produce at least 2,000 hp (1,500 kW), which narrowed choices down to Nakajima's NK9 "Homare" (Ha-45) or Mitsubishi's MK9 (Ha-43); both engines still being under development. These engines were based on 14-cylinder (Nakajima NK1 "Sakae" (Ha-25) and Mitsubishi MK8 "Kinsei" (Ha-33), respectively) engines converted to 18-cylinder powerplants. The early NK9 had less output but was already approved by the Navy for use on the [[P1Y1 mod. 11|Yokosuka P1Y Ginga]], while the larger MK9 promised more horsepower. |
| − | With the larger, more powerful engine compared to the A6M's, wing loading became an issue. The Navy requested at most 150 kg/m² | + | With the larger, more powerful engine compared to the A6M's, wing loading became an issue. The Navy requested at most 150 kg/m² but wanted 130 kg/m², which complicated design considerations further. With the NK9 it could achieve 150 kg/m2, but with less power, it would not meet the specifications for maximum speed. With the MK9's 2,200 hp (1,600 kW), the engineers concluded it could fulfil the requirements; however, production of the MK9 was delayed compared to the NK9, and the Japanese Navy instructed Mitsubishi to use the NK9's 2,000 hp (1,500 kW). |
| − | Work on the 17-Shi was further delayed by factories prioritizing [[A6M (Family)|A6M]] and [[G4M1|G4M]] production as well as further work on [[A6M (Family)|A6M]] variants and addressing [[J2M (Family)|J2M]] issues. As a result, the 17-Shi, which became the [[A7M1 (NK9H)|A7M1]], officially flew for the first time on 6 May 1944, four years after development started. The aircraft demonstrated excellent handling and | + | Work on the 17-Shi was further delayed by factories prioritizing [[A6M (Family)|A6M]] and [[G4M1|G4M]] production as well as further work on [[A6M (Family)|A6M]] variants and addressing [[J2M (Family)|J2M]] issues. As a result, the 17-Shi, which became the [[A7M1 (NK9H)|A7M1]], officially flew for the first time on 6 May 1944, four years after development started. The aircraft demonstrated excellent handling and manoeuvrability but was underpowered as Mitsubishi engineers feared and with a top speed similar to the [[A6M5|A6M5 mod.52]]. It was a disappointment, and the Navy ordered development to stop on 30 July 1944. |
| − | But previously Mitsubishi obtained permission for development to continue using the Ha-43 engine, Saburo Sakai test-flighted with Ha-43 on 13 October 1944 and after the flight test, Sakai was extremely impressed with the [[A7M2]]. The [[A7M2]] now achieved a top speed of {{Annotation|339 kn|628 km/h; 390 mph}} | + | But previously, Mitsubishi obtained permission for development to continue using the Ha-43 engine, Saburo Sakai test-flighted with Ha-43 on 13 October 1944 and after the flight test, Sakai was extremely impressed with the [[A7M2]]. The [[A7M2]] now achieved a top speed of {{Annotation|339 kn|628 km/h; 390 mph}} while climb and other areas of performance surpassed the Zero, leading the Navy to change its mind and adopt the ordered cancel. The [[A7M2]] was also equipped with automatic combat flaps, used earlier on the Kawanishi [[N1K (Family)|N1K-J]], significantly improving manoeuvrability. |
===Planned variants=== | ===Planned variants=== | ||
| Line 43: | Line 43: | ||
Proposed land-based interceptor version powered by a 2,200 hp (1,600 kW) turbo-supercharged Mitsubishi Ha-43 engine including an inter-cooler, with a maximum speed of {{Annotation|648 km/h|402 mph}}. The armament consisted of six [[Type_5_(30_mm)|30 mm Type 5]] cannons, four wing-mounted & two oblique fuselage-mounted. | Proposed land-based interceptor version powered by a 2,200 hp (1,600 kW) turbo-supercharged Mitsubishi Ha-43 engine including an inter-cooler, with a maximum speed of {{Annotation|648 km/h|402 mph}}. The armament consisted of six [[Type_5_(30_mm)|30 mm Type 5]] cannons, four wing-mounted & two oblique fuselage-mounted. | ||
===Usage=== | ===Usage=== | ||
| − | In late 1944 an earthquake strained the manufacturing of the A7M2 causing only 8 to be built. In early 1945, Allied bombings of Japans mainland lead to the destruction of the A7M plans. This ceased the development of the A7M2 and the plane would never see combat. Only a single A7M2 would be built in 1945 due to allied bombings. | + | In late 1944 an earthquake strained the manufacturing of the A7M2 causing only 8 to be built. In early 1945, Allied bombings of Japans mainland lead to the destruction of the A7M plans. This ceased the development of the A7M2, and the plane would never see combat. Only a single A7M2 would be built in 1945 due to allied bombings. |
| − | 10 | + | 10 A7Ms were built (including prototypes), with none surviving the war. |
| − | + | == Media == | |
| − | ==Media==--> | + | <!-- ''Excellent additions to the article would be video guides, screenshots from the game, and photos.'' --> |
| + | ;Videos | ||
| + | {{Youtube-gallery|JynFzP5cOdk|'''The Shooting Range #391''' - ''Pages of History'' section at 02:57 discusses the A7M.}} | ||
{{AirManufacturer Mitsubishi}} | {{AirManufacturer Mitsubishi}} | ||
Latest revision as of 16:16, 31 March 2024
Contents
Description
The Mitsubishi A7M, designated as Reppū (烈風), was a series of Japanese fighter aircraft designed and built by Mitsubishi Heavy Industries during World War II. The A7M was intended to replace the A6M as the Imperial Japanese Navy's main carrier-based fighter. The A7M had a more powerful engine, a larger wing, and improved manoeuvrability and speed than the Zero. However, the A7M faced many technical difficulties and delays, and only a few prototypes were completed before the end of the war.
Nicknames being:
- ▅ - Reppū (烈風, Strong Wind)
- ▃ - Sam
Vehicles
Rank IV
- A7M1 (NK9H) - Reppū Prototype 2
- A7M2 - Reppū Model 11
History
Very soon after the A6M2 mod.11 started entering the production phase in end-1940 the Japanese Navy already requested Mitsubishi to design a direct successor of the A6M, which would be dubbed as the 16-shi. But at the time, there was no viable high-output as calculations by Jiro Horikoshi's development team who designed the A6M, suggested that to have a climb rate and top speed needed by the Navy they would have to use a minimum of 2,000hp engine. This proved to be an exceptional challenge as the two engines which theoretically could develop this power were still under development. Besides that, Horikoshi's team were still occupied with engineering the A6M2 mod.21 and designing the 14-shi interceptor (which would later be known in service as the J2M), for these reasons Mitsubishi put the plans for a Zero-successor on hold in January of 1941.
Development
In April of 1942, development of the A6M3 mod.32 and J2M2 mod.11 were finished and the navy once again tasked Mitsubishi and Horikoshi's team to design a new zero successor dubbed this time as the 17-shi Ko. The Navy requirements for the 17-shi were as followed:
Speed ≥ 345 kn above 6,000 m Climb rate ≥ 6,000 m in less than 6 minutes Armament = 2 x 20 mm and 2 x 13 mm Maneuverability ≥ A6M3
As before, one of the main hurdles was engine selection. To meet the specifications, the engine would need to produce at least 2,000 hp (1,500 kW), which narrowed choices down to Nakajima's NK9 "Homare" (Ha-45) or Mitsubishi's MK9 (Ha-43); both engines still being under development. These engines were based on 14-cylinder (Nakajima NK1 "Sakae" (Ha-25) and Mitsubishi MK8 "Kinsei" (Ha-33), respectively) engines converted to 18-cylinder powerplants. The early NK9 had less output but was already approved by the Navy for use on the Yokosuka P1Y Ginga, while the larger MK9 promised more horsepower.
With the larger, more powerful engine compared to the A6M's, wing loading became an issue. The Navy requested at most 150 kg/m² but wanted 130 kg/m², which complicated design considerations further. With the NK9 it could achieve 150 kg/m2, but with less power, it would not meet the specifications for maximum speed. With the MK9's 2,200 hp (1,600 kW), the engineers concluded it could fulfil the requirements; however, production of the MK9 was delayed compared to the NK9, and the Japanese Navy instructed Mitsubishi to use the NK9's 2,000 hp (1,500 kW).
Work on the 17-Shi was further delayed by factories prioritizing A6M and G4M production as well as further work on A6M variants and addressing J2M issues. As a result, the 17-Shi, which became the A7M1, officially flew for the first time on 6 May 1944, four years after development started. The aircraft demonstrated excellent handling and manoeuvrability but was underpowered as Mitsubishi engineers feared and with a top speed similar to the A6M5 mod.52. It was a disappointment, and the Navy ordered development to stop on 30 July 1944.
