7.5 cm Pak 40

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7.5 cm Panzerabwehrkanone 40
Pak40 parola 1.jpg
A Pak 40 75 mm anti-tank gun, displayed in Parola Tank Museum, Finland
Type Anti-tank gun
Place of origin Nazi Germany
Service history
In service 1942–1945
Used by Nazi Germany
Finland
Kingdom of Hungary[1]
Norway (postwar)
Wars World War II
Production history
Designer Rheinmetall
Designed 1939–1940
Manufacturer Rheinmetall
Produced 1942–1945
Number built Approx. 20,000[2]
Specifications
Weight 1,425 kg (3,142 lb)
(in action)[3]
Length 6.2 m (20 ft 4 in)
Barrel length 46 calibres

Shell 75×714mmR
Caliber 75 mm (2.95 inch)
Breech semi-automatic horizontal sliding block
Carriage split trail
Elevation -5° to +22°
Traverse 65°
Rate of fire 14 rounds per minute
Effective firing range 1,800 metres (5,906 ft) direct fire
7,678 metres (25,190 ft) indirect HE shell

The 7.5 cm Pak 40 (7,5 cm Panzerabwehrkanone 40) was a German 75 millimetre anti-tank gun developed in 1939-1941 by Rheinmetall and used during the Second World War. The Pak 40 formed the backbone of German anti-tank guns for the latter part of World War II.

Development[edit]

Development of the Pak 40 began in 1939 with contracts being placed with Krupp and Rheinmetall to develop a 7.5 cm anti-tank gun. Priority of the project was initially low, but following the invasion of the USSR in 1941 and the unexpected appearance of heavily armoured Soviet tanks such as the T-34 and KV-1, it was given an increased priority. The first pre-production guns were delivered in November 1941.[citation needed]

In April 1942, the Wehrmacht had 44 guns in service; by 1943 the Pak 40 formed the bulk of German anti-tank artillery.[citation needed]

Operational use[edit]

The Pak 40 was the standard German anti-tank gun until the end of the war, and was supplied by Germany to its allies. Some captured guns were used by the Red Army. After the end of the war the Pak 40 remained in service in several European armies, including Albania, Bulgaria, Czechoslovakia, Finland, Norway, Hungary and Romania.

About 20,000 Pak 40s were produced, and about 3,500 more were used to arm tank destroyers. The unit manufacturing cost amounted to 2,200 man-hours at 12,000 RM. A lighter automatic version, the heaviest of the Bordkanone series of heavy calibre aircraft guns, was used as the BK 7,5 in the Henschel Hs 129B-3 ground attack aircraft and the Junkers Ju 88P-1 bomber destroyer.

7,5 cm Pak 40 in Albania in 1943

Performance[edit]

The weapon was effective against almost every Allied tank until the end of the war. The Pak 40 was much heavier than the 5 cm Pak 38; its decreased mobility meant that it was difficult or even impossible to move without an artillery tractor on boggy ground.

The Pak 40 was first used in Russia where it was needed to combat the newest Soviet tanks. It was designed to fire the same low-capacity APCBC, HE and HL projectiles which had been standardized for use in the long barrelled Kampfwagenkanone KwK 40 tank-mounted guns. In addition there was an APCR shot (Panzergranate 40) for the Pak 40, a munition which - reliant on supplies of tungsten - eventually became very scarce.[4] According to the German Panzertruppen News Journal, 5,000 APCR rounds are expected in Dec. 1942 as replenishment for the Winter offensive. [5]

The main differences amongst the rounds fired by 75 mm German guns were in the length and shape of the cartridge cases as well as the primers used. The 7.5 cm KwK 40 (75x495mm) used in tanks had a fixed cartridge case twice the length of the 7.5 cm KwK 37, the short barrelled 75 mm used on earlier tanks, and the 7.5 cm Pak 40 cartridge is a third longer than KwK 40. The Pak 40 used a percussion primer while the vehicle mounted 75 mm guns used electrical primers. Other than minor differences with the projectiles driving bands, all German 75 mm guns used the same 75mm projectiles.

