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United States' M20 Armored Utility Car:

Photos

M20 Armored Utility Car:
United States' M20 Armored Utility Car
Aberdeen Tank Museum

Design

The Tank Destroyer Command requested a vehicle that would be a command car, personnel and cargo carrier, and a AA multiple MG mount. The design took the turret off the M8 and had an open vehicle with a centrally mounted .50 cal MG for AA protection. The ring mount was a type M66.1

Standardized in April 1943 as the Armored Utility Car M10. But to avoid confusion with the M10 tank destroyer it was changed to the M20.

Based on the M8 chassis.1,2 There were 2 wood bench seats and a rear seat for the crew. The right sponson had the radio and a map table was at the front.

Was intended to be used by commanders of mobile units and had command radio sets installed.1

The engines were in the rear with fans blowing to the rear, the M20 was often able to sneak up on opposition.

Could carry a bazooka and 5 .30 cal carbines. The bazooka fired a 3.41 lb round at a velocity of 300'/sec.1

Prototype

Prototype was built by Ford Motor Co.

Production

  • M20: 3,791
    • Manufacturer: Ford, General Motors Corp.1
    • Production: 1943 - 1944

Usage

The M20 could be used as a personnel or supply carrier, or as an observation post.2

Specifications

  M20
Crew 2 to 6, 61
Physical Characteristics  
Weight 12,800 lb, 15,650 lb1
Length 16' 5"1
Height 7' 4.5", 7' 7"1
Width 8' 4"1
Width over tracks  
Ground clearance 11.5"1
Ground contact length  
Ground pressure 12.7 to 14.35 psi
Turret ring diameter  
Armament  
Main .50 cal M2
.50 cal HB M2 MG1
Secondary  
MG  
Side arms 1: Bazooka M9A11, M181
Smokepots1
Antitank mines1
Quantity  
Main 1,000, 1,0501
Secondary  
MG  
Side arms Bazooka: 101
Smokepots: 41
Antitank mines: 31
Armor Thickness  
Hull Front, Upper 16 mm
5/8", 0.625"@0°1
Hull Front, Lower 19 mm
0.75"
Hull Sides, Upper 9 mm,
3/8", 0.375"@0°1
Hull Sides, Lower 9 mm,
3/8"
Hull Rear 9 mm,
3/8", 0.375"@0°1
Hull Top 6 mm,
0.25"
Hull Bottom 3 mm,
1/8-1/4"
Turret Front 19 mm,
0.75"
Turret Sides 19 mm,
0.75"
Turret Rear 19 mm,
0.75"
Turret Top  
Engine (Make / Model) Hercules JXD1
Bore / stroke  
Cooling Water1
Cylinders 61
Capacity  
Net HP 1101
Power to weight ratio  
Compression ratio  
Transmission (Type) Selective sliding gear
Synchromesh1
4 forward, 1 reverse1
Steering Worm and roller, front wheels only1
Steering ratio  
Starter  
Electrical system  
Ignition  
Fuel (Type) Gasoline1
Octane  
Quantity 54 gallons1, 56 gallons
Road consumption 5 mpg1
Cross country consumption  
Performance  
Traverse 360°1
Speed - Road 55 mph, 56 mph1, 60 mph
Speed - Cross Country 30 mph
Range - Road 250 miles1, 350 miles
Range - Cross Country  
Turning radius 28'1
Elevation limits  
Fording depth 2', 2' 8"1
Trench crossing  
Vertical obstacle 1'1
Climbing ability 30° slope1
Suspension (Type) Leaf spring
Semi-elliptical spring1
Wheels each side 6
Tires  
Track centers/tread 76"1
Tire size 9.00 x 201
Wheel base 79" + 48"1

Sources:

  1. Tank Data 2, Aberdeen Proving Grounds Series, E. J. Hoffschmidt and W. H. Tantum IV, 1969
  2. The Encyclopedia of Weapons of World War II, Chris Bishop, 1998
20th Century American Military History Crucial Site