Type 99 cannon

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Type 99 cannon
Type 99 cannon

The Type 99 cannon was adaptated from the Oerlikon FF by the Imperial Japanese Navy and served as their standard aircraft autocannon during World War II.

Type 99 had three models according to loading methods, but two models Type 99 Model 1 (Japanese: Kyū-Kyū Shiki Itigō Kizyū, Kanji: 九九式一号機銃) and Type 99 Model 2 (Japanese: Kyū-Kyū Shiki Nigō Kizyū, Kanji: 九九式二号機銃) by Imperial Japanese Navy designation. The change in model to lead to a weight increase that is problematic for fighters, but the navy was concerned about the limited ammunition capacity and 60 round drum magazines became 100 round magazines, and were eventually replaced with 125 rounds of belt-feed ammo.

Contents

[edit] Installations

[edit] Specifications (Model 1)

  • Caliber: 20 mm
  • Ammunition: 20 x 72
  • Length: 133 cm (53 in)
  • Weight: 23 kg (51 lb)
  • Rate of fire: 490 rounds/min
  • Muzzle velocity: 760 m/s (2,490 ft/s)

[edit] External links

[edit] 20mm Gun Table

Name Cartridge Projectile
weight		 Rate of fire Muzzle
velocity		 Gun
weight
(grams) (rpm) (m/s) (kg)
France
HS.9 20 x 110RB 122 360-420 830 48
HS.404 20 x 110 130 700 880 60
Germany
MG FF 20 x 80RB 134 520 600 28
MG FF/M 20 x 80RB 92/115 540/520 700/585 28
MG 151/20 20 x 82 92/115 750 - 800 800/720 42
Japanese Army
Type 94 Flexible 20 x 99RB 127 380 675 43
Ho-1 20 x 125 144 400 805 45
Ho-3 20 x 125 144 400 805 45
Ho-5 20 x 94 96 750 - 850 715 37
Japanese Navy
Type 99-1 20 x 72RB 129 490 760 23
Type 99-2 20 x 101RB 128 490 750 34
Great Britain
Hispano Mk.II 20 x 110 130 600 880 50
Hispano Mk.V 20 x 110 130 750 840 42
USSR
ShVAK 20 x 99R 95 800 750 - 770 42
Berezin B-20 20 x 99R 95 800 750 - 770 25
Vya 23 x 152B 200 550 880 69
NS-23 23 x 115 200 550 690 37


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