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PaK 40 (PanzerAbwehrKanone 40)


Towed Anti-Tank (AT) Gun [ 1941 ]



For the seoncd half of the war, the PaK 40 was the most-deployed anti-tank gun of the German Army.



Authored By: Staff Writer | Last Edited: 10/09/2016 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

VIEW SPECIFICATIONS [+]
By 1939, the German Army had already matched current battlefield conditions with their design and development of the PaK 38 50mm (5cm / 1.97in) anti-tank gun. However, even before this new 50mm system was to reach frontline troops, German authorities were already decided on a new, more powerful antitank gun to counter the expected increases in tank armor. While the requirement for such a weapon was initially low, the German invasion of the Soviet Union - and the subsequent appearance of the heavily armored T-34 medium and KV-1 and KV-2 heavy tanks - forced the gun to become a top priority within the German ranks.

The German firm of Rheinmetall-Borsig AG was selected to produced the next incarnation of the PaK anti-tank gun and essentially took the existing PaK 38 design and "upsized" it to become the potent PaK 40 fitting the 75mm L/46 (7.5cm / 2.95in) caliber main armament. The PaK 40 was formally adopted into German Army service in 1940 though production deliveries were slow to develop - examples appearing out of factories only late that year (in November) and at a rate of just 15 units per month. As such, she was not introduced into quantitative service until February of 1942 to which the German Army was now fully embroiled in war with the Soviets along the East Front and in ongoing campaigns elsewhere across Europe and North Africa - trying to maintain multiple fronts with a steady supply of manpower, machines and critical resources. The PaK 40 would go on to prove her worth, however, for in the second half of World War 2, the PaK 40 became the most deployed German anti-tank cannon and a standard in the Wehrmacht inventory.

While outwardly similar to the PaK 38 before it, the PaK 40 was larger in dimension and heavier in weight, thusly making her less mobile than her predecessor - the price to be had for a gun system capable of dealing with next generation armor. Traveling weight was listed at 3,307lbs while her "action" weight was in the vicinity of 3,141lbs - the former requiring the use of vehicles to tow the system over long distances and the latter requiring the weapon to be physically handled into place by the gunnery crew.

The PaK 40 retained the PaK 38's general layout with the gun mount seated on a two-wheeled, rubber-tired carriage system with split trail ends doubling as both her recoil legs (when split open) and as the carriage tow arm (when brought together). The barrel was long, extending out over a single-piece, three-panel blast shield and fitted with a multi-baffled muzzle brake at its business end. The barrel was loaded from its breech (semi-automatic, horizontal sliding block) at the rear of the gun, the crew only slightly protected from battlefield dangers by the forward shield element - essentially, the gunnery crew would have to crouch down behind their blast shield. Defense was only through any personal weapons carried by the crew which meant that PaK 40 positions could be overrun by enemy infantry. The firing action of the PaK 40 could be managed by a single soldier in a pinch though more hands ultimately led to a more efficient weapon - a basic gunnery crew consisted of five personnel. A trained, experienced crew could let off 14 rounds per minute.

The shortage of raw materials was beginning to play a critical role in the upcoming actions of the German military so special attention in regards to the construction of the PaK 40 was paid. Therefore, various steel types were used and portions were fabricated from large single pieces when possible. To her benefit, the PaK 40 did maintain a low profile which allowed her to be concealed and lie in wait amongst brush, sunken earth or holed out structures. The main gun could manage an elevation range of +22 to -5 degrees with a traverse of 45-degrees. The latter value forced the gunnery crew to apply positional reassessments themselves and physically lift the carriage legs and rotate the weapon on its wheels to provide for a new engagement angle.©MilitaryFactory.com
The operating crew was given access to a small range of 75x714mm.R (75mm) ammunition options for the specific action at hand. This included the standard 15lb AP (Armored-Piercing) round as well as the 9lb AP40 which featured a tungsten-based core, ultimately proving a rarity as the war progressed. Even out to 2,190 yards, the AP40 (also known as "APCR" = "Armor-Piercing, Composite Rigid") projectile could pierce some 98mm of armor and, as can be imagined, this penetration value (up to 154mm) was only heightened at closer ranges making the PaK 40 one of the more feared - and respected - of the German guns. Of course there was also the standard issue 12.6lb HE (High-Explosive) rounds to deal with infantry and structures. Muzzle velocity of the AP, AP40 and HE projectiles were listed as 2,650 ft/s, 3,300 ft/s and 1,850 ft/s respectively. Effective range of the AP round was out to 8,350 feet while the HE round was rated effective out to 25,350 feet. PaK 40 projectiles were the same standardized rounds utilized by the long-barreled KwK 40 series tank guns fielded by Panzers, being differentiated only by their cartridge cases.

