Fuzes: Nose: A-1 (b), A-3 (c); Tail: Solid plug or D-2 (a), D-2 (b) or D-2 (c).

Over-all length: 24 1/2 inches.

Length of body: 13 1/2 inches.

Diameter of body: 5 3/4 inches.

Thickness of wall: 3/16 inch.

Material of wall: Steel.

Type of suspension: Horizontal.

Suspension lug: Two normal Navy suspension lug diametrically opposed.

Color and markings: Gray body and tail. A 2-inch silver band around the nose, a 1-inch silver band on the end of the tail fins, and two red lines diametrically run from nose to tail. New markings will be found.

Length of tail: 11 inches.

Width of tail: 6 1/8 inches.

Width of tail fins: 1 11/16 inches.

Dimensions of tail struts: Length, 4 1/6 inches; circumference, 3/16 inch.

Material of tail: Sheet steel.

Type of filling: Canister containing 168 phosporus-filled steel pellets. Picric acid in tail cone and central burster charge.

Weight of filling: Picric acid, 3.5 pounds.

Total weight of bomb: 70 pounds.

Construction of body: A cast-steel nose piece is circumferentially welded to a longitu-dinally welded steel body. A canister containing the incendiary pellets is fitted inside the body. A steel tube containing the central burster charge is screwed into the nose and extends the length of the body. A tail cone is circumferentially welded to a collar which threads into the after end of the body. The tail cone is filled with picric acid. A steel plate separates the explosive from the incendiary filler.

Construction of tail: Four steel fins are spot welded to the tail cone. They are braced by a single set of 3/16-inch round struts flattened at each end and riveted to the fins.

To impart the rotary motion necessary to arm the D-2 fuzes, the ends of the tail fins are bent to an angle of approximately 19°.

Remarks: A factory variation of the incendiary filling consists of 21 lengths of mild steel pipe, 1 inch in diameter, packed vertically in the canister. Each length is divided into 8 equal sections by being cut completely through except for 1/4 inch of circumference left along 1 side. The bomb contained 168 phosphorus-filled pellets.

Modification 1: A variation of this bomb listed as Modification 1 has four fins welded to the body and utilizes the new color markings. The fins, which are 6 inches long, 1 1/2 in-ches wide and 1/16 inch thick, are welded to the body at 4 5/8-inch intervals, two bet-ween each suspension lug. They are offset 35° from the longitudinal axis of the bomb and serve to accelerate its clockwise rotation. The bomb is painted gray. It has a silver nose tipped with green. The tail struts are red.

Figure 51 - Type 99 No. 3 Mk 3 Bomb.