Type 97 50-kg. Incendiary BombType 100 50-kg. Smoke Bomb
Japanese Explosive Ordnance – Bombs, Bomb Fuzes, Land Mines, Grenades, Firing Devices
and Sabotage Devices
Chapter 1 – Section 1
Japanese Army Bombs
Type 100 50-kg. Incendiary Bomb

Fuzes: A-2 (a), A-2 (b), A-2 (c).

Over-all length: 40 1/2 inches.

Length of body: 23 3/4 inches.

Diameter of body: 7 inches.

Thickness of wall: 1/8 inch.

Material of wall: Steel.

Type of suspension: Horizontal.

Suspension lug: Normal Army type.

Color and markings: Gray over-all with a white band forward of the suspension lug and a red band around the nose.

Length of tail: 16 3/4 inches.

Width of tail: 9 3/4 inches.

Width of tail fins: 4 1/2 inches.

Dimensions of tail struts: Length, 5 5/16 inches; width, 1 1/2 inches; thickness, 1/16 inch.

Material of tail: Steel.

Type of filling: 400-450 rubber bungs (1 inch long by 1 inch diameter) impregnated with phosphorus dissolved in carbon disulphide. The high-explosive charge in the nose and central burster tube is picric acid.

Weight of filling: Incendiary filling, 35 pounds; picric acid, 5 pounds.

Total weight of bomb: 97 pounds.

Charge/weight ratio: 44 percent.

Construction of body: A steel nosepiece is held by three grub screws to a steel sealing plate. The plate is welded to a tubular steel body by a continuous circumferential weld. A burster tube threads into the sealing plate and the joint is made airtight by a lead was-her. A tail cone is welded to the after end of the body.

Construction of tail: Four steel fins are welded to the tail cone and are braced by a single set of box-type struts.

Figure 15 - Type 100 50-kg. Incendiary Bomb.

Type 97 50-kg. Incendiary BombType 100 50-kg. Smoke Bomb