DESCRIPTION. This rocket resembles an elongated gun projectile with a bulbous nose cap. The round consists of a forward motor body containing the seven single-perforated propellant grains and the after H.E. conatiner.(See fig. 211.) An enlarged diameter ogival ballistic cap is threaded to the forward end of the motor, and a venturi assembly with 26 drilled jets threads over the base of the motor. The venturi assembly also is threaded ex-ternally at its after end to receive the machined steel bursting charge container. An H.E. charge in a fiber container is placed in the steel shell case, separated from the base of the motor by an iron spacer to provide an insulating air void between the H.E. and pro-pellant charges. A booster adapter, containing the booster charge and threaded to re-ceive the base fuze, screws into the base of the H.E. shell.

The propellant grains are supported fore and aft on a pair of metal grids. A black powder igniter charge is placed over the rear grid, and a second black powder charge is contai-ned in an aluminum holder between the head of the motor and the forward grid. The two charges are connected by a black powder filled cellulose tube, which passes through the perforation of the central grain. An electric igniter is fitted into 1 of the 26 jets.

Figure 211 – 15-cm H.E. Rocket