U. S. GUN MOTOR CARRIAGE: (See figure 113.)

CARRIAGE, MOTOR, 155-MM GUN, M40.

MANUFACTURER: Pressed Steel Car Co.

COMBAT WEIGHT: 40.5 tons.

CREW: 8.

LENGTH: 20.6 ft. (29.7 ft. overall).

PITCH OF TRACK: 6 in.

WIDTH: 10.3 ft.

NUMBER OF TRACK LINKS: 79.

HEIGHT: 10.8 ft.

TRENCH CROSSING ABILITY: 7.7 ft.

GROUND CLEARANCE: 19.25 in.

FORDING DEPTH: 36 in.

TREAD CENTERS: 8. 4 ft.

OBSTACLE ABILITY: 34 in.

GROUND CONTACT: 164 in.

CLIMBING ABILITY: 31° (60%) slope.

WIDTH OF TRACK: 2 3 in.

GROUND PRESSURE: 10.7 lbs/sq. in.

TYPE OF TRACK: Rubber block, double pin shoe.

RADIUS OF ACTION: 107 mi.

FUEL CONSUMPTION: .5 mi/gal.

FUEL CAPACITY: 215 gal.

SPEED: 24 mph on roads; 5-20 mph cross-country.

ENGINE: Continental, nine cylinders, radial, air-cooled, gasoline, 400 HP at 2,400 rpm, compression ratio 5.7:1.

STARTER: Electric.

ELECTRICAL SYSTEM: 24-volt.

TRANSMISSION: Automatic, five speeds forward, one reverse.

IGNITION: Magneto.

STEERING: Controlled differential.

SUSPENSION: Horizontal volute spring. Three bogies of two wheels each and two return rollers on each side.

TURRET: None.

ARMOR: Front - .5 in.; side - .5 in.

ARMAMENT: One 155-mm gun M2, caliber length 45.

ELEVATION: -5° to +45°

MAX. RANGE: 25,715 yd.

TRAVERSE: 18° R or L.

AMMUNITION STOWAGE: 155-mm - 20 rds.

PROJ. WEIGHT: 95 lb.

REMARKS: This was the U. S. 155-mm "Long Tom" mounted on the tank chassis. It saw service in ETO in great numbers.

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