81 mm Mortar Motor Carriage M4
| GENERAL DATA | |||
| Other Designation(s) | - |
||
| Type | Mortar Carrier |
Radio Equipment | ? |
| Manufacturer(s) | White Motor Co. |
||
| Crew | 6 |
||
| Production Quantity | 572 |
Date of first acceptance | August 1941 |
| DIMENSIONS | |||
| Combat weight | 7970 kg |
Height | 2.27 m |
| Length | 6.01 m |
Ground clearance | 0.284 m |
| Width | 1.96 m |
Wheelbase | 3.442 m |
| Tread | 1.64 m (front) - 1.62 m (rear) |
||
| ARMAMENT | |||
| Primary Armament | 81 mm Mortar M1 (1) |
Ammunition Carried | 96-112 |
| Traverse | 60° to front (Manual) |
Elevation | +40° to +85° (Manual) |
| Traverse speed (360°) | - |
Sight | - |
| Secondary Armament | .30cal (7.62 mm) M1919A4 MG (2) |
Ammunition Carried | 2000 |
.45 cal submachine gun (3) |
600 |
||
| M1 Rocket Launcher (4) |
6 |
||
Grenades (5) |
12 |
||
Mines (6) |
12 |
||
| Location | 1: Mount M1 - 2: Flexible on skate
mount - 3/4/5: inside - 6: side racks |
||
| ARMOR | ||||
| Assembly | Bolting
|
|||
| Armor Detail | Front |
Side |
Rear |
Top/Bottom |
| Body | 6.4 mm / 66° (Radiator
louvres) 13 mm / 65° (Windshield cover) |
6.4 mm / 90° |
6.4 mm / 90° |
6.4 mm / 7° (Hood top)
& Open |
| AUTOMOTIVE | |||
| Engine | White 160AX |
Type & Displacement | L6 |
| Horsepower (maximum) | 147 hp at 3000 rpm |
Power/Weight Ratio | 18.44 hp / ton |
| Gearbox | Spicer 3461 constant mesh: 4 forward, 1 reverse |
Steering | Cam and lever, front wheels only |
| Brakes | ? |
Fuel Capacity | 227 L Gasoline (Petrol) |
| SUSPENSION | |||
| Type | Semi-elliptic longitudinal leaf
spring (Front) Vertical volute spring (Rear) |
Road wheels | Steel ventilated disc (Front) 1 bogie/track; 4 dual/bogie (rear) |
| Track return rollers | 1 dual/track |
Sprocket-Wheels | 18-tooth front drive |
| Idler Sprockets | Adjustable fixed at rear of track |
Shock absorbers | On front wheels |
| Track Type | Center guide band type | ||
| Width | 300 mm |
Pitch | 100 mm |
| Links(shoes) | 58 |
Track ground contact | 1.187 m |
| PERFORMANCES | |||
| Maximum Speed | 72 km/h on road |
Range | 320 km on road |
| Mileage | ? L/100 km on road |
Maximum grade | 31° (from horizontal) |
| Trench crossing | 0.76 m |
Vertical obstacles | 0.30 m |
| Maximum fording depth | 0.81 m |
Minimum turning diameter | 18 m |
| Sources | |||
| AFV Database | Vehicles.com | - |
|
Drawings |
File |
/USA/Models/8-Halftracks/M4-81mmGMC/Bt-off.jpg)
/USA/Pictures/USA/8-Halftracks/M4-81MMC-Bastogne/Bt-off.jpg)
