Tag Archive for 'self-propelled gun'

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Pz. Jäg. III/IV (“Nashorn”) für 8.8 cm Pak 43/1 (Sf) (Sd. Kfz. 164): S.P. Antitank Gun—”Rhinoceros” (formerly “Hornet”)

Pz. Jäg. III/IV ("Nashorn") für 8.8 cm Pak 43/1 (Sf) (Sd. Kfz. 164): S.P. Antitank Gun—"Rhinoceros" (formerly "Hornet")

The German 8.8 cm gun was designed in 1934 as the standard semimobile antiaircraft gun. Encouraged by success in Spain against armored vehicles the Germans went ahead with the production of A.P. ammunition for the weapon and the design of a more mobile carriage. Both were ready in time for the Battle of France. The 8.8 cm gun was a success in this battle, when it proved capable of dealing with the heavier French tanks, against which the standard German 3.7 cm A.T. gun was comparatively ineffective. The Germans next provided the gun with a new mounting from which the gun could engage tanks without being taken off its wheels. Finally a self-propelled mounting was introduced from which the gun can be fired against ground targets but cannot be used in its original A.A. role. Such an equipment is the tank destroyer “Hornet,” which consists of the 8.8 cm Pak 43/1 mounted on the chassis of a modified Pz. Kpfw. IV tank, the engine of which has been moved forward to a central position to provide a clear space for the fighting compartment at the rear. The “Hornet” mounts in effect the same gun as the “Ferdinand” but it is much more lightly armored and relatively much faster. Comparative figures for weight and maximum road speed of “Hornet” and “Ferdinand” are: 28 tons and 22 m.p.h., 80 tons and 12 1/2 m.p.h., respectively.

The 8.8 cm gun, fitted with muzzle brake, is mounted over the engine within a high, open-topped superstructure of thin armor plate and extends well over the front of the chassis. Its length, with muzzle brake, is 21 feet, 6 inches and its muzzle velocity with H.E. shell is 3,280 f.s.; with A.P.C.B.C. shell, 3,214 f.s. It will defeat 5 1/2 inches of homogeneous armor at 1,000 yards range and 30° angle of attack. Its maximum horizontal range is 16,200 yards and its rate of fire 15 to 20 rounds per minute.

SPECIFICATIONS

Weight         25 tons
Length (excl. gun) 19 ft., 4 ins.
Width 9 ft., 7 ins.
Height
Ground clearance 15 ins.
Tread centers 7 ft., 11 ins.
Ground contact 11 ft., 6 ins.
Width of track 15 ins.
Pitch of track 4 3/4 ins.
Track links 98
Fording depth 3 ft.
Theoretical radius of action:
     Roads (est.) 100 miles
     Cross-country (est.) 65 miles
Speed:
     Road 22 m.p.h.
     Cross-country 12 m.p.h.
Armor:
     Front plate 50 mm
     Sides 30 mm
Armament 8.8 cm Pak 43/1
Ammunition
Engine Maybach HL 120 TRM, 320 hp.
Transmission Synchromesh—6 speeds forward, 1 reverse
Steering Epicyclic, clutch brake
Crew 5

German: p. 34

Stu. G. IV (“Brummbaer”) für 15 cm Stu. H. 43 (Sd. Kfz. 166): S.P. Heavy Infantry Gun “Grizzly Bear”

Stu. G. IV ("Brummbaer") für 15 cm Stu. H. 43 (Sd. Kfz. 166): S.P. Heavy Infantry Gun "Grizzly Bear"

The 15 cm heavy infantry gun, in addition to being mounted on the Pz. Kpfw. I, II, and 38 (t) chassis, is also mounted on the Pz. Kpfw. IV chassis. In this combination it is known as the “Grizzly Bear.” While this vehicle is several tons heavier than the Pz. Kpfw. IV tank, the road performance of the two is similar. It is manned by a crew of five.

With the exception of the front, which incorporates the ball mounting for the gun, the sloping, four-sided gun shield is similar in construction to that of the “Bumble Bee,” although it is set farther forward on the hull. It is also similar to the shield on the “Wasp.”

It is probable that some rearrangement of the mechanical components of the chassis have been made in the “Grizzly Bear” as in the “Bumble Bee.” It is known that the armor on the hull front of the original tank has been increased from 50 mm to 100 mm and that on the sides from 30 mm to 40-50 mm. An additional circular strip of armor plate is bolted to the front of the shield around the ball mount of the gun.

The gun, which is a standard German infantry weapon, has a total length of 64.57 cm, approximately half of which extends beyond the ball mounting. No details of the performance of the gun in the above arrangement have been reported. However, comparative details may be found in the descriptive analysis of the equipment known as “15 cm s.I.G. 33 (Sfl.) auf Pz. Kpfw. II” in this catalogue. No auxiliary armament appears to be mounted on the “Grizzly Bear.”

SPECIFICATIONS

Weight         28.6 tons
Length 19 ft., 4 ins.
Width 9 ft., 7 ins.
Height (est.) 9 ft., 4 ins.
Ground clearance 15 ins.
Tread centers 7 ft., 11 ins.
Ground contact 11 ft., 6 ins.
Width of track 15 ins.
Pitch of track 4 3/4 ins.
Track links 98
Fording depth 3 ft.
Theoretical radius of action:
     Roads 95 miles
     Cross-country 60 miles
Speed:
     Road 25 m.p.h.
     Cross-country 12 m.p.h.
Armor
     Front plate 100 mm
     Sides 40-50 mm
     Shield (est.) 10 mm
Armament Stu. H. 43 (15 cm s.I.G. 33)
Ammunition 24 rds.
Engine Maybach HL 120 TRM, 320 hp.
Transmission Synchromesh—6 speeds forward, 1 reverse.
Steering Epicyclic, clutch brake
Crew 5

German: p. 33

Gw. I für 15 cm s.I.G. 33: S.P. Heavy Infantry Howitzer

Gw. I für 15 cm s.I.G. 33: S.P. Heavy Infantry Howitzer -- Bison I

This equipment consists of the 15 cm heavy infantry howitzer mounted on a turretless Pz. Kpfw. I model “B” chassis. This howitzer is also mounted on the Pz. Kpfw. II, and the Pz. Kpfw 38 (t) chassis. Due to the additional weight carried by the chassis, which approximates 3 tons more than its normal Pz. Kpfw. I complement, its road performance does not equal that of the Pz. Kpfw. I tank. The general appearance suggests that the equipment is overloaded.

The howitzer, which probably retains its wheels and trails, in addition to its original shield, traversing and elevating mechanisms, is mounted high in a tall, three-sided shield, and fires forward. The shield is 10 mm thick and is open at the top and rear.

The 15 cm. s.I.G. 33 is a standard German infantry support weapon. It has a length of 64.57 ins. and is used for either high or low trajectory shooting. It has a muzzle velocity of 790 f.s. and a maximum effective range of 5140 yards firing the 83.6 lb. H.E. shell with percussion fuze s.I. gr. Z. 23. The breech mechanism is of standard German type, and is similar to the 10.5 cm. l.F.H. 18 breech mechanism. The elevating gear is operated from the right. It consists of a worm gear, rack, pinion and shafting. The traversing gear is operated from the left by a system of gear wheels and shafting. The recoil system of buffer and recuperator is housed in a casing underneath the barrel.

Two types of ammunition are fired, the 15 cm I. Gr. 33 and the 15 cm I. Gr. 38. The two types of ammunition are for all practical purposes identical except that the former has a screwed-in base plate. The only other shell that this weapon is known to fire is a smoke shell, the 15 cm I. Gr. 38 Nb. The same percussion fuze, s.I. Gr. Z. 23, which weighs 75 lb., is used in each case.

SPECIFICATIONS

Weight         9 tons
Length 14 ft., 6 ins.
Width 6 ft., 9 ins.
Height (approx.) 11 ft.
Ground clearance 11 1/2 ins.
Tread centers 5 ft., 5 ins.
Ground contact 8 ft.
Width of track 11 ins.
Pitch of track 3 11/16 ins.
Track links 99
Fording depth 2 ft.
Theoretical radius of action
     Roads 87 miles
     Cross-country 72 miles
Speed
     Roads
     Cross-country
Armor
     Front plate 15 mm
     Sides 10 mm
     Gun shield 10 mm
Armament 15 cm S.I.G. 33
Ammunition (rds.)
Engine 100 h.p. Maybach Model N.L. 38 T
Transmission 5 speeds forward, 1 reverse
Steering Clutch brake
Crew         Probably 4

German: p. 5

Pz. Jäg. II Aus. A-E u.F für 7.5 cm Pak 40 (Sd. Kfz. 131): S.P. Antitank Gun

Pz. Jäg. II Aus. A-E u.F für 7.5 cm Pak 40 (Sd. Kfz. 131): S.P. Antitank Gun: Marder II

Produced in 1942. This antitank equipment was encountered in the battle of Tunisia. It is composed of the 7.5 cm antitank gun mounted on a Pz. Kpfw. II chassis and its road performance will closely follow that of the Pz. Kpfw. II tank.

The gun, which retains its original shield, recoil system, traversing and elevating gears, is mounted on a platform high on the hull and fires forward. A protective shield 10 mm thick, which slopes away to the rear of the chassis, has been provided. The shield is nearly rectangular except for a projecting portion in front of the gun mounting itself and the top and back are apparently open. The traverse of the gun is limited due to the gun shield fouling the protective shield. A barrel support for travelling is fitted in front of the hull.

The piece, 134 inches in length, is a monobloc type, semi-automatic, with horizontal sliding breech. It consists of barrel with shoes; breech ring with locking ring; breech block with firing mechanism; semi-automatic gear and muzzle brake. The recoil mechanism is comprised of a buffer cylinder, filled with a mixture of glycerine and distilled water, mounted in the cradle and secured by a nut to the front end plate. The piston rod, which is connected to the gun lug, is hollow, and is fitted with a bronze piston head. Ports are drilled in the conical part of the piston. A tapered rod is screwed into the front plug of the cylinder and projects into the hollow piston rod. During recoil the piston moves to the rear and the oil is forced from the buffer cylinder through the ports in the piston and hence through the annular space between the tapered rod and a bushing fitted in the piston. Recoil control is effected by a brass control plunger screwed to the end of the tapered rod. The recuperator is hydro-pneumatic.

SPECIFICATIONS

Weight         10 tons

Length 15 ft., 2¾ ins.
Width 7 ft., 4 ins.
Height 6 ft., 5¾ ins.
Ground clearance 13 ins.
Tread centers 6 ft., 2 ins.
Ground contact 7 ft., 10 ins.
Width of track 11 1/8 ins.
Pitch of track 3 5/8 ins.
Track links 105
Fording depth 3 ft.
Theoretical radius of action
   Roads 118 miles
   Cross-country 78 miles
Speed
   Roads 25 m.p.h.
   Cross-country 12 m.p.h.
Armor
   Front plate 15 + 20 mm
   Sides 15 mm
Armament 7.5 cm Pak 40 A.T. gun
   Max. effective range 3200 yards
   M.V. (Wt. 12.6 lb.) H.E. 1800 f.s.
   M.V. (Wt. 15 lb.) A.P.C. 2525 f.s.
   Elevation -5° to +22°
   Traverse 65°

    Penetration of homogeneous
armor—A.P.C.B.C. shell
  30° Normal
500 yds.         4.0″         4.8″
1000 yds. 3.6″ 4.3″
1500 yds. 3.2″ 3.9″
2000 yds. 2.8″ 3.4″
2500 yds.         2.5″         3.0″
Ammunition
Engine Maybach HL 62 TRM, 140 h.p.
Transmission Crash-type gear box, 6 fwd. speeds, 1 reverse
Steering Epicyclic clutch brake
Crew Probably 4

German: p. 11

Pz. Jäg. Tiger für 12.8 cm PJK 44 (Sd. Kfz. 186): Self-Propelled Gun

Jagdtiger

The Jägdtiger was the most formidable self-propelled antitank gun used by the Germans. It consists of a 12.8 cm PJK 44 (L/55) (less muzzle brake), mounted on a Tiger B chassis.

The hull consists of the normal Tiger B with a builtup superstructure to form a fixed turret. The front plate of the superstructure is 250 mm thick and slopes back at 15° to the vertical. It is made of one solid piece of cast steel armor. The sides of the superstructure are made in one piece with the sloped sides of the fixed turret and, like the Tiger B, are 80 mm thick sloped at 25 degrees. The rear plate of the superstructure is also 80 mm thick with a 10° slope.

