Fuzes: A-2 (b), A-2 (d).

Over-all length: 26 inches.

Length of body: 17 3/4 inches.

Diameter of body: 4 inches.

Thickness of wall: 1 /32 inch.

Material of wall: Sheet steel.

Type of suspension: Horizontal or vertical.

Suspension lug: A typical Army suspension lug attached to a steel band around the body. Another suspension lug is fastened to a pipe which is part of the tail assembly.

Color and markings: Black over all. Red stripe on nose. Yellow stripe and white stripe for-ward of suspension lug.

Length of tail: 8 1/4 inches.

Width of tail: 5 1/2 inches.

Width of tail fins: 2 1/4 inches.

Dimsension of tail struts: Length, 3 3/4 inches; width, 1/2 inch; thickness, 1/16 inch.

Material of tail: Sheet steel.

Type of filling: Cast picric in a central exploder tube surrounded by steel pellets set in concrete.

Weight of filling: Picric acid, 3 pounds.

Total weight of bomb: 32 pounds.

Construction of body: The body is constrcuted of a light sheet steel cylinder which surrounds a steel central burster tube. The space between the tube and the outercast-ing is filled with steel pellets set in concrete. The nose of the bomb is slightly tapered. A steel adapter ring is welded to the end of the nosepiece. It is threaded internally to re-ceive another ring which contains the nose fuze pocket. The central burster tube is an explosive filled 1/8 inch steel cylinder, 2 3/8 inches in diameter and 16 1/2 inches long. A base plug is inserted into the after end of the central tube and held in place by a friction fit.

Construction of tail:  A steel pipe 7/8 inch in diameter and 9 inches long is welded to the base plug. Four tail fins are welded to the pipe and to the base plug. The tail fins are braced by a single set of box-type struts. A hinged lug for vertical suspension is atta-ched to the after part of the steel pipe.

Figure 21 - Type 97 15-kg. Concrete Bomb.