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The Pak 43 (''Panzerabwehrkanone 43'') was a German 88 mm anti-tank gun developed by Krupp in competition with the Rheinmetall 8.8 cm Flak 41 anti-aircraft gun and used during the Second World War. The Pak 43 was the most powerful anti-tank gun of the Wehrmacht to see service in significant numbers, also serving in modified form as the 8.8 cm KwK 43 main gun on the Tiger II tank, and Elefant, Jagdpanther and Nashorn tank destroyers. The improved 8.8 cm gun had a very flat trajectory out to , making it easier for the gunner to hit targets at longer ranges as less corrections in elevation were needed. In addition to this the gun's exceptional penetration performance made it able to frontally penetrate any Allied tank to see service during the war at long ranges, even the Soviet IS-2 tanks and IS chassis-based tank destroyers. The gun's maximum firing range exceeded 13 kilometers (8 miles). ==Design== KwK 43 and Pak 43's were initially manufactured with monobloc barrels. However, the weapons' extremely high muzzle velocity and operating pressures caused accelerated barrel wear, resulting in a change to a two-piece barrel. This had no effect on performance but made replacing a worn out barrel much faster and easier than before. The massively increased operating pressures of the new gun in turn required a new armour piercing shell to be designed. The result was the PzGr.39/43 APCBC-HE projectile, which apart from the addition of much wider driving bands was otherwise identical to the older 10.2 kilogram PzGr.39-1 APCBC-HE projectile used by the 8.8 cm KwK 36 and Pak 43 guns. The wider driving bands resulted in a increased weight of 10.4 kilograms for the PzGr.39/43.〔US Army Technical Manual TM9-1985-3, United States Government Printing Office Washington, 1953〕 However, up until the full transition to the new PzGr.39/43 round was complete, the older PzGr.39-1 was used for the KwK & Pak 43, but only provided the gun had been used for no more than 500 rounds. Over this, the expected barrel wear combined with the narrow driving bands could lead to a loss of pressure. The new PzGr.39/43 could be fired without loss of pressure until the barrel was worn out, thus requiring no restriction. PzGr.39-1 FES & Al all up weight: 10.2 kg (9.87 kg without fuse & bursting charge) PzGr.39/43 FES & Al all up weight: 10.4 kg (10.06 kg without fuse & bursting charge) The same 278 gram BdZ 5127 fuse and 59 gram Amatol bursting charge was used for both types of projectile (PzGr.39-1 & PzGr.39/43), requiring armoured targets of 30mm or thicker to ignite after penetration for maximum behind armour effects. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「8.8 cm Pak 43」の詳細全文を読む スポンサード リンク
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