Accession Number:

ADA458409

Title:

Small-Caliber Projectile Target Impact Angle Determined From Close Proximity Radiographs

Descriptive Note:

Final rept. Jan 2005-Jun 2006

Corporate Author:

ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Report Date:

2006-10-01

Pagination or Media Count:

50.0

Abstract:

Small-caliber rounds have a yaw cycle of approximately three meters, but the magnitude and initial yaw varies from shot to shot, even when fired from the same gun. This yaw cycle becomes a variable that researchers must consider when looking at the lethality of an individual shot and round type, especially when testing at close ranges where the yaw cycle is high. Four orthogonal radiograph images provided measured pairs of pitch, yaw and their Z-locations, a curve is fitted through all four pair of points using a fundamental Aerodynamic equation. The fitted curve is then carried out a know distance to the target where the curve provides an expected pitch, yaw, and total angle of attack at impact. Upon completion of a significant number of shots, this method can provide an accurate estimate of measurement error.

Subject Categories:

  • Ammunition and Explosives
  • Ballistics
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE