Fuzes: (With magazine) A-3 (a) or A-3 (b).

Over-all length: 42 inches.

Length of body: 21 inches.

Diameter of body: 9 3/8 inches.

Thickness of wall: 3/16 inch.

Material of wall: Steel.

Type of suspension: Horizontal.

Suspension lug: Normal Navy suspension lug.

Color and markings: Gray over all with two longitudinal diametrically opposite thin red lines. Red nose and red struts. New type markings will be found.

Length of tail: 21 inches.

Width of tail: 13 1/4 inches.

Width of tail fins: 6 inches.

Dimensions of tail struts: Length, 9 1/2 inches; width, 1 3/8 inches; thickness, 1/16 inch.

Material of tail: Sheet steel.

Type of filling: A central thermite core surrounded by solidified kerosene, petrol, alcohol-soap mixture.

Weight of filling: 20 pounds of inflammable mixture; 7.5 pounds thermite.

Total weight of bomb: 145 pounds.

Charge/weight ratio: 22 percent.

Construction of body: A cast-steel nose is attached to a tubular-steel body by a con-tinuous circumferential weld and 2 rows of 16 plug welds each. A wood block and black powder burster charge are located in the nose. Housed within the body is a steel cylinder which contains the incendiary filling. A central copper tube within the cylinder contains quick match. A tail cone is attached to a collar by a continuous circumferential weld and 16 plug welds. The collar fits into the after end of the body and is held there by 2 rows of 16 screws each.

Construction of tail: Four steel fins are welded to metal strips which are riveted (14 ri-vets each) to the tail cone. The fins are braced by a single set of box-type struts.

Operation: On impact the magazine in the nose fuze fires the black-powder charge which shears off the tail cone and ejects the incendiary cylinder out of the bomb case. At the same time the quick match is ignited. This in turns sets fire to the thermite and the inflammable mixture.

Figure 57 - Type 98 No. 7 Mk 6 Bomb Model 2.