Over-all Length: 80 in.

Bombs recovered with Trialen filling have cylindrical paper wrapped pellets 1 15/16 in. in length and diameter forming a column along the main axis of the bomb. These pellets are composed of RDX/Alum/Wax. Some bombs have approximately 500 pellets in addition dis-tributed throughout the filling.

CONSTRUCTION. The SC 500-kg Grade III bomb is constructed in three sections: nose piece, center section, and tail closing assembly. The steel nose is cast and machined to the proper dimensions, and then welded to a drawn steel tube known as the center sec-tion. The tail closing assembly consists of a sheet steel dome, and a steel connecting ring. The flat steel connecting ring is riveted to the outside of the dome, and then the whole assembly is secured to the after end of the center section with 16 counter-sunk bolts. (See fig. 13.) The tail assembly is placed in this position only after the bomb has been filled with explosive.

There are two transverse fuze pockets in this series. The forward pocket generally con-tains the impact fuze and the after pocket has either a type 17 time fuze or a type 50 antidisturbance fuze. In case the bomb is to be used in antisubmarine work, the forward fuze pocket will contain a type 38 fuze. A kopfring will also be added for this type of work.

SUSPENSION. Horizontal suspension only by means of an "eye" bolt.

COLOR. Field grey, sky blue or aluminum body with yellow stripes on the tail cone. When a merchant ship silhouette is stenciled in yellow on the tail cone, it indicates Trialen (105) filler.

Figure 13 – SC 500-kg Bomb