Accession Number : ADA119676

Title :   Deceleration of Projectiles in Snow,

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH

Personal Author(s) : Albert,Donald G ; Richmond,Paul W , III

PDF Url : ADA119676

Report Date : Aug 1982

Pagination or Media Count : 36

Abstract : Instrumented M374 projectiles were launched into snow, nylon, and Styrofoam targets using a 10.7-m radius centrifuge. For snow of 410-kg/cu m 3 density, the 3.1-kg test projectile experienced decelerations of approximately 220, 400, and 550 m/sq s (at a depth of 0.1 m) for initial impact velocities of 15,30 and 46 m/s respectively. These values disagree with values predicted from a simple hydrodynamic drag force approximation. The decelerations measured for snow targets were always greater than those measured for nylon shaving targets (of density 120 kg/cu m) indicating that this material is not a good analog for snow of the density used in these tests. (Author)

Descriptors :   *Projectiles, *Snow, Mortar ammunition, Launching, Centrifuges, Impact, Velocity, Penetration, Deceleration, Nylon, Particles, Styrene plastics, Foam

Subject Categories : Snow, Ice and Permafrost
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE