>>New version here<<

Wiki

In 1937, the Imperial Japanese Navy's Koku Hombu (Aviation Bureau) issued the "Planning Requirements for the Prototype 12-shi Carrier Fighter" to the Mitsubishi Kokuki K.K. (Mitsubishi Aircraft Company Ltd.) and the Nakajima Hikooki K.K. (Nakajima Aeroplane Company Ltd.), requiring designs for a new fighter to replace the Mitsubishi Type 96 Carrier Fighter (A5M). The requirements were extremely challenging: manoeuvrability equal to or better than the Type 96 fighter, heavier armament including 20 mm cannons, exceptional rate-of-climb to intercept bombers, a range of at least 1,010 miles with a normal fuel load to escort bombers, a take-off distance of less than 230 ft into a 30 mph wind, landing speed of less than 67 mph, and a top speed better than 310 mph.

Nakajima soon bowed out in the face of such seemingly impossible requirements, but Jiro Horikoshi, who had previously designed the A5M, and his design team at Mitsubishi were undeterred. In addition to the already demanding requirements of the IJN, Horikoshi was also limited by the relatively weak engines that the Japanese aviation industry had to offer at the time. Selecting the lighter but less powerful Mitsubishi Zuisei-13 ("Holy Star"), which had a rating of less than 900 hp, the Mitsubishi team strove to design the lightest possible airframe around the engine, but that was still strong enough to withstand carrier operations and carry enough fuel and weapons to be an effective fighter. To this end, they were fortunate that the Sumitomo Metal Company had just finished developing a new strong zinc-aluminium alloy known as Extra Super Duralumin (ESD), allowing thinner sheets to be used for the skin of the fighter without loss of strength. However, they also had to dispense with self-sealing fuel tanks and any sort of armour for the pilot. The relatively light but less powerful Oerlikon FF 20 mm cannon was chosen as the fighter's main armament, produced in Japan as the 20 mm Type 99. A large wing ensured a low wing loading to ensure maneuverability but limited the diving and level speeds.

The first flight of the Prototype 12-shi carrier fighter (later designated A6M1) took place on 1 April 1939. The next month, the IJNAF expressed its intentions to switch from the Zuisei-13 to the more powerful Nakajima Sakae-12 ("Prosperity") 14-cylinder radial engine, and it was first installed on the third prototype. This prototype would be designated as the A6M2, and it was with the Sakae radial engine that almost every model of the A6M fighter family would go to war. Testing of the first three A6M prototypes took place later that year. The A6M1 was able to meet all but the maximum speed requirements, but the Sakae-equipped A6M2 exceeded them at 331 mph. On 31 July 1940, the Mitsubishi A6M2 was formally accepted by the IJNAF as the Type 0 Carrier Fighter Model 11.

The A6M2 proved itself during combat in China. The aircraft also performed well during its carrier trials. One problem that did quickly arise was its ability to fit on carrier's elevators. The solution was to have the A6M2 fold its wing tips to avoid damage. This reduced the total wingspan by 20 inches. This change required it to have a new designation. The aircraft was put into production in November of 1941 and a total of 740 were constructed. This particular variant was code-named "Zeke 21" by Allies.

A6M2

This single-seater carrier-based fighter was designed to replace the aging A5M. To reduce its weight, duralumin was widely used, and its propeller was made of a lightweight aluminum alloy. The A6M2 did not have high survivability due to its lack of armor and self-sealing fuel tanks, but in the first half of World War II, it had a considerable advantage in maneuverability and speed when compared to the Allies (which had nothing to oppose the Zero until the arrival of aircraft such as the F4U and F6F).

The first prototype of this series, the A6M1, first flew on April 1, 1939. During the test, a more powerful engine was proposed, and the Mitsubishi Zuisei 13 (780 hp) was replaced with the Nakajima Sakae 12 (940 hp). After a successful test flight, the new engine was adopted for serial production and the plane was designated the A6M2 Model 11. Its main drawback was that it could not be used on aircraft carriers due to its large wingspan, which was not designed for carrier-based operations. To circumvent this limitation, the A6M2 model 21 was designed with folding 500 mm wing panels.

The Zero had no equal in the sky until the end of 1942, and even when it was finally made obsolete, its production continued until the end of the war, making it the most popular fighter in Japan. Like many other Japanese aircraft, the Zero was used in the last months of the war to attack bombers.

A total of 740 A6M2 model 21s were built in Mitsubishi plants; 326 were built in Nakajima plants.

General Characteristic

Role:

Naval carrierborne fighter

Crew:

1

Powerplant:

Nakajima Sakae 12

Weapons:

2 x 20 mm Type 99 Model 1 cannon with the ammunition of 120 rounds

Controls

Roll: Roll

Pitch: Pitch

Yaw: Yaw

Landing Gear: Gear

Flaps: VTOL

Arrestor gear: AG2

Folding wing tip: AG3