Accession Number : ADD015248

Title :   Rocket Nozzle Shield.

Descriptive Note : Patent, filed 8 Mar 91, patented 24 Dec 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Vollersen, Carl A ; Anderson, Thomas W ; Brown, Wayne M ; Pratt, Lozelle L

Report Date : 24 Dec 1991

Pagination or Media Count : 6

Abstract : A shield for the nozzle of the nozzle of a missile launched from the beneath the water, can be formed of a rigid plate spaced from the aft end of the nozzle to form a gap of area at least equal to the throat area of the nozzle. The gap reduces overpressure of the missile during launch while keeping water out of the nozzle by being directed perpendicular to the water flow direction. These objects of the invention and other objects, features and advantages to become apparent as the specification progress are accomplished by the invention according to which, briefly stated, a solid plate is fixed behind the rocket nozzle at a distance from the rim of the rocket nozzle sufficient to permit flow of gas between the plate and the rim. An important advantage of the present invention is simplicity and small expense. A further advantage is strength and ability to absorb a blow from a water jar. Another advantage is the ability to block the flow of water from behind the rocket without blocking the flow of gas. These and further objectives, constructional and operational characteristics, and advantages of the invention will no doubt be more evident to those skilled in the art from the detailed description given hereinafter with reference to the figures of the accompanying drawings which illustrate a preferred embodiment by way of non-limiting example.

Descriptors :   COSTS, FLOW, GAS FLOW, GUIDED MISSILES, INVENTIONS, LAUNCHING, NOZZLES, OVERPRESSURE, ROCKET NOZZLES, SHIELDING, THROAT, WATER, WATER FLOW

Subject Categories : Guided Munitions

Distribution Statement : APPROVED FOR PUBLIC RELEASE