CONSTRUCTION. In Type I the nose, body and tail cone are formed of fine concrete all in one piece. The four tail fins of sheet metal are filled to the tail cone when concrete is poured.

On either side of bomb are two cavities, which are covered by wooden slats. Cavities contain paper cartridges holding chalk and an ampoule of chlorosulphonic acid of fuming hydrochloric acid.

Type II is very similar, the differences merely being to allow for the insertion of a tracer candle, in the tail and a charging head for its initiation. (See fig. 67.)

Two steel wires lead from the fuze into the central stiffening tube and thence to a pair of terminal sockets in the tail cone. The tracer is fired by the terminal sockets on release from the plane and burns for approximately 55 seconds.

SUSPENSION. Vertical and horizontal.

COLOR AND MARKINGS. Sand color over-all. Stenicled on body – Type I "ehk elo3"; Type II, "ehk all3".

Figure 67 – ZC 50-kg Concrete Practice Bomb Types I and II