Accession Number : ADP012472

Title :   On the Parasitic Mass of Launch Packages for Electromagnetic Guns

Corporate Author : DEFENCE EVALUATION AND RESEARCH AGENCY FARNBOROUGH (UNITED KINGDOM)

Personal Author(s) : Hinton, M. J. ; Cooper, N. R. ; Haugh, D. ; Firth, M. A.

PDF Url : ADP012472

Report Date : 26 APR 2001

Pagination or Media Count : 14

Abstract : Conventional gun and projectile design methodology has evolved over the last 50 years to a state where computer generated models can safely predict shot behaviour, from loading into the gun through to target impact. Long rod kinetic energy (KE) projectile packages with parasitic mass ratios (PMR) below 0.3 are becoming the norm for the conventional gun launched environment. In contrast, electromagnetic (EM) gun and projectile design methodology is far from mature, given the relative youth of the technology (< 15 years), the increased complexity of the governing physics and the scarcity of major programmes addressing the area. The Defence Evaluation and Research Agency (DERA) is investigating EM gun technology on behalf of the United Kingdom Ministry of Defence, as a possible contender for the direct fire role in a future armoured land vehicle. One of many key issues is to establish the bounds on the PMR for long rod EM KE packages. Initial UK designs of EM KE launch package have been of the circular bore, base-push', type where the armature is positioned behind the projectile. A comprehensive programme has resulted in a good understanding of the PMR bounds for this configuration. More recent studies have focussed on circular bore, mid-ride' concepts, where the armature is situated near the mid-point of the shot and there is potential to attain further reductions in PMR. The paper presents an overview of the UK KE launch package studies together with a more detailed assessment of the expected PMRs.

Descriptors :   *ELECTROMAGNETIC GUNS, COMPUTERIZED SIMULATION, ARMOR, ELECTROMAGNETIC FIELDS, METHODOLOGY, RATIOS, ENVIRONMENTS, IMPACT, PROJECTILES, TARGETS, PHYSICS, GROUND VEHICLES, BEHAVIOR, RODS, KINETIC ENERGY PROJECTILES, GUNFIRE, CIRCULAR, GUN LAUNCHED, BORES, YOUTH, UNITED KINGDOM.

Subject Categories : Guns

Distribution Statement : APPROVED FOR PUBLIC RELEASE