Tag Archive for 'panzerbüchse'

2.8/2.0 cm Pz. B. 41: Tapered Bore Antitank Gun

2.8/2.0 cm Pz. B. 41: Tapered Bore Antitank Gun

The German antitank gun, Pz. B. 41, captured in the vicinity of Halfaya Pass during the Libyan campaign in 1941, is the first tapered-bore weapon to be found in combat use. Served by a five-man crew, it is normally towed on a trailer, but can be broken down into five loads and transported on a truck or in an airplane.

The tube, which is of heavy monobloc or cold worked construction, is modeled on the Gerlich principle—that is, it is tapered from 28 mm at the breech to 20 mm at the muzzle in order to increase the velocity. No provision is made for cooling the barrel, which is good for about 400 rounds. The forward end of the tube has a muzzle brake threaded to it; the back is attached to the breech ring by an interrupted screw arrangement.

The firing mechanism, of the inertia type, consists of the firing-pin, firing-pin guide, spring and retainer. A breechblock of the horizontal sliding block type is actuated, after cocking, by an operating handle attached to the top of the breech ring.

Both the carriage and pedestal are of welded construction. Shields fixed to the carriage by metal hooks and spring plungers are constructed of steel plates about 3/8 inch thick. Detachable trunnions for fastening the gun and recoil mechanisms to the pedestal permit quick assembly and breakdown of the piece.

The wheels are of the perforated disk type and have pneumatic tires mounted on them. These tires, which are probably Lynthetic, have no valve stems, indicating that they are filled with a cushioning material.

The trails are of the split type and can be locked together or spread at an angle of about 45°.

The gun is flexible on its mount, and as no elevating or traversing gears are employed, these operations are most likely manual. A straight tube telescope is used.

SPECIFICATIONS

Caliber            28 mm at breech
20 mm at muzzle
Weight (complete) 491 lb.
     (tube) 76 lb.
     (barrel & brake) 80 lb.
Length of barrel 61.36 ins.
Breech mechanism Horizontal sliding block
Firing mechanism Inertia type
Recoil mechanism Hydro-spring
Normal recoil 9.34 ins.
Rate of fire 8 to 10 rds./min.
Muzzle velocity 4,550 f/s
Range (effective) 500 yds.
Ammunition A.P. (9,754.4 grs.)
Peneration

        Range       Thickness of armor in inches
Yards         30°         Normal
1002.73.3
2002.53.0
3002.22.8
400       2.1       2.6

German: p. 131

7.92 mm M SS 41: Antitank Rifle

7.92 mm M SS 41: German WW2 Antitank Rifle

This antitank weapon, a manually operated, magazine-fed, air-cooled, high-velocity rifle which was standardized for production in 1941, fires the same necked-down cartridge as the Panzerbüchse 39. Although classified as an antitank rifle, the use of heavier armor on modern tanks has rendered the weapon effective against lightly-armored vehicles only.

A hinged bipod similar to that of the MG 34 is attached to the front of the receiver jacket. It folds forward for convenience in carrying. The gun is also equipped With carrying handle and sling; the former is fitted to the top of the barrel group, and the latter is attached on the right side at the bipod and back plate assembly.

A “U” type rear sight and an adjustable front sight of the square block type fold to the rear when not in use.

The gun is put in a “Safe” position by pulling the barrel housing lock extension 1/4-inch to the rear so that its rear alignment mark is aligned with the mark “S” on the barrel housing lock. When in this position, the trigger cannot be pulled, nor can the action be opened. If the trigger is pulled while the action is not entirely closed, the gun will not fire. It is necessary to release the trigger and pull it again in order to release the sear. When the magazine is empty, the action is kept open by the protrusion of the magazine follower which stops the rearward movement of the barrel housing.

SPECIFICATIONS

Caliber         7.92 mm (.312 in.)
Weight (with empty magazine) 29 3/4 lbs.
Length (overall) 59 1/4 ins.
Sight radius 30 15/16 ins.
Principle of operation Manually operated
Feeding device Magazine
Capacity of feeding device 6 rounds
Cooling system Air
Ammunition types 13 mm case necked down to 7.92 mm. Same as used in the PZ B39. See Page 211.)
Rate of fire
Type of sight “U” type rear sight; square block type front sight.
Weight of barrel (w/ fittings) 13 1/4 lbs.
Length of barrel 43 3/8 ins.
Length of rifling
Rifling
     Twist R.H.
     Form
     No. of grooves 4
     Depth of grooves
     Width of grooves
Muzzle velocity (estimated) 3,540 f/s
Type of mount Bipod

German: p. 210.1

7.92 mm PzB 35 (p): Antitank Rifle (Ex-Polish)

7.92 mm PzB 35 (p): Antitank Rifle (Ex-Polish)

During the Polish invasion, the Germans captured large numbers of the Mascerzek Model 35, 7.92 mm antitank rifle. These were used extensively in the earlier part of the war.

This Polish rifle is a weapon similar in design to a Mauser rifle firing a normal cartridge, but it is longer and heavier, and a muzzle brake has been attached. It led to the development of the German rifles, known as the Pz. B. 38 and Pz. B. 39.

This weapon is a bolt-action gun of the modified Mauser type and has a detachable box magazine. It is carried by a sling attached in the usual manner. It may be recharged with ammunition by exchanging the magazine or by reloading the empty magazine with single rounds. The body is a hollow cylinder with an ejection and loading aperature on top and a magazine slot at the bottom. The bolt is cylindrical with a straight lever at right angles on the right side (in the closed position).

The barrel, which is parallel throughout most of its length, increases in diameter toward the breech until it equals that of the body. At the muzzle, a portion is threaded to take a muzzle brake. The bipod is of light construction and is attached to the barrel by a yoke. The legs of the bipod terminate in circular shoes which are cut away on the inside to clasp the barrel when they are folded forward in a closed position. The magazine is of the box type.

SPECIFICATIONS

Caliber         7.92 mm (.312 in.)
Weight 20 lb. (approx.)
Length 5 ft., 10 ins.
Ammunition Steel jacket with A.P. steel core and lead antimony filler
Sights Rear, fixed; front, adjustable blade
Capacity 5 rds., in clips
Muzzle velocity 4,100 f/s

German: p. 210

7.92 mm Panzerbuchse 39 (Pz. B. 39): Antitank Rifle

7.92 mm Panzerbuchse 39 (Pz. B. 39): Antitank Rifle

The German antitank rifle, Pz. B 39, 7.92 mm, is a weapon of opportunity which is used by the German Army against vehicles having light and medium armor. It fires a cartridge similar to that used in the Polish Mascerzek antitank rifle. This cartridge also resembles the American .50/.30 which has been under development in this country since 1931.

The projectile has a tungsten carbide core and is known to have a small pellet of a lachrymator as well as a tracer mixture. Penetrating power of the bullet at 300 yards’ range is 3/4 inch at 20°, and 1 inch at normal against face-hardened plate. At 100 yards’ range, penetration is 1 1/4 inches at normal.

The weapon has proved to be a simple and reliable gun. The recoil is comparatively light. The rifle is manually loaded and fired single shot from the shoulder with the aid of a bipod. It is equipped with a circular turbine muzzle brake.

The Germans also have an earlier version of this weapon known as the Pz. B 38 which is 7 pounds heavier, has a self-ejecting action, and is more elaborate than the hand-operated Pz. B 39. It fires the same ammunition as the more recent rifle.

The Pz. B 39 uses ammunition boxes holding 10 rounds each, mounted on brackets on each side of the wood stock. These are not magazines but serve to hold the ammunition so that it can be quickly and easily removed for hand loading.

SPECIFICATIONS

Caliber         7.92 mm (.312 in.)
Weight 27.25 lb.
Length (with shoulder stock extended) 62.25 ins.
Ammunition 13 mm case necked down to 7.92 mm. Bullet has tungsten carbide core with tracer and lachrymotor mixture.
Sights Rear, fixed with open U notch. Front covered blade.
Capacity Single rounds
Muzzle velocity 3,540 f/s

German: p. 211