DESCRIPTION. The H.E. body is of two-piece welded construction and is threaded inter-nally at the after end to receive the motor body. The booster pocket and fuze adapter is welded in position at the forward end. (See fig. 219.)

The motor contains the propellant charge and igniters and is threaded internally to recei-ve the venturi assembly. A realy igniter charge, consisting of three bags of gunpowder, is located in the perforation in the central propellant grain. The venturi assembly is drilled to form 32 jets at an angle of 14°. In the center of the assembly is located a threaded hole for the electric squib. A rear spacer ring welded to the forward end of the venturi assembly acts as a grid and positions the outer row of propellant grains.

REMARKS. 1. The German designation for this round is "38 cm R.Sprgr. 4581".

2. The round is painted dark green over-all, with an 0.8-inch white band painted around the center of gravity, and with black stencilling.

3. This round is notable among German rockets because of the steel splines inserted in the after end of the motor. These splines engage the rifling of the projector liner and aid in imparting an initial rotation to the projectile.

Figure 219 – 38-cm H.E. Rocket