Name: | Autocannon Type 99-2 Model 3 | Autocannon Type 99 Mark 2 Model 3 | ||
Original Title: | Original Name: | 九九式二〇粍二号機銃三型 | ||
Manufacturer: | Dai Nihon Heiki K. K., Toykawa Naval Arsenal | |||
Period of production: Production Period: | DD.MM.1942-DD.08.1945 | |||
Units produced: Number of Produced: | ? | |||
Prototype Produced: Prototype Built: | DD.MM.1942 | |||
Usage: Use: | some Mitsubishi A6M3 22 Reisen, Mitsubishi J2M Raiden, Kawanishi N1K Shiden, Nakajima J1N1-Sa Gekko | |||
Specifications: | Technical Data: | |||
Weight: Weight: | 37.0 kg | 82 lb | ||
Calibre: Calibre: | 20 mm / 0.79 in | |||
Hub: Cartridge: | 20x101RB | |||
Barrel Length: Barrel Length: | 1054mm | 3ft 5.5in | ||
Overall Length: | Overall Length: | 1885mm | 4ft 4.39in | |
Ammunition Used: Ammo Used: | Bullet, Penetrating (142g), Penetrating-Incendiary, Bursting-Incendiary, Bursting-Incendiary, Bursting-Incendiary with tracer, Bursting-Incendiary and Incendiary | Ball, A.P. (5.009oz), A.P./I., T., H.E., H.E./T., H.E./I. I | ||
Performance: Performance: | ||||
Maximum Range: Maximum Range: | 0.8 - 1 km | 0.5 - 0.6 mi | ||
Rate of Fire: Rate of Fire: | 490 rpm | Rate of Attack: Muzzle Velocity: | 750 m/s | 1968.5 ft/s |
Note: Note: | 九式二号機銃 - Kyū-Kyū Shiki Nigō Kizyū, Kanji This weapon was produced in parallel with the Type 99-1, and was produced in a fixed stock design. This type used a different type of cartridge, and differed from the Type 99-1 by its long barrel. The weapon had a higher power output due to the higher muzzle velocity, and quite reciprocally, this weapon had a higher recoil. This model carried its ammunition supply in a drum magazine which held 100 grenades. It was an improved copy of the Swiss Oerlikon FFL, and was introduced in the Japanese naval aviation for its higher performance. | 九式二号機銃 - Kyū-Kyū Shiki Nigō Kizyū, Kanji The Type 99 Mark 2 was a heavier weapon with a stronger recoil, and was not put in use by the Imperial Japanese Navy before 1942. It was used exclusively in fixed installations in fighters. The Type 99 Mark 2 Model 3 was equipped with a 100-round drum, but the size of the drum was itself a problem in installations in wings of fighters. The Model 2 was based on the Oerlikon FFL and came into use as airframes became large and strong enough to accommodate the bigger, more powerful gun. | ||
Sources: | René J. Francillon Ph.D., Japanese Aircraft of the Pacific War, Naval Institute Press, Annapolis Maryland, Reprinted 1990, ISBN-0-87021-313-X www.lonesentry.com users.telenet.be www.japaneseammunition.com www.warbirdsresourcegroup.org pwencycl.kgbudge.com http://ww2db.com/weapon.php?q=188 |