Accession Number:

ADA159870

Title:

Polar Moments and Ballistic Properties of Tri-Foil Penetrators.

Descriptive Note:

Final technical rept.,

Corporate Author:

ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

Report Date:

1985-09-01

Pagination or Media Count:

25.0

Abstract:

Early design tools for tri-foils involved the use of ersatz structures for analysis purposes. This paper presents a method that employs the actual shape to calculate the polar moments of inertia relative to a rod of equal cross sectional area. the method also degrades at its extrema into two logical shapes for this calculation, namely the circle and the equilateral triangle. A ballistic test was performed on a tri-foil having an effective aspect ratio of 14. Performance comparisons with a rod of aspect ratio 16 shows the ballistic performance of the tri-foil to be of the same order but marginally poorer. Systems considerations using tri-foils could make the tri-foil more attractive than the rod. Keywords Penetrators Finned rods Tubular projectiles Multiple targets Moments of inertia.

Subject Categories:

  • Ammunition and Explosives
  • Ballistics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE