Germany's 10.5 cm Sturmhaubitze 42, SdKfz 142/2; 10.5 cm Sturm-Haubitze 42
Photos
Design
The first prototype was completed in March 1942. Was based on the same hull and superstructure as the StuG III Ausf F, StuG III Ausf F/8, and StuG III Ausf G. The improvements made during production for the StuG III Ausf G were also made to the StuH 42. 10% of production was dedicated to the StuH 42.2
It originally had an electrically fired 10.5 cm 1918 light field howitzer, with a muzzle brake, installed.2 In 1944, the muzzle brake was deleted to economize on production.2
The 105 mm gun fired a 32.7 lb at a velocity of 1,772'/sec to a range of 9,077 yards.3
Prototype
Production
- StuH 42: 1,210
Variants
- StuH 42 Ausf F:
- StuH 42 Ausf G:
Usage
From 1943 these were issued to Sturmgeschütz detachments. At Kursk there were 68 available to Army Groups Center and South.
Specifications
| StuH 42, SdKfz 142/2 | |
|---|---|
| Crew | Commander, gunner, loader/radio operator, driver 41,3 |
| Radio | FuG151 |
| OR | FuG161 |
| Physical Characteristics | |
| Weight | 53,760 lb 23.9 tons, 24 tons1, 24.5 tons2, 26.4 tons3 |
| Length w/gun | 20' 2" 6.14 m1 |
| Length w/o gun | 17' 9", 18'3 5.59 m |
| Height | 6' 5", 7'3 2.16 m1 |
| Width | 9.5'3, 9' 8" 2.95 m1, 2.96 m |
| Width over tracks | |
| Ground clearance | 15.4"3 0.39 m |
| Ground contact length | 112.5"3 2.86 m |
| Ground pressure | 14.9 psi3 1.04 kg/cm2 |
| Turret ring diameter | |
| Armament (mm) | |
| Main | 105 mm StuH 42 L/281,2,3 |
| Secondary | |
| MG | 2: 7.92 mm MG341 |
| MG - coaxial | 7.92 mm MG34 |
| MG - internal | 7.92 mm MG34 |
| Side arms | |
| Quantity | |
| Main | 361,2,3 |
| Secondary | |
| MG | 6001 |
| Side arms | |
| Armor Thickness (mm) | Front: 2"+1.2"3 Side: 1.2"3 |
| Hull Front, Upper | 50+30 or 80@10°1 Mantlet: 50 or 50+3-@0°1 |
| Hull Front, Lower | 50+30°1 or 80@21°1 |
| Hull Sides, Upper | 30@11°1 |
| Hull Sides, Lower | 30@0°1 |
| Hull Rear | 30@0°1 & 50@10°1 |
| Hull Top | 11-17@75° to 90°1 Mantlet: 30@90°1 |
| Hull Bottom | 16@90°1 |
| Superstructure Front | |
| Superstructure Sides | |
| Superstructure Rear | |
| Superstructure Top | |
| Engine (Make / Model) | Maybach HL 120 TRM1,3 |
| Bore / stroke | 4 cycles3 |
| Cooling | Water3 |
| Cylinders | V-123 |
| Capacity | |
| Net HP | 300@3,000 rpm3 |
| Power to weight ratio | |
| Compression ratio | 6.5:13 |
| Transmission (Type) | Synchromesh, ZF SSG 77. Synchromesh3 6 forward, 1 reverse.1,3 |
| Steering | Clutch brake3 |
| Steering ratio | |
| Starter | Hand inertia and electric3 |
| Electrical system | Starting: 24-volt3 Normal: 12-volt3 |
| Ignition | |
| Fuel (Type) | Gasoline3 |
| Octane | |
| Quantity | 82 gallons3 310 liters |
| Road consumption | 1.7 mpg3 |
| Cross country consumption | 0.7 mpg3 |
| Performance | |
| Traverse | 10° left, 10° right, hand.1,2, ±203 |
| Speed - Road | 25 mph3 40 kph1 |
| Speed - Cross Country | 15 mph3 |
| Range - Road | 96 miles3, 105 miles 155 km1, 169 km |
| Range - Cross Country | 59 miles3 90 km |
| Turning radius | 5.8 m |
| Elevation limits | -6° to +17°3, -6° to +20°1,2 |
| Fording depth | 2' 9", 35.4"3 0.8 m |
| Trench crossing | 8' 6" 2.59 m |
| Vertical obstacle | 23.6"3, 2' 0.6 m |
| Climbing ability | 30° (57%) slope3 |
| Suspension (Type) | Torsion Bar3 |
| Wheels each side | 63, 6x2 |
| Return rollers each side | 33, 3x2 |
| Tracks (Type) | Dry pin3 |
| Length | 9' 2.5" |
| Width | 8' 2.5", 15.75"3 40 cm |
| Width of link | 1' 3.75" |
| Diameter | |
| Number of links | 923 |
| Pitch | 4.9"3 |
| Tire tread | |
| Track centers/tread | 8.25'3 2.5 m |
Sources:
- Encyclopedia of German Tanks of World War Two, Peter Chamberlain and Hilary Doyle, 1999
- German Tanks of World War II, Dr. S. Hart & Dr. R. Hart, 1998
- Tank Data, Aberdeen Proving Grounds Series, 1968?
