15cm schwere Infanteriegeschuetz 33 (Selbstfahrlafette) auf Panzerkampfwagen I Ausfuehrung B1-4
Sturmpz.I: General
Date of first production February 1940 Total acceptances 38 converted from Pz.Kpfw.I Ausf.B
Manufacturer Altmaerkische Kettenwerk, GmbH Crew 4 men
Sturmpz.I: Dimensions
Combat weight 19,000lbs
8500kg		 Height 110"
280cm
Length 174"
442cm		 Width 81.1"
206cm
Tread 65.7"
167cm		 Ground clearance 11"
29cm
Ground pressure, zero penetration 11psi
.76kg/cm²
Sturmpz.I: Armament
Type Mount Ammunition Traverse Elevation
15cm sIG33 L/11.4 Mount in hull center 25 rounds 25°
(12.5° left and right;
manual)		 +75° to -4°
(manual)
Sturmpz.I: Armor
Assembly
Welding and bolting
Hull
Location Thickness Angle from vertical
Gun shield front .40"
1.0cm		 0° to 25°
Upper front .51"
1.3cm		 22°
Lower front .51"
1.3cm		 27°
Gun shield sides .40"
1.0cm		 0°
Upper sides .51"
1.3cm		 22°
Lower sides .51"
1.3cm		 0°
Upper rear .51"
1.3cm		 0°
Lower rear .51"
1.3cm		 19°
Top .24"
.6cm		 83° to 90°
Floor .24"
.6cm		 90°
Sturmpz.I: Automotive
Engine Maybach NL38TR; 6 cylinder, inline gasoline
Horsepower 100@3000rpm Fuel capacity 39gal
146L
Transmission ZF Aphon FG 31, 5 speeds forward, 1 reverse
Steering Clutch-brake; steering levers
Sturmpz.I: Suspension
Type Road wheels Track return rollers
Helical and leaf spring 1 individually sprung/track;
2 bogies/track;
2 wheels/bogie		 4/track
Drive sprockets Idlers Shock absorbers
Front drive Adjustable at rear of track On first road wheel/track
Sturmpz.I: Track
Outside guide, single pin steel
Width 11"
28cm		 Pitch 3.5"
9cm		 Shoes/track 100 Ground contact length 108"
274cm
Sturmpz.I: Performance
Max level road speed 25mph
40kph		 Max trench 55"
140cm
Max grade 58% Max vertical obstacle 14"
36cm
Min turning diameter 6.9'
2.1m		 Max fording depth 24"
60cm
Cruising range ~85mi, roads
~140km, roads


Sturmpanzer I Bison removed the turret and superstructure from Pz.Kpfw.I Ausf.B and replaced it with the field carriage of the 15cm sIG33. The crew was protected by a large three-sided gun shield which was open at the top and rear. The modification added ~6000lb (2700kg) to the chassis, and the mechanical components had a hard time coping with this added weight.

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References

  1. Chamberlain, Peter, and Hilary Doyle. Encyclopedia of German Tanks of World War Two. Technical ed. Thomas L. Jentz. London: Cassell & Co., 2000.

  2. Hogg, Ian V. The Greenhill Armoured Fighting Vehicles Data Book. London: Greenhill Books, 2000.

  3. Parada, George. "Achtung Panzer! - PzKpfw I." Achtung Panzer! 1 Mar 2002 <http://www.achtungpanzer.com/pz11.htm#panzer1>. Achtung Panzer!

  4. Siemers, Cary. "Germany's Self Propelled Guns." World War II Tanks & Vehicles and Advanced Squad Leader. 1 Mar 2002 <http://www.wwiivehicles.com/html/germany/selfpropelledguns.html>.



Last updated 1 Mar 2002.

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© Copyright 2002 Chris Conners