JuanG -> RE: Japanese 40MM? (11/15/2012 11:36:13 PM)
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Not even going to attempt to answer the majority of that, just the technical bits. quote:
ORIGINAL: btbw I see many people trust in myth of low ROF or slow track of 25mm AA gun. Well winners always right. But in really this not real problem of that gun. Feeding? Almost all guns compared by caliber feeded like 25mm gun. 25mm Type 96 - 15 round magazine per gun, meaning 3.75 seconds of fire (240rpm cyclic). Could not be loaded/fed until the whole magazine was exhausted. 1.1in Mark 1 - Two 8 round clips per gun, meaning 6.4 seconds of fire (150rpm cyclic). Fed from one clip at a time, so sustained fire was possible by staggering fire and good loading. 2pdr Mk VIII - 14 round belts; feed box could hold 4, 8 and 10 belts per gun for the single, quad and octuple respectively. This is 84 seconds of fire for the octuple (100rpm cyclic) and more for the smaller mounts. Could not be loaded/fed until the whole feed box was exhausted, and was the hardest of the weapons here to load. 20mm Oerlikon - 60 round spiral magazine, meaning 8 seconds of fire (450rpm cyclic). Could not be loaded/fed until magazine was exhausted, though there was a proposed belt fed version. Reloading was fast. 40mm Bofors - Two 4 round clips per gun, meaning 4 seconds of fire (120rpm cyclic). Could be easily fed while firing, allowing for uninterrupted fire for the duration of an engagement (unless the ammo team messed up). FEEDING MECHANISM LOSER? 25mm Type 96, by a long shot. quote:
ORIGINAL: btbw Tracking? Same ****. 25mm Type 96 - Triple; Elevation 12 degrees per second when powered, less when manual (which most were). Train 18 degrees per second when powered, notably less when manual. 1.1in Mark 1 - Elevation 24 degrees per second, Train 30 degrees per second. 2pdr Mk VIII - MkVII manually operated quad Elevation 15 degrees per second, Train 15 degrees per second. Powered mounts, Elevation 25 degrees per second, Train 25 degrees per second. 20mm Oerlikon - Manual only. Train and elevation rates rather high due to relatively lightweight single mounting. Twin mounts were notably less mobile. 40mm Bofors - Twin and Quad; Elevation 24 degrees per second, Train 26 degrees per second. TRAIN/ELEVATION GEAR LOSER? 25mm Type 96, even when in its powered version. Twin 20mm and manual 2pdr were only slightly better, but everything else leaves this thing in the dust. Was it also the weakest of the lot? Yes, both in terms of muzzle kinetic energy and actual explosive load. But even if it had packed the power of a 40mm behind it, the weapon is useless if you aren't going to hit anything with it or can't sustain fire. This last bit is really important when hitting flying targets with an impact fuzed automatic weapon, especially in the absence of radar assistance.
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