But previously, Mitsubishi obtained permission for development to continue using the Ha-43 engine, Saburo Sakai test-flighted with Ha-43 on 13 October 1944 and after the flight test, Sakai was extremely impressed with the A7M2. The A7M2 now achieved a top speed of 339 kn while climb and other areas of performance surpassed the Zero, leading the Navy to change its mind and adopt the ordered cancel. The A7M2 was also equipped with automatic combat flaps, used earlier on the Kawanishi N1K-J, significantly improving manoeuvrability.
Planned variants
Next to the prototype A7M1 and production ready A7M2 there were 2 direct variants of the A7M:
- A7M3
Proposed land-based fighter version was powered by a 2,250 hp (1,680 kW) mechanically driven three-speed supercharged Mitsubishi Ha-43 with a maximum speed of 642 km/h. Armament consistent of six 20 mm Type 99 Model 2 in the wings.
- A7M3-J
Proposed land-based interceptor version powered by a 2,200 hp (1,600 kW) turbo-supercharged Mitsubishi Ha-43 engine including an inter-cooler, with a maximum speed of 648 km/h. The armament consisted of six 30 mm Type 5 cannons, four wing-mounted & two oblique fuselage-mounted.
Usage
In late 1944 an earthquake strained the manufacturing of the A7M2 causing only 8 to be built. In early 1945, Allied bombings of Japans mainland lead to the destruction of the A7M plans. This ceased the development of the A7M2, and the plane would never see combat. Only a single A7M2 would be built in 1945 due to allied bombings.
10 A7Ms were built (including prototypes), with none surviving the war.
Media
- Videos
| Mitsubishi Company (三菱商会) | |
|---|---|
| Fighters | A5M4 · Hagiri's A5M4 |
| A6M2 mod. 11 · A6M2 · A6M3 · A6M3 mod. 22 · A6M3 mod. 22Ko · A6M5 · A6M5 Ko · A6M5 otsu · A6M5 Hei · A6M6c | |
| A7M1 (NK9H) · A7M2 | |
| J2M2 · J2M3 · J2M4 Kai · J2M5 · J2M5 (30 mm) | |
| Hydroplanes | F1M2 |
| Interceptors | Ki-83 · Ki-109 |
| Bombers | G4M1 |
| Ki-21-Ia · Ki-21-I hei · Ki-67-I Ko · Ki-67-I otsu | |
| Jet Fighters | Ki-200 |
| Captured | ▃A6M2 · ␗A6M2 |
| See also | Mitsubishi Heavy Industries, Ltd. (Post-War) |
| Japan fighters | |
|---|---|
| Navy | |
| Carrier-based fighter | |
| A5M | A5M4 · Hagiri's A5M4 |
| A6M | A6M2 mod. 11 · A6M2 · A6M3 · A6M3 mod. 22 · A6M3 mod. 22Ko · A6M5 · A6M5 Ko · A6M5 otsu · A6M5 Hei · A6M6c |
| A7He | A7He1* |
| A7M | A7M1 (NK9H) · A7M2 |
| Land-based Fighter | |
| J2M | J2M2 · J2M3 · J2M4 Kai · J2M5 · J2M5 (30 mm) |
| J6K | J6K1 |
| J7W | J7W1 |
| N1K-J | N1K1-Ja · N1K2-J · N1K2-Ja |
| Fighter seaplane | |
| N1K | N1K1 |
| A6M-N | A6M2-N |
| Army | |
| Ki-10 | Ki-10-I · Ki-10-I C · Ki-10-II · Ki-10-II C |
| Ki-27 | Ki-27 otsu · Ki-27 otsu Tachiarai |
| Ki-43 | Ki-43-I · Ki-43-II · Ki-43-III otsu |
| Ki-44 | Ki-44-I · Ki-44-I 34 · Ki-44-II otsu · Ki-44-II hei |
| Ki-61 | Ki-61-I ko · Ki-61-I otsu · Ki-61-I hei · Tada's Ki-61-I hei · Ki-61-I tei · Ki-61-II Otsu Kai |
| Ki-84 | Ki-84 ko · Ki-84 otsu · Ki-84 hei |
| Ki-87 | Ki-87 |
| Ki-94 | Ki-94-II |
| Ki-100 | Ki-100 · Ki-100-II |
| Other countries | ▅F4U-1A · ▅P-51C-11-NT · ▅Bf 109 E-7 · ▅Fw 190 A-5 |
| *Imported designation of the He 112 (A6M was in development - A7M would take A7 designation after the cancelation of the A7He) | |
