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Concept
7.5 cm Pak 97/38
Summary
The Pak 97/38 (7.5 cm Panzerabwehrkanone 97/38 and 7,5 cm Panzerjägerkanone 97/38) was a German anti-tank gun used by the Wehrmacht in World War II. The gun was a combination of the barrel from the French Canon de 75 modèle 1897 fitted with a Swiss Solothurn muzzle brake and mounted on the carriage of the German 5 cm Pak 38 and could fire captured French and Polish ammunition.
Together with light weight, good mobility and sufficient anti-armor performance with a HEAT shell (enough to penetrate T-34s in most situations; the side armor of the KV series could also be pierced), it made the gun a decent anti-tank weapon. It had shortcomings, particularly its low muzzle velocity. Although this did not affect the armor-piercing characteristics of its HEAT ammunition, it meant insufficient performance when firing regular AP shells and - because of difficulties in hitting small mobile targets - its low effective range of about 500 m even with HEAT. The gun also had a quite violent recoil, especially with AP shells.
During the invasion of Poland and invasion of France the Wehrmacht captured thousands of 75 mm Model 1897 guns, built by the French arms manufacturer Schneider. These guns were adopted by the Germans as the FK 97(p)(7,5) and the 7.5 cm FK 231(f) and used in their original field artillery role.
Soon after the German invasion of the USSR in 1941, Wehrmacht units encountered new Soviet tanks, the medium T-34 and the heavy KV. The thick and/or sloped armor of these vehicles gave them invulnerability against German towed 3.7 cm Pak 36 anti-tank guns. The situation led to requests for more powerful weapons that would be able to destroy them at normal combat ranges. Since Germany already had a suitable design, the 7.5 cm Pak 40, this weapon entered production and the first pieces were delivered in November 1941. However, until enough of these were manufactured, some expedient solution was required.
It was tempting to adopt the readily available French gun to the anti-tank role.
Official source
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