The longer cartridge case of the Pak 40, allowed a larger charge to be used and a higher velocity for the PzGr 39 armour-piercing capped ballistic cap round to be achieved. The muzzle velocity was about 790 m/s (2,600 ft/s) as opposed to 740 m/s (2,400 ft/s) for the KwK 40 L/43 and 750 m/s (2,500 ft/s) for the L/48.

For unknown reasons some 75 mm APCBC cartridges appear to have been produced with a charge which gave a muzzle velocity of about 770 m/s (2,500 ft/s). The first documented firing by the US of a Pak 40 recorded an average muzzle velocity of 776 m/s for its nine most instrumented firings.[6] Probably[citation needed] because of these results, period intelligence publications ("Handbook on German Military Forces") gave about 770 m/s as the Pak 40 APCBC muzzle velocity. Post war publications corrected this.[7]

German sources differ; the Official Firing Table document for the 75 mm KwK 40, StuK 40, and the Pak 40 dated October, 1943 gives 770 m/s on one of the APCBC tables.[8]

General characteristics[edit]

  • Caliber: 75 mm
  • Barrel length: L/46
  • Rifling: 32 Grooves, right-hand increasing twist, 1/24 to 1/18.
  • Length with the carriage: 6.2 metres (20.3 ft)
  • Length: 3.70 metres (12.1 ft)
  • Width: 2 metres (6.6 ft)
  • Height: 1.25 metres (4.1 ft)
  • Weight (combat ready): 1,425 kilograms (3,142 lb)
German Pak 40 75 mm
  • Traverse: 65°
  • Elevation: -5° to + 22°
  • Rate of fire: 14 rounds per minute
  • Engagement range: 1,800 metres (5,906 ft)
  • Indirect range: 7,678 metres (25,190 ft) m (HE shell)
  • Projectile weight: 3.18 kilograms (7.0 lb) to 6.8 kilograms (15.0 lb)
Pak 40 seen from the rear

Ammunition[edit]

Panzergranate 39 (PzGr. 39) - APCBC[edit]

An armour-piercing, capped, ballistic cap projectile with explosive filler and tracer.

  • Weight of projectile: 6.08 kg
  • Muzzle velocity: 790 m/s
Range Penetration
at 30 degrees from vertical [9]
100 m 106 mm
500 m 96 mm
1000 m 80 mm
1500 m 63 mm

Panzergranate 40 (PzGr. 40) - APCR[edit]

An armour-piercing, composite rigid projectile with a sub-calibre tungsten core.

  • Weight of projectile: 4.05 kg
  • Muzzle velocity: 990 m/s
Range Penetration
at 30 degrees from vertical [10]
100 m 143 mm
500 m 120 mm
1000 m 97 mm
1500 m 77 mm

Panzergranate 38 HL/B (PzGr. 38 HL/B) - HEAT[edit]

A high explosive anti-tank projectile with a shaped charge.

  • Weight of projectile: 4.57 kg
  • Muzzle velocity: 450 m/s
Range Penetration
at 30 degrees from vertical [11]
100 m 75 mm
500 m 75 mm
1000 m 75 mm
1500 m 75 mm

Penetration of armour 90 degrees incidence at 500 m[edit]

Round Muzzle velocity Penetration
Armour piercing 792 m/s 132 mm
APCR 933 m/s 154 mm
HE 550 m/s n/a

Survivors[edit]

Pak 40s are or have been lately held in several military museums, outside museums or free entrance open-air fields