The main armament consists of a 12.8 cm PJK 44 set in the center of the front plate of the built-up superstructure. It has a cast, bell-shaped gun shield similar in design to that of the 8.8 cm Kw. K. 43 on the Tiger B. The spherical housing of the gun cradle mounting pivots on a steel ball. The gun is electrically fired and has a vertical sliding breechblock. Separate loading ammunition is used, and the same cartridge case is utilized for armor piercing and high explosive rounds.

With A.P.C. ammunition, penetration of approximately 6 inches of armor at 1,000 yards at 30° is effected; with A.P.C.B.C. ammunition, the penetration is approximately 8 inches.

SPECIFICATIONS

Weight       77 tons
Length (overall) 23 ft., 11 ins.
Width (overall) 12 ft., 7 ins.
Height (overall) 9 ft., 3 ins.
Ground clearance 19 ins.
Tread centers 103/110 ins.
Ground contact 13 ft., 4 ins.
Width of track 26/31 1/2 ins.
Pitch of track 5.9 ins.
Track links 92 (46 double shoes)
Fording depth 69 ins.
Theoretical radius of action:
   Roads 106 miles
   Cross country 75 miles
Speed:
   Roads 23.6 m.p.h.
   Cross country 10 m.p.h.
Armor:
   Front plate of superstructure 250 mm at 15° to vertical
   Sides of superstructure 80 mm at 25° to vertical
Armament 12.8 cm PJK 44
Ammunition A.P.C.; A.P.C.B.C.
Engine Maybach HL 230
Transmission 8 speeds forward; 4 reverse
Steering Two radius system
Crew 6

German: p. 40 (August 1, 1945)

Pz. Jäg. “Tiger” (P) “Elefant” für 8.8 cm Pak 43/2 (Sd. Kfz. 184): S.P. Antitank Gun—”Elephant”

Pz. Jäg. Tiger (P), Elefant, für 8.8 cm Pak 43/2 (Sd. Kfz. 184)

The “Elephant,” weighing 72 tons, was the first of German heavy self-propelled antitank guns to be manufactured. It was designed and built under the supervision of Dr. Ferdinand Porsche and was first introduced under the name of “Ferdinand” in the Summer of 1943. The vehicle is actually improvised to utilize an unsuccessful tank produced by Dr. Porsche. Ninety of these vehicles were so converted. The armor is approximately 8 inches thick in the front of the hull and the sloping fighting compartment. The sides of the hull are 2 1/2 inches, the fighting compartment 3 3/4 inches thick; while the rear plates of the hull are 4 1/3 inches, and the fighting compartment 3 1/3 inches. The roof of the fighting compartment and belly plates are approximately 1 1/2 inches thick.

The “Elephant” is powered by two 12-cylinder Maybach H.L. 120 T.R.M. engines mounted centrally in the hull. From the engine the drive is taken forward directly to generators and thence to electric driving motors having a capacity of 230 Kw. at 1,300 r.p.m. which are mounted across the rear of the vehicle, under the floor of the fighting cab.

The suspension consists of six dual bogie wheels 26 3/4 inches in diameter on each side, mounted in pairs on stub axles which are bolted and welded to the hull; rear drive sprocket, and front idler. There are no return rollers.

The armament consists of a long-barreled 8.8 cm gun, with muzzle brake. It has an overall length of 22 feet, 11.63 inches, of which 13 feet, 1 1/2 inches projects beyond the mantlet. The gun is mounted on trunnions 8.8 cm in diameter which are located inside the ball joint in the front armor plate of the fighting compartment. The maximum elevation of the piece is 25°; traverseis 12° left and right.

