United States of America as Represented by the Secretary of the Air Force

Ford Aerospace & Communications Corporation

Arnold J Laderman

Frederick M Bergthold, Jr

Harold J Haskins

An electromagnetic gun assembly includes a gun barrel, a projectile structure disposed within the gun barrel, and a plurality of bore rider members disposed between the projectile structure and the gun barrel. The bore rider members are dimensioned and arranged to maintain the projectile structure spaced-apart from the gun barrel, restrict lateral movement of the projectile structure relative to the gun barrel, accommodate ablative mass loss, and accommodate static and dynamic gun barrel expansion. Each bore rider member has a tapered shape that includes converging first and second surfaces, the first surface facing the gun barrel, the second surface facing the projectile structure, and the first and second surfaces converging in a direction opposite to a direction of acceleration in which the projectile structure is to be accelerated along the gun barrel. Each bore rider member is moveably disposed in a position such that as ablative mass loss occurs to the bore rider member, it moves relative to the projectile structure in the direction in which the first and second surfaces converge to remain wedged between the projectile structure and the gun barrel.

Electromagnetic gun bore rider

A laser beam duct pressure controller system for maintaining a spatially uniform pressure in a flowing gas volume which is subjected to temporal pressure variations. This desired result is accomplished, with cooperating structural components (and gases therein) which eliminate the axial flow of a conditioning gas within the laser beam duct, by matching the time rate of change of the pressure of the flowing conditioning gas to the time rate of change of the pressure in the cavity of an operably associated laser beam turret.

Growing community of inventors

Laguna Beach, CA, United States of America

Arnold J Laderman