A Finnish army Pak 40 in firing position during the Continuation War
Country Location Place
 Netherlands Zandoerle Centre village green [12]
 Belgium Ostend Atlantic Wall Open Air Museum, Raversijde
 Canada Borden, Ontario Base Borden Military Museum
 Canada Shilo, Manitoba The Central Museum of The Royal Regiment of Canadian Artillery
 Finland Miehikkälä, South Karelia Salpa Line Museum
 Finland Virolahti, South Karelia Bunker Museum
 Finland Parola, Western Finland Province Parola Tank Museum
 Finland Mikkeli, Southern Savonia Infantry Museum
 Finland Oulu, Northern Ostrobothnia Northern Brigade (Pohjan prikaati) memorial area, 2 pieces
 Finland Hämeenlinna, Tavastia Proper Artillery Museum of Finland
 Finland Hanko, Uusimaa Hanko Front Line Museum [13]
 Finland Helsinki Military Museum of Finland, Suomenlinna filial
 France Saumur Musée des Blindés or Association des Amis du Musée des Blindés [14][not in citation given]
 Germany Munster Deutsches Panzermuseum
 Romania between Sfantu Gheorghe and Oarba de Mures villages, on road 120, Mures county Oarba de Mures heroes monument, 2 pieces in open air
 Romania Bucharest National Military Museum, Romania, 1 piece in open air
 Serbia Belgrad Belgrade Military Museum
 Spain El Goloso, Madrid Museo de Unidades Acorazadas; and others
 USA Danville, Virginia American Armoured Foundation Tank Museum
 USA Tooele, Utah Privately owned collection
 USA Portola Valley, California Military Vehicle Technology Foundation
 UK Duxford Imperial War Museum[15]

See also[edit]

References[edit]

Notes
  1. ^ Rada, Tibor (2001). A Magyar Királyi Honvéd Ludovika Akadémia és a Testvérintézetek Összefoglalt Története (1830-1945) (in Hungarian) II. Budapest: Gálos Nyomdász Kft. p. 1114. ISBN 963-85764-3-X. 
  2. ^ "7,5 cm Pak 40". Panzerworld. Retrieved 21 October 2014. 
  3. ^ "7,5 cm Pak 40". Panzerworld. Retrieved 21 October 2014. 
  4. ^ One document, "Terminal Ballistics" stipulates production of Panzergranate 40 ceased entirely in 1943.
  5. ^ Nachrichtenblatt zur Panzerbeschusstafel 7,5 cm Pak 40 L/46 dated Nov. 1942
  6. ^ "First Report of Test of a German 75 mm Pak 40 Antitank Gun and Seventeenth Report on Ordnance Program No. 5772
  7. ^ Department of the Army Pamphlet No. 30-4-4, "Foreign Military Weapons and Equipment (U) Vol. 1 Artillery (U) dated August of 1955-this document was originally classified
  8. ^ "Schusstafel für die 7,5cm Kampfwagenkanone 40"
  9. ^ Nachrichtenblatt zur Panzerbeschusstafel 7,5 cm Pak 40 L/46 dated Nov. 1942
  10. ^ Nachrichtenblatt zur Panzerbeschusstafel 7,5 cm Pak 40 L/46 dated Nov. 1942
  11. ^ Nachrichtenblatt zur Panzerbeschusstafel 7,5 cm Pak 40 L/46 dated Nov. 1942
  12. ^ [1]
  13. ^ http://www.museot.fi/searchmuseums/index.php?museo_id=21070
  14. ^ http://www.museedesblindes.fr/spip.php?article15&lang=en
  15. ^ IWM collection record
Bibliography
  • Engelmann, Joachim and Scheibert, Horst. Deutsche Artillerie 1934-1945: Eine Dokumentation in Text, Skizzen und Bildern: Ausrüstung, Gliederung, Ausbildung, Führung, Einsatz. Limburg/Lahn, Germany: C. A. Starke, 1974
  • Gander, Terry and Chamberlain, Peter. Weapons of the Third Reich: An Encyclopedic Survey of All Small Arms, Artillery and Special Weapons of the German Land Forces 1939-1945. New York: Doubleday, 1979 ISBN 0-385-15090-3
  • Hogg, Ian V. German Artillery of World War Two. 2nd corrected edition. Mechanicsville, PA: Stackpole Books, 1997 ISBN 1-85367-480-X

External links[edit]