SPECIFICATIONS

Weight       72 tons
Length 22 ft., 11 ins.
Width 11 ft., 5 3/4 ins.
Height 9 ft., 10 ins.
Ground clearance 19 1/2 ins.
Tread centers
Ground contact
Width of track 25 1/2 ins.
Pitch of track 5 ins.
Track links
Fording depth
Theoretical radius of action
   Roads 65 miles
   Cross-country 35 miles
Speed
   Road 12.5 m.p.h.
   Cross-country 6-9 m.p.h.
Armor
   Front plate 200 mm
   Sides (hull) 60 mm
Armament 8.8 cm Pak 43/2
MG 34
Ammunition 8.8 cm gun—70-90 rds.
MG—2,000 rds.
Engine 2 Maybach HL 120 TRM, 320 hp. each
Transmission Gas-electric, D.C. current, 650 amps @ 385 volts.
Steering Field control
Crew 6

German: p. 39 (August 1, 1945)

Sturmmörser: 38 cm Rocket Projector on Tiger E Chassis

Sturmmörser: 38 cm Rocket Projector on Tiger E Chassis

This equipment consists of a 38 cm rocket projector (Raketen Werfer 61) mounted on a modified Model E Tiger I chassis (see p. 38). A heavy rectangular superstructure of the type used on the German self-propelled guns replaces the normal superstructure and turret of the Model E. The rocket projector is mounted in the front plate of the superstructure, offset to the right of center. The superstructure is made of rolled armor plates and is of welded construction with the side plates interlocked with the front and rear plates. A heavy strip of armor is used to reinforce the joint between the front plate and glacis plate on the outside. Armor thickness varies from 40 mm to 150 mm.

The main armament, which fires a splined projectile 58.6 inches long (see page 354.2), differs radically in design and construction from any weapon previously examined. The barrel consists of a cast outer jacket, and a spaced liner of 1/2-inch steel. The latter, which is 74 1/4 inches long, is rifled, having nine grooves with right hand twist, one turn in 17.6 calibers. At the extreme rear, the grooves widen to aid in positioning splines near the base of the projectile. The liner is held in place by four steel blocks at the rear, and a perforated ring at the muzzle end. This ring has 31 equally spaced holes around its face. The breech mechanism is a horizontal sliding plate 2-5/16 inches thick opening from left to right.

The propellant gases are deflected between the tube and liner by an unusual obturator, and escape through a perforated ring at the muzzle. The metal obturator comprising a thin “L” shaped outer ring, a heavier “L” shaped perforated inner ring, and a spacer ring, fits into a circular recess in the front face of the breech plate. When the projectile is fired, the propellant gases pass through the ports to the chamber between the inner and outer rings. The face of the outer ring is forced against the rear face of the tube, and the sides against the recess in the breech plate, thereby obtaining the gas seal.

SPECIFICATIONS

(VEHICLE)
Weight (in action) (estimated)       68 tons
Length (overall) 20 ft., 8 1/2 ins.
Width (overall) 12 ft., 3 ins.
Height (overall including stowage crane) 11 ft., 4 ins.
Height (overall less stowage crane) 9 ft., 3 ins.
Ground clearance 17 ins.
Tread centers 9 ft., 3 1/2 ins.
Ground contact 12 ft., 6 ins.
Width of track 28 1/2 ins.—20 1/2 ins.
Pitch of track 5 1/8 ins.
Track links 96
Fording depth 70 ins.
Theoretical radius of action
   Roads 87 miles
   Cross-country 53 miles
Speed
   Roads 25 miles
   Cross-country 15 miles
Superstructure Armor
   Front plate 150 mm at 45° to vertical
   Projector mantlet (average) 69 mm rounded
   Projector shield (average) 150 mm rounded
   Side plates 84 mm at 20° to vertical
   Rear plate 84 mm at 10° to vertical
   Top plate 40 mm
   Spherical cradle 100 mm rounded
Ammunition (Rds.) 12
Engine Maybach HL 210, V-12, 630 hp.
Transmission Preselector, hydraulic—8 speeds forward, 4 reverse
Steering Controlled differential, hydraulic
Crew (unconfirmed) 7
 
(PROJECTOR)
Caliber 380 mm (14.96 ins.)
Length of tube 81 1/8 ins.
Length of liner 74 1/4 ins.
Thickness of liner 1/2″
No. of grooves 9
Width of grooves 0.4 in.
Width of grooves at rear 1.06 in.
Depth of grooves 0.2 in.
Twist of grooves Right hand, one turn in 17.6 caliber
Max. range (horizontal) 6,179 yds.
Firing mechanism Continuous-pull
Traverse 20°
Elevation (approx.) 85°
Depression (approx.)
Ammunition H.E. (R. Sprenggranate 4581)
  HEAT (R. Hollandungsgranat 4592)
Wt. of projectile* 761 lbs.
*Weight zones are marked to the nearest 5 kg. (12 lbs.)

