GB594513A - Improvements in or relating to projectiles operating with rocket propulsion - Google Patents

Abstract

594,513. Rockets. BURNEY, SIR C. D. Sept. 4, 1940, Nos. 13863/40, 13865/40, 13882/40 and 3098/41. [Class 9 (i)] In a rocket intended to be fired from a gun, the rocket charge 4 is in a thinwalled casing 3, Fig. 1, and provision is made to ensure a balance between the pressure inside and outside this casing when the gun is fired. The inside pressure may be derived by leakage from the external pressure or by internally generated gases. The driving band is situated in front of the rocket casing 3. The rocket charge may be built up of a number of separate cylinders, side by side, Fig. 3 (not shown). When a considerable rocket charge is required, it may be made in two separate lengths 4a, 4b, Fig. 7, of cordite separated by a perforated disc 5 to prevent damage to the charge by the shock of discharge. There may be a single central nozzle or several nozzles 11, Fig. 1, which may be parallel to the axis or may be inclined thereto to cause rotation. Or as in Fig. 7, there may be nozzles 28, 29 at the rear end and also nozzles 26 around the middle part of the rocket casing which may be in two parts 22, 23. The rate of burning of the rocket charge may be controlled by an adjustable spring-loaded valve such as 29. For cleaning the gases from unburnt _particles before they reach the nozzles, the gases are passed through diverting devices such as socket 7, Fig. 1, with axial inlet 8 and radial outlets 9, or a socket with an, internal baffle and an external spiral baffle, Fig. 5 (not shown), or a long central tube containing a spiral baffle, Fig. 6 (not shown). The rocket may be fitted like a bullet in the mouth of a propellent cartridge to be used as fixed ammunition, Figs. 10 and 11 (hot shown). Guns have to be suitably modified or designed to discharge such rockets, for example as described in Specification 594,515. Specifications 579,968, [Goup XXXIII], and 594,514 also are referred to.