Abstract: Slurried rocket propellants and a spinning rocket motor wherein the propents have viscosities which enable them to form central cores when spun in spinning rocket motors, the motor having a diaphragm-like base plate which assists in transferring forward momentum through the propellant.
Type:
Grant
Filed:
November 18, 1971
Date of Patent:
May 17, 1977
Assignee:
The United States of America as represented by the Secretary of the Navy
Inventors:
Ronald F. Vetter, James P. Diebold, George F. Sieg, Howard W. Gerrish, Jr., Howard H. Payne, Elmer J. Rhyn, Irvin F. Witcosky
Abstract: A high pressure vented toroidal shaped propellant chamber has an integrally ttached primer assembly which communicates therewith by a tubular spoke element. The vented propellant chamber is affixed to the rear end of a projectile. The propellant, when ignited, generates gases in the vented toroidal chamber providing the propulsion force needed to forcibly expel the projectile from a launcher. The caseless projectile attains a proper muzzle velocity without the use of a conventional cartridge case.
Type:
Grant
Filed:
February 23, 1976
Date of Patent:
March 29, 1977
Assignee:
The United States of America as represented by the Secretary of the Army
Abstract: 1. A method of making a solid propellant rocket motor having a shaped fuel charge which comprises the steps of: forming a one piece motor casing having an aperture therein, assembling within said one piece casing a mandrel having an overall diameter larger than the diameter of said aperture, casting a solidifiable propellant within said casing above said mandrel, curing said propellant and thereafter removing said mandrel from said motor.
Type:
Grant
Filed:
January 16, 1963
Date of Patent:
January 4, 1977
Assignee:
The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
Inventors:
Joseph G. Thibodaux, Jr., Donald J. Lewis
Abstract: A projectile having a chamber containing a propellant charge with an electric igniter and also having a chamber containing an explosive charge with a time delay fuse. The chambers are separated by a wall in which there is a firing pin actuated by pressure from the propellant charge when ignited to start the time delay fuse. The projectile has a safety pin locking the firing pin in ineffective position and which is withdrawable to arm the projectile. The fuse has a detonator spaced from the firing pin and a heat resistant resilient disc is interposed between the firing pin and detonator and is connected about the periphery to the wall on the side facing the detonator while a passage through the wall equalizes the pressures in the chambers.
Abstract: A projectile having an elongated body portion to the aft end of which is attachable a base constructed of thinner metal than the projectile body, there further being an isotropic charge positioned in the projectile which is subjected to pressure via the base when the charge is exploded in a gun barrel. Also taught is a method of assembling the charge into the projectile.
Abstract: A rocket motor nozzle closure for controlling the initial release of prese from the rocket motor nozzle to reduce the occurrence of high pressure shock fronts which are detrimental to the weapon operator. The mass and geometry of the nozzle closure are predetermined to fit the desired motor performance. The release of motor pressure is controlled by the rate of change of momentum of the nozzle closure.
Type:
Grant
Filed:
June 28, 1974
Date of Patent:
July 13, 1976
Assignee:
The United States of America as represented by the Secretary of the Army
Inventors:
Robert E. Betts, Lawrence B. Thorn, Albert R. Maykut
Abstract: An improved projectile suitable for use in artillery pieces, though preferably in the higher calibres, is disclosed wherein projectile range upon launching by the gun is considerably extended by means of a propellant rocket motor in combination therewith which motor is characterized by containing in its combustion chamber a flowable propellant charge in the form of a fluidizable, shapeable propellant charge composition which under the high radial acceleration forces imparted to the projectile when fired from a rifled gun barrel, flows and shapes itself into the shape of a hollow cylinder and, when ignited in flight, burns in the manner of a solid propellant grain of the same shape to aid in propelling the projectile a greater distance than is possible with the gun alone.
Abstract: Disclosed is a spear having an elongated rod to penetrate hard targets. The spear is delivered either from the air or the ground and is accelerated by a rocket motor to achieve the required impact velocity, for penetration.