Fuzes: D-4 (a).

Over-all length: 41 inches.

Length of body: 38 inches (including nose piece).

Diameter of body: 9 1/2 inches.

Thickness of wall: 1/16 inch.

Material of wall: Steel.

Type of suspension: Horizontal.

Suspension lug: Normal Navy type suspension lug.

Color and markings: Gray over all. One inch green band on nose. Brown band just aft of green band. Two 1/2 inch white bands in body mark position of binding straps.

Dimension of tail struts: None.

Material of tail: Sheet steel.

Type of filling: 40 1 kilogram high-explosive hollow charge bombs.

Weight of filling: 88 pounds.

Total weight of bomb: 132 pounds.

Charge/weight ratio: 66 percent.

Description: The canister consists of a blunt-nose assembly and a light tail piece, around which are fitted three steel segments held together by two circumferential metal retaining bands. Two steel wires, which are attached to the nose, run longitudinally along the canister and pass through the buckles of the bands locking them together. The buckles open automatically when the wires are withdrawn. The nose assembly is con-structed of two pieces held together by four lead sealing strips. The forward piece is hol-low and has a fuze pocket. The after piece contains a wooden disk. Set off center in the disk is a flat, round can housing a black powder burster charge in an annular silk bag. The eccentric position of the charge center the ignition hole of the can directly under the fuze and places the main portion of the charge near to the point at which the two steel release wires are attached to the nose-piece. This accounts for a more direct pull being exerted on the release wires when the burster charge detonates.

Operation: Upon release from the plane the aerial burst fuze function. The burster char-ge is fired shearing the lead sealing strips and blowing off the forward nosepiece. The nose-piece withdrawn the release wires from the buckles of the retaining bands which frees the segments of the canister. The 1-kilogram bombs separate and fall individually.

Figure 60 - Type 2 No. 6 Mk 21 Bomb Model 1.