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3-50 [2011/01/02 23:14]
historian
3-50 [2011/01/02 23:15]
historian
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 ====== Twin 3"/50 Anti-Aircraft Gun ====== ====== Twin 3"/50 Anti-Aircraft Gun ======
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 ###In 1944-1945, the USN found that their 20 mm Oerlikons and 40 mm Bofors batteries were ineffective in stopping Japanese Kamikaze attacks. Only the 5"/38 (12.7 cm) fired a round large enough to destroy a determined attacker and this weapon was too heavy to use in the numbers necessary. This problem led to an accelerated program to develop an intermediate-caliber weapon that could fire a VT fuzed shell. ###In 1944-1945, the USN found that their 20 mm Oerlikons and 40 mm Bofors batteries were ineffective in stopping Japanese Kamikaze attacks. Only the 5"/38 (12.7 cm) fired a round large enough to destroy a determined attacker and this weapon was too heavy to use in the numbers necessary. This problem led to an accelerated program to develop an intermediate-caliber weapon that could fire a VT fuzed shell.
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-<box 310px left round blue|> ​ {{:​3-50gun.jpg?​280x385|}} ​ </​box>​ 
  
 The weapon chosen was the standard 3"/50 (7.62 cm) Mark 22 used on many Destroyer Escorts and auxiliaries built during the latter part of World War II. This was the smallest-caliber weapon which could still use the VT fuzes available at the time. It also had a concentric counter-recoil spring, which meant that it was more easily adapted for automatic fire, which was achieved with an electrically driven auto-loader using revolving sprockets. BuOrd rushed this through the design phase, with the first prototype being ready for test firing on 1 September 1945. The weapon chosen was the standard 3"/50 (7.62 cm) Mark 22 used on many Destroyer Escorts and auxiliaries built during the latter part of World War II. This was the smallest-caliber weapon which could still use the VT fuzes available at the time. It also had a concentric counter-recoil spring, which meant that it was more easily adapted for automatic fire, which was achieved with an electrically driven auto-loader using revolving sprockets. BuOrd rushed this through the design phase, with the first prototype being ready for test firing on 1 September 1945.