US Bomb, 1100 lb GP, M33




Prior to the organization of the AN Standardization board in 1941, these bombs were designated as “Demolition H.E." bombs; under the standardization policy they were retitled as “General Purpose High Explosive (G.P.H.E.)” bombs.

Targets: Ammunition dumps, railway engines, and cars, all types of construction, and aircraft on the ground.

Body construction: These bombs may be made by any one of the following methods: (1) From seamless steel tubing in which the nose of the bomb is formed by swaging and the tail by drawing to the necessary diameter; or (2) the case may be forged in one piece; or (3) it may be formed from cast sections welded together. These bombs have female base filling plates.

Type of suspension: Horizontally, by dual lugs.

Construction of suspension lug: Two eyebolts welded to body along the longitudinal axis of the bomb. The eyebolts are formed from bar steel, shaped in the form of a U, and then welded to the body.

Color and markings: Prior to 11 March, 1942, these bombs would have been painted yellow all over, with black manufacturer’s markings; since that date they have been painted olive drab with a one-inch yellow band around the nose and base and a 1/4 inch band around the center of gravity.

Material of tail: Sheet steel.

Tail construction: This type of tail consists of the following parts: (1) a cast-steel sleeve secured to the body of the bomb by a fin-locking nut; (2) four fins or vanes; and (3) internal box-type struts. One vane and one strut are pressed from one piece of metal, and the four pieces are welded to one another and to the sleeve.

Type of filling: (1) 50/50 Amatol. Since Amatol is hygroscopic, TNT surrounds are placed around the nose and tail booster sleeves to seal the Amatol from moisture: (2) 100% TNT, which will be stencilled on the bomb. All of this series except the 100-pound M30 contain two built in Auxiliary Boosters M104. one in the nose and one in the tail, which contain tetryl.

See Also

Nothing else to see.


Collaborative Ordnance Data Repository

OP 1664, Volume 2 - US Explosive Ordnance (1947)

USNBD - Bombs and Fuzes, Pyrotechnics (1945)

TM 9-1904, Ammunition Inspection Guide (1944)