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Japanese Bomb, 2 kg Window

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1397-121

Description

Grey overall. Two yellow labels. One gives instructions for use, the other the following: Silver paper scattering bomb, manufactured October 1944, Navy Air Force Arsenal.

Bomb consists of a nose piece, body and end cap. Nose piece is made of wood and has a hole in the center to accommodate the string attached to the pull igniter. End of nose piece is sealed with a paper disk which is removed when the bomb is to be used. Nose piece is secured to body by six nails. Body is of light sheet metal construction, soldered longitudinally. After end is closed by an end cap of similar metal and held in place by a sealing tape.

Four equally spaced tail fins are soldered to the body, 1 inch from the after end of the case. Two sets of tail struts are utilized to support the fins.

Filling of the bomb case consists of 250 metal coated paper strips and an inner cylinder which contains the delay element and ejection charge. Inner cylinder is in the front end of the case. It is of light sheet metal construction and soldered longitudinally. A metal disk closes the nose end and another metal disk is soldered in place 1 5/8 inches from the tail end. Space between the two disks is filled with iron pyrite to make the bomb nose heavy. Each disk has a 1/2 inch hole in the center through which a metal tube is inserted. This houses a standard type pull igniter such as is used in the 5-kilogram parachute flare. An 11 inch length of safety fuse crimped into the after end of the igniter is led to an annular bag containing smokeless powder.

The 250 paper strips are just aft of the inner cylinder. Two L-shaped metal strips placed back to back hold 125 strips each. Four heavy cardboard strips surround the paper strips to insure their smooth ejection. The paper strips are covered on one side only by a metal foil.

Hazardous Components

Type of filling: 250 paper strips, cylinder containing iron pyrite.

Weight of filling: Paper strips, 10 oz, 0.28 kg; iron pyrite and cylinder, 20 oz, 0.57 kg.

See Also

Flare, 5 kg Parachute, Model 2 Modification 1

Source(s)

TM 9-1985-4, Japanese Explosive Ordnance (Bombs, Bomb Fuzes, Land Mines, Grenades, Firing Devices and Sabotage Devices) (1953)

OP 1667, Japanese Explosive Ordnance, Volume 1 (1946)