15 cm Wurfgranat 41: 15 cm Rocket Projectile

This rocket is fired from the German 6-tube Nebelwerfer 41. It resembles an elongated shell with a bulbous ballistic cap. The propellant is contained in the forward part of the projectile and the filling in the rear behind the ring which houses the jets. The propellant powder burns from both ends, giving faster and more even burning. The nozzles are arranged around a projecting annular jet unit about two-thirds of the distance from the nose. The jets are set at an angle to give the projectile rotation in flight, thereby eliminating the use of fins.

A complete round of this rocket projectile is composed of the following components (refer to photograph above): (i) pressed metal ballistic cap, which is screwed onto the projectile; (j) a motor tube; (d) an aluminum disk containing a black powder igniter charge; (a) a pressed metal spacer upon which the sticks of powder rest; (e) seven sticks of uniperforated stick powder; (b) a cellulose igniter tube containing black powder; (c) a cast-iron trap, which is placed over the powder at the rear end of the motor tube; (f) a black powder igniter charge, which is placed over the cast-iron trap; (h) a nozzle assembly, which is screwed to the motor tube; (g) an electric primer, which is inserted in any of the 26 nozzle holes; (1) a pressed iron spacer which fits into the base of the nozzle assembly and provides an air void between the nozzle assembly and the TNT bursting charge; (h) a bursting charge of TNT or a chemical filler contained in a fiber container; (m) a machined steel bursting-charge container; (o) a booster adapter, which screws into the bursting-charge case; (n) a base percussion fuze, which screws into the booster adapter. This fuze is similar to most German base percussion fuzes and arms by centrifugal force.

TYPES

German: p. 356