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United States' M37 howitzer motor carriage

Photos

M37 Howitzer Motor Carriage:
United Stetes' M37 Howitzer Motor Carriage
Aberdeen Tank Museum

Design

Some felt that the M7 was too heavy so a M24 chassis was used.1,3 Standardized in November 1944.1 448 were ordered.1

Had drive sprocket in rear with individual torsion bar suspension. Had larger working space and storage space for ammunition than M7.1 It was powered by twin Cadillac engines. It had Hydra-Matic transmissions.

The 105 mm gun fired a 33 lb HE shell at a range of 12,200 yards.2

Production

  • M37 Howitzer Motor Carriage: 3161,3,4
    • Manufacturer: Cadillac (Detroit), Massey-Harris (Milwaukee)4, Cadillac2

Specifications

  M37 Howitzer Motor Carriage
Crew Commander, driver, gun crew (5)
71,2,3
Physical Characteristics  
Weight 40,000 lb, 46,000 lb3
20.5 tons1, 23 ton2
20,865 kg1
Length w/gun 18'1,2,3, 18' 2"
5.48 m1
Length w/o gun 18'3
Height 7' 4", 7.9'2, 7' 11"1,3
2.41 m1
Width 9' 8"1, 9.8'2, 9' 10"3
2.99 m1
Width over tracks  
Ground clearance 1' 5", 1' 6.375"3, 1' 6.4"2
Ground contact length 123"2, 124"
Ground pressure 10.1 psi, 11.7 psi2,3
Armament  
Main 105 mm M4 in M5 mount,
105 mm M4 howitzer1,2
105 mm howitzer3
Secondary  
MG 12.7 mm (.50 cal) MG
.50 cal M2 MG2
MG - antiaircraft  
Side arms .45 Submachine gun, 6: .30 carbines
Grenades
Quantity  
Main 263, 90, 1262
Secondary  
MG 500, 9902
Side arms .45: 600
Grenades: 8
Armor Thickness (mm) (Actual thickness of armor at horizontal)
Front: 0.5"2
Side: 0.5"2
Hull Front, Upper  
Hull Front, Lower  
Hull Sides, Upper  
Hull Sides, Lower  
Hull Rear  
Hull Top  
Hull Bottom  
Engine (Make / Model) 2: Cadillac 44T241
2: Cadillac2
Bore / stroke  
Cooling Water2
Cylinders V-82
Capacity  
Net HP 110@3,400 rpm2
2: 1103
Power to weight ratio  
Compression ratio  
Transmission (Type) Hydramatic2, Hydra-Matic
2 forward, 1 reverse2
8 forward 4 reverse
Steering Controlled differential2
Steering ratio  
Starter Electric2
Electrical steering 24-volt2,3
Ignition Distributor2
Fuel (Type) Gasoline2
Octane  
Quantity 110 gallons2,3, 115 gallons
Road consumption  
Cross country consumption 0.9 mpg2
Performance  
Traverse 22.5° each2, 45° up1
Speed - Road 30 mph1, 30 - 35 mph3, 35 mph2
48 kph1
Speed - Cross Country 5-25 mph2, 15 mph
Range - Road 100 miles1,3, 160 km1
85-125 miles
Range - Cross Country 100 miles2
Turning radius 23'3, 40'
Elevation limits +45° to -10°2
Fording depth 3' 6"4,6
Trench crossing 7', 9'4,6
Vertical obstacle 3'4,6, 3' 8"
Climbing ability 31° (60%) slope2,3
Suspension (Type) Vertical volute
Torsion bar2
Wheels each side 52, 6
Return rollers each side 3, 42
Tracks (Type) Steel block, with center guide, rubber bushings2
Length  
Width 16"2,3, 1' 4.5"
Diameter  
Number of links 753, 802
Pitch 5.5"2
Tires  
Track centers/tread 6' 11", 8'2

Sources:

  1. 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
  2. Tank Data, Aberdeen Proving Grounds Series, 1968?
  3. Profile AFV Weapons #46 Light Tanks M22 Locust and M24 Chaffee, Colonel Robert J. Icks, 1972
  4. Tanks of World War II, Duncan Crow, 1979
20th Century American Military History Crucial Site