elevation mechanisms. The launch racks were supported on pipes which run both horizontally and vertically and are fitted to a metal framework trunnioned to two vertical arms extending upwards from the pedestal base. Each launch rack was provided with a firing pin for a percussion cap which ignited its rocket. A single cocking handle on the left-rear of the launcher cocked all 35 firing pins and all rockets were launched at the same with no provision for single fire. Two safety devices were provided; the first was a button on the trigger handle which had to be released before the weapon could be fired, the second was a safety lever on the rear of the racks which when set to safe caused a metal surface to block the trigger linkage. Rockets The Raketen Sprenggranate was a spin-stabilized rocket with a length of and a weight of . The projectile was similar to the 7.3 cm Propagandawerfer 41 but instead of being filled with propaganda leaflets the Raketen Sprenggranate had an explosive warhead with dual fuzes. The first fuze was a nose-mounted percussion fuze that would explode on contact with a target while the secondary fuze was a time-delayed base fuze that was initiated during ignition of the rocket motor. When the fuze burnt out it would flash through an orifice in the base of the warhead which would detonate the main charge. The warhead for the rocket was ogival in shape and was threaded internally to receive the rocket motor. The explosive filling was a preformed charge of of RDX/TNT/wax pressed in a block and wrapped in wax paper. The rocket motor consisted of a cylindrical body and a cup-shaped base plate. The body was screwed into the warhead at the forward end and into the base plate at the rear. The body contained a single stick of solid fuel propellant which was ignited by a percussion cap which fit in a pocket drilled in the center of the base plate. Exhaust gasses were forced through seven straight inner venturis and seven angled outer venturis which imparted spin. In addition to its anti-aircraft and surface to surface roles the Raketen Sprenggranate also armed the Bachem Ba 349 Natter manned vertical take-off rocket interceptor. Twenty-four rockets were housed in the Ba 349's nose-cone. The Ba 349 was not operational before the end of the war, though the rocket weapon system was