Fuzes: B-5 (c).

Over-all length: 11 3/8 inches.

Length of body: 5 1/2 inches.

Diameter of body: 2 3/8 inches.

Thickness of wall: 1/32 inch.

Material of wall: Steel.

Type of suspension: Carried 36 in a container which is fuzed with a D-4 (a).

Suspension lug: None.

Color and markings: Bomb body may be steel gray or black. Tail assembly and fuze are aluminum colored.

Length of tail: 5 7/8 inches.

Width of tail: 2 3/8 inches.

Width of tail fins: Approximately 1 inch at the widest point.

Dimension of tail struts: Diameter, 2 3/8 inches; length, 1 3/8 inches.

Material of tail: Light tinned steel.

Type of filling: Type 97 (TNT, 60 percent; HND, 40 percent).

Weight of filling: 1 pound 1 ounces.

Total weight of bomb: 2 pounds 3 ounces.

Charge/weight ratio: 50 percent.

Construction of body: The body is of one piece ligth steel construction. It is cylindrical in shape, rounded at the nose and threaded in the base to receive the fuze assembly. The inside of the body is coated with lacquer.

Construction of tail: The tail assembly is made of light tinned steel and is secured to the fuze body by four screws. Four fins spaced 90° apart are soldered to the tail cone and are braced by a ring strut at the after end. An arming spindle extends from the fuze up through the tail cone, and has vanes attached at the end. A drogue holds the vanes in a safe position.

Operation: When the bomb falls free from the container, the drogue retaining the vanes is carried away by the wind, allowing the vanes to rotate. The motion of the vanes is transmitted through the reduction gear system to the spindle which is threaded out of the striker. To prevent rotation of the striker, a key and keyway system is incorporated in the fuze body and striker. As the spindle rises, it also lifts the gear frame to which is secured a pin retaining the safety detent. The safety detent, which fits through the fuze body into the striker and holds it in position, is spring loaded outward, and removal of the safety detent pin permits it to fly out. With the spindle and detent removed, the heavy striker is held up only by a weak creep spring, which it overcomes on impact, initiating the gaine.

Figure 63 - 1-kg. Antipersonnel Bomb.