From the outset, the PaK 40 proved an excellent anti-tank weapon system - however, her excellence ultimately relied on the professionalism and training of her firing crew as any weapon was only good as the man behind it. At any rate, the PaK 40 was more than capable of penetrating the armor facings of any Allied tank at the time of her inception. However, if there was a key drawback in her design it was in her weight - her wheels regularly battling the high mud of the terrible Russian winter and forcing the use of artillery tractors to transport her about. In the German retreat of 1943, many PaK 40s were simply deserted along roads and passes by their German Army owners due to their immobility and getting stuck in mud and snow. Combat also brought the PaK 40 to battles in Italy and across the Mediterranean region.

The PaK 40 would see production through to the end of the war, remaining largely unchanged from her original form - such was her excellent design and general battlefield usefulness, plus Germany was fighting an all-out defensive war by the end. In all, over 23,000 PaK 40 guns were produced out of German-held factories with 11,728 of these produced in 1944 alone. The PaK 40 was in action until the final days of the war, still deemed capable of "addressing" most enemy tanks as needed.

The PaK 40 formed the basis of a few other notable developments including a dedicated tank-based main gun and a lighter version specifically designed for use on ground-attack aircraft. The split trail carriage was also the mount for an improvised infantry gun mounting a short-barrel 75mm gun. The PaK 40 was utilized as a field gun under the designation of 7.5cm FK 40 "Feldkanone". The PaK 40 became the primary armament on tracked vehicles to form stopgap "Marder" tank destroyers and fitted to 8x8 armored reconnaissance cars and halftrack carriers for infantry fire support duties and stand-off tank destroyers. Some 6,000 PaK 40 series guns were fitted to vehicles in these manners.

The PaK 40 was utilized beyond the German Army during World War 2, with operators including allies (some by force) such as Albania, Bulgaria, Czechoslovakia, Finland, Norway, Hungary and Romania. The Soviet Army even utilized captured PaK 40s (a common practice by both sides) against their former owners, in a way informally paying "respect" to the German design. Norway retained a stock of PaK 40s in their army inventory for a time during the post-war years.

Incidentally, the acronym of "PaK" stands for "PanzerAbwehrKanone".©MilitaryFactory.com
Note: The above text is EXCLUSIVE to the site www.MilitaryFactory.com. It is the product of many hours of research and work made possible with the help of contributors, veterans, insiders, and topic specialists. If you happen upon this text anywhere else on the internet or in print, please let us know at MilitaryFactory AT gmail DOT com so that we may take appropriate action against the offender / offending site and continue to protect this original work.

Specifications



Rheinmetall-Borsig AG - Nazi Germany
Manufacturer(s)
Albania; Bulgaria; Czechoslovakia; Finland; Hungary; Nazi Germany; Norway; Romania; Soviet Union
Operators National flag of Albania National flag of Bulgaria National flag of Czechia National flag of Finland National flag of modern Germany National flag of Nazi Germany National flag of Hungary National flag of Norway National flag of Romania National flag of the Soviet Union
1941
Service Year
Nazi Germany
National Origin
5
Crew
23,500
Units


ANTI-TANK / ANTI-ARMOR
Base model or variant can be used to track, engage, and defeat armored enemy elements at range.
FIRE SUPPORT / ASSAULT / BREACHING
Support allied forces through direct / in-direct fire, assault forward positions, and / or breach fortified areas of the battlefield.


20.3 ft
(6.2 meters)
Length
3,142 lb
(1,425 kg)
Weight
1.6 tons
(Light-class)
Tonnage


None. This is a towed artillery piece.
Drive System


1 x 75mm (7.5cm / 3in) main gun
AMMUNITION
Dependent upon ammunition carrier. AP and HE projectile types.


PaK 40 - Base Series Designation; many examples also fitted to vehicles.
7.5cm PaK 40 - Formal Designation
7.5cm FK 40 "Feldkanone" - Field Gun Usage


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