Accession Number : ADA317942

Title :   Firing Data and Result from XM815/X-Rod Fin Slug Test.

Descriptive Note : Final rept. Oct 94-Jun 95,

Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Lyon, David H. ; DiFucci, John

PDF Url : ADA317942

Report Date : OCT 1996

Pagination or Media Count : 55

Abstract : The U.S. Army is developing a tank main gun cartridge referred to as X-Rod. The X-Rod munition combines a kinetic energy projectile with a rocket motor booster and on-board guidance system. This ammunition is designed to provide a high probability of kill out to extended ranges. One portion of this program is the development of a fin system to provide the projectile with the required aerodynamic stability. This system must be packaged within the allotted spatial constraints, dictated by the current 120-mm cartridge configuration, and the geometric requirements of the remaining cartridge components. A 'forward flip' deployment scheme has been selected to accomplish this goal. This concept includes eight rectangular fins that are attached to the projectile body via a single pivot pin. In the stowed position, the fins trail behind the projectile body. During in-bore travel, the fins remain in this stowed position until muzzle exit, when the blast acts to rotate the fins outward to the erected position. Several fin configurations were test fired to observe fin deployment characteristics. One of these arrangements included the addition of wedges to the fin tips to assist in fin deployment The results revealed that none of the configurations tested were able to consistently rotate the fins a full 90 deg.

Descriptors :   *FIN STABILIZED AMMUNITION, *FIRING RATE, REQUIREMENTS, POSITION(LOCATION), DEPLOYMENT, AERODYNAMIC STABILITY, PROJECTILES, CONFIGURATIONS, RECTANGULAR BODIES, AMMUNITION, GEOMETRY, GUIDANCE, TRAVEL, STORAGE, GUNS, KINETIC ENERGY PROJECTILES, WEDGES, ONBOARD, EXITS, BOOSTER ROCKET ENGINES, PINS, BLAST, FINS, GUN MUZZLES, INTERIOR BALLISTICS, PIVOTS, CARTRIDGES.

Subject Categories : Ammunition and Explosives
      Fire Control and Bombing Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE