15 cm siG33 (Sf) auf PzKpfw I Ausf B:
siG33 with 10th Panzer Division
Alkett converted 38 PzKpfw I Ausf B in mid 1939.5
Had entire carriage and wheels of 150 mm howitzer mounted. Had shield to partially protect crew.
Used in Poland, France in 1940, and in Russia. Equipped sIG Kompanien (heavy infantry gun companies) 701-706 and were used in Belgium, Holland, and France in 1940. The last ones in service were with the 704th schwere Infanteriegeschütz Abteilung of the 5th Panzer Division in Russia in mid-1943.
15 cm siG33 auf Fahrgestell PzKpfw II (SF):
Used a modified PzKpfw II chassis. It was widened and lengthened and an additional wheel was added. All were shipped to North Africa in 1942 to the 707 and 708 sIG Kp (SF) (heavy infantry gun companies). Took part in the Gazala spring offensive. Range of 4,700 meters. Used FuG Spr f radio.2
The 150 mm gun could fire a 36.8 lb HE shell at a muzzle velocity of 790'/sec.6
Sturminfanteriegeschütz 33B:
(Bundesarchiv, Koblenz)
Made from PzKpfw III chassis. Used FuG Spr d radio.2
| 15 cm siG33 (SF) auf PzKpfw I Ausf B | 15 cm siG33 auf Fahrgestell PzKpfw II (SF) | siG 33B | |
|---|---|---|---|
| Crew | 41,2,3 | 42, 56 | 52 |
| Physical Characteristics | |||
| Weight | 19,040 lb, 18,739 lb, 25,353 lb3 8,500 kg1, 11,500 kg3 8.35 tons1, 8.5 tons2,4,5 |
25,088 lb, 24,692 lb 11.2 tons2, 12 tons6 |
21 tons2 |
| Length w/gun | 14' 6", 15' 8.75", 15' 3.8"1, 15' 10.4"3 4.67 m1,2,4, 4.835 m3 |
15' 2.75"6, 17' 9", 18' 5.41 m2 |
5.4 m2 |
| Length w/o gun | |||
| Height | 7' 10.5"3, 8' 4.5", 9' 2", 9' 2.2"1, 2.4 m3, 3.35 m, 2.8 m1,2,4 |
5' 3"6, 6' 2.75", 6' 4" 1.9 m2 |
2.3 m2 |
| Width | 6' 9"1, 7' 10.5"3 2.06 m1,2,4, 2.4 m3 |
7' 4"6, 8' 6", 8' 8" 2.6 m2 |
2.9 m2 |
| Width over tracks | |||
| Ground clearance | 13"6 | ||
| Ground contact length | 94"6 | ||
| Ground pressure | |||
| Turret ring diameter | |||
| Armament | |||
| Main | 150 mm sIG33 L/112 150 mm1 150 mm Howitzer3 150 mm sIG334 |
150 mm sIG33 L/11 150 mm sIG33 L/122 150 mm Gun Model 19336 |
150 mm Stu I G L/112 |
| Secondary | |||
| MG | 7.92 mm MG342 | ||
| Side arms | |||
| Quantity | |||
| Main | 25 | 302 | 302 |
| Secondary | |||
| MG | 6002 | ||
| Side arms | |||
| Armor Thickness (mm) | 131 Front: 134 Side: 134 |
||
| Hull Front, Upper | 13@22°2 | 0.6"@0°6, 30@9°2 | 80@10°2 Mantlet: 30@10°2 |
| Hull Front, Lower | 13@27°2 | 30@15°2 | 30+50 or 50@21°2 |
| Hull Sides, Upper | 13@22°2 | 0.6"@0°6, 15@30°2 | 50@25°2 |
| Hull Sides, Lower | 13@0°2 | 15@0°2 | 30@0°2 |
| Hull Rear | 13@0°2 & 13@19°2 | 0.6"@0°6, 15@10°2 & 15@15°2 | 15@0°2 & 30 or 50@10°2 |
| Hull Top | 6@83-90°2 & 6@90°2 | 5@90°2 | 10@90°2 + 17@11-90°2 |
| Hull Bottom | 6@90° | 5@90°2 | 16@90°2 |
| Turret Front | 10@0-25°2 | 15@10°2 | |
| Turret Sides | 10@0°2 | 15@30°2 | |
| Turret Rear | open2 | open2 | |
| Turret Top | open2 | open2 | |
| Engine (Make / Model) | Maybach NL38TR1,2 Praga3 |
Maybach HL 62 TRM2 Maybach HL62 TR6 |
Maybach HL120TRM2 |
| Bore / stroke | |||
| Cooling | Water6 | ||
| Cylinders | 63 | 66 | |
| Capacity | |||
| Net HP | 1004, 1503 | 1406 | |
| Power to weight ratio | |||
| Compression ratio | |||
| Transmission (Type) | 5 forward, 1 reverse.2 | Synchromesh6 6 forward, 1 reverse2,6 |
6 forward, 1 reverse.2 |
| Steering | Clutch brake6 | ||
| Steering ratio | |||
| Starter | |||
| Electrical system | |||
| Ignition | |||
| Fuel (Type) | Gasoline6 | ||
| Octane | |||
| Quantity | 52 gallons6 | ||
| Road consumption | |||
| Cross country consumption | |||
| Performance | |||
| Traverse | 12.5° left, 12.5° right2,4, hand2 | 25°, 10°, hand2 |
3° left, 3° right2 |
| Max speed | 21.75 mph3, 24.9 mph1 35 kph3, 40 kph1,2,4 |
30 mph6 40 kph2 |
20 kph2 |
| Cross country speed | |||
| Road radius | 87 miles1, 115 miles3 140 km1,2, 185 km3 |
120 miles6 160 km2 |
110 km2 |
| Cross country radius | |||
| Turning radius | |||
| Elevation limits | -4° to +75°2,4 | +50°, -0° to +73°6 | -3° to +25°2 |
| Fording depth | 3'3 0.914 m3 |
3'6 | |
| Trench crossing | 6'6 | ||
| Vertical obstacle | 1' 6"6 | ||
| Climbing ability | 35° slope6 | ||
| Suspension (Type) | Independent leaf spring6 | ||
| Wheels each side | 5 bogie wheels6, 6 | ||
| Return rollers each side | 46 | ||
| Tracks (Type) | Steel, skeleton type with floating pin6 | ||
| Length | |||
| Width | 11 1/8"6 | ||
| Diameter | |||
| Number of links | 1056 | ||
| Pitch | 3 5/8"6 | ||
| Tire tread | |||
| Track centers/tread | 74"6 | ||
| Production | 1940: 381 Converted in 2/1940: 382 Chassis #s: 10478-165002 Alkett2 |
11/1941-12/1941: 122 1942: Maschinenfabrik Augsburg - Nurmberg6 |
Alkett2 12/1941-10/19422 Chassis #s: 90751-910362, 91401-917502 |
Sources:
- The Encyclopedia of Tanks and Armored Fighting Vehicles - The Comprehensive Guide to Over 900 Armored Fighting Vehicles From 1915 to the Present Day, General Editor: Christopher F. Foss, 2002
- Encyclopedia of German Tanks of World War Two, Peter Chamberlain and Hilary Doyle, 1999
- The Encyclopedia of Weapons of World War II, Chris Bishop, 1998
- Jane's World War II Tanks and Fighting Vehicles The Complete Guide, Leland Ness, 2002
- German Tanks of World War II, Dr. S. Hart & Dr. R. Hart, 1998
- Tank Data 2, Aberdeen Proving Grounds Series, E. J. Hoffschmidt and W. H. Tantum IV, 1969
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