German: p. 38.3-38.4 (June 1, 1945)

Pz. Jäg. IV für 7.5 cm Pak 39 (L/48): Self-Propelled Antitank Gun

Pz. Jäg. IV für 7.5 cm Pak 39 (L/48): Self-Propelled Antitank Gun

This equipment consists of a Pz. Jäg. IV chassis upon which is mounted a 7.5 cm Pak 39 (L/48). The chassis is a modified Pz. Kpfw. IV, designed to mount either the 7.5 cm Pak 39 (L/48) or the 7.5 cm Stu. K. 42 (L/70).

The chassis has upper and lower nose plates sloped at 45° and 57° respectively. The all-welded construction of the hull is retained, and this structure is strengthened by limited interlocking of the front plates. The main armament is mounted in the sloping front plate of a squat all-welded superstructure, and is offset 8 inches to the off-side of the center line. The mounting is of gimbal type, and is protected externally by a heavy casting. The superstructure is bolted through angle sections to the lower hull. The sloping sides of the superstructure are extended beyond the vertical hull sides over the width of the tracks, and the rear edges of the floor of the sponsons so formed are locked upon the hull angle section. The rear superstructure and engine cover plates are similar to those of the Pz. Kpfw. IV. Spaced plates of 5 mm armor are bolted to brackets welded to the basic side plates of the rear superstructure sides. The armor is treated with Zimmerit. Mechanically, the vehicle is similar to the Pz. Kpfw. IV, but with small modifications. The final spur gear carries 41 teeth instead of the 40 on the tank. The final drive sprockets are of cast steel with webs of flat section instead of the rounded spokes of the tank sprockets.

SPECIFICATIONS

Weight      
Length 19 ft., 4 ins.
Width 9 ft., 7 ins.
Height
Ground clearance 15 ins.
Tread centers 7 ft., 11 ins.
Ground contact 11 ft., 6 ins.
Width of track 15 ins.
Pitch of track 4 3/4 ins.
Track links 98
Fording depth 3 ft.
Theoretical radius of action:
   Roads 130 miles
   Cross country 80 miles
Speed:
   Roads 28 m.p.h.
   Cross country 15 m.p.h.
Armor:
   Front plate of superstructure 60 mm at 50° angle
   Sides of superstructure 30 mm at 30° angle
Armament 7.5 cm Pak 39 (L/48)
Ammunition (Rds.)
Engine Maybach HL 120 TRM, 320 hp.
Transmission Synchromesh—6 speeds forward, 1 reverse
Steering Epicylic, clutch brake
Crew 5

German: p. 34.2 (August 1, 1945)

Pz. Kpfw. IV für 2 cm Flakvierling 38: Antiaircraft Gun on Medium Tank Chassis

Pz. Kpfw. IV für 2 cm Flakvierling 38: Antiaircraft Gun on Medium Tank Chassis

This equipment consists of the four-barrelled 2 cm (.79 in.) antiaircraft gun mounted on the Pz. Kpfw. IV chassis. The gun has been mounted in an open topped, nine-sided turret. Elevation is from 10° to 90° and traverse is 360°.

The gun is the normal 2 cm Flakvierling 38 with the triangular base removed. Two guns are mounted on either side of the cradle. The guns are fired by a set of foot pedals; each pedal operates the trigger mechanism of the two diametrically opposite guns. The weapon is traversed and elevated manually by the gunner who also aims and fires it.

The 2 cm Flakvierling 38 is supported by two four-inch I-beams which are located 15 inches below the normal tank turret ring. The I-beams are in the center below the turret opening and extend across the width of the tank chassis.

There is no traversing rack on the turret ring. A rod from the gun upper carriage supports the gunner’s seat and is fastened by a U-bolt to the turret to form a connection between the gun mount and the turret armor. At the front of each side of the upper carriage is a collapsible rod which also can be fastened to the turret armor. In this manner, the gun mount and turret traverse together.

The turret is 43 inches high, 6 feet, 6 inches wide, and 8 feet long. The armor plate is 15 mm thick. Each side of the turret is composed of two plates of equal dimensions welded together. The top plates are sloped at an angle of approximately 30 degrees and the bottom plates are undercut at the same angle.

SPECIFICATIONS

Weight       26 tons (estimated)
Length 19 ft., 4 ins.
Width 9 ft., 8 ins.
Height 9 ft.
Ground clearance 15 ins.
Tread centers 7 ft., 10 7/8 ins.
Ground contact 11 ft., 6 ins.
Width of track 15 ins.
Pitch of track 4 3/4 ins.
Track links 98
Fording depth 3 ft.
Theoretical radius of action:
   Roads 130 miles
   Cross country 80 miles
Speed:
   Roads 25 m.p.h.
   Cross country 15 m.p.h.
Armor:
   Front plate of superstructure 85 mm at 10° to vertical
   Sides of superstructure 30 mm
Armament 2 cm Flakvierling 38
Ammunition H.E. Shell, tracer; H.E.-Incendiary; A.P. shell, tracer.
Rounds 16 clips in turret (20 rds in each); 15 boxes in tank.
Engine Maybach HL 120 TRM, 320 hp.
Transmission Synchromesh—6 speeds forward, 1 reverse
Steering Epicylic, clutch brake
Crew 5

German: p. 34.1 (August 1, 1945)

Pz. Jäg. IV für 7.5 cm Stu. K. 42 (L/70) Sd. Kfz. 162: Self-Propelled Antitank Gun

Pz. Jäg. IV für 7.5 cm Stu. K. 42 (L/70) Sd. Kfz. 162: Self-Propelled Antitank Gun

This self-propelled antitank gun consists of the 7.5 cm Stu. K. 42 (L/70) mounted on a modified Pz. Kpfw. IV chassis.

The vehicle is of all-welded construction except that the fighting compartment roof is bolted. The upper and lower nose plates are interlocked with each other and with the hull sides. The upper nose plate, set at an angle of 45° to the vertical, has a thickness of 80 mm. The lower nose plate, set at an angle of 55° to the vertical, has a thickness of 45 mm. The superstructure front plate is interlocked with the superstructure side plates and additional strength is provided by two brackets which are welded into recesses in the hull sides and bolted to plates welded to the superstructure front.

The crew compartment occupies the front three-quarters of the vehicle and accommodates a crew of five. The remaining quarter houses the engine which is the standard Maybach HL 120 as fitted in the Pz. Kpfw. IV.

The gun, which has no muzzle brake, is ballistically similar to the 7.5 cm Kw. K. 42 as mounted on the Pz. Kpfw. Panther. It is located eight inches to the right of the hull center line. The hydraulic buffer and hydropneumatic recuperator are mounted above the piece, the buffer being on the left. The recoil gear is protected by a cast mantlet with curved outer surfaces. Stowage is provided for 55 rounds of ammunition, all except four being stowed horizontally.

A port is provided in the superstructure front plate to the right of the 7.5 cm gun, behind which is a small machine gun ball mounting, five inches in diameter.

SPECIFICATIONS

Weight (approx.)       28 tons
Length 19 ft., 9 1/2 ins.
Width 10 ft., 4 /4 ins.
Height 6 ft., 5 ins.
Ground clearance 15 ins.
Tread centers 8 ft., 1 1/4 ins.
Ground contact 11 ft., 6 ins.
Width of track 15 ins.
Pitch of track 4 3/4 ins.
Track links 98
Fording depth 3 ft.
Theoretical radius of action
   Roads 130 miles
   Cross-country 80 miles
Speed
   Roads 28 m.p.h.
   Cross-country 15 m.p.h.
Armor
   Superstructure, front 80 mm at 50° to vertical
   Superstructure, sides (fighting compartment) 40 mm at 30°
   Gun Mantlet 150 mm (rounded)
   Upper nose plate 80 mm at 45°
   Lower Nose plate 45 mm at 55°
   Hull sides 30 mm (vertical)
Armament 7.5 cm Stu. K. 42 (L/70); one M.G.
Ammunition (Rds.) 55
Engine Maybach HL 120 TRM, 320 hp.
Transmission Synchromesh—6 speeds forward, 1 reverse
Steering Epicyclic, clutch brake
Crew 5

German: p. 32.3 (May 1, 1945)