Accession Number : AD0890098

Title :   Effect of Spin on the Aerodynamics of the 20mm Projectile,

Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s) : Darling, John A. ; Knott, Joseph

Report Date : 24 SEP 1971

Pagination or Media Count : 44

Abstract : The effect of spin on the aerodynamics of the 20mm projectile was studied from experimental measurements of static stability, axial force, roll damping, Magnus forces and base-pressure surveys made in the NOL Supersonic Tunnel Numers 1 and 2 over a Mach number range of 0.8 to 5 and at Reynolds numbers high enough to ensure a turbulent wake. (Author)

Descriptors :   (*SPIN STABILIZED AMMUNITION, AERODYNAMIC CHARACTERISTICS), (*PROJECTILES, SPIN STABILIZED AMMUNITION), WIND TUNNEL MODELS, SPINNING(MOTION), DRAG, SKIN FRICTION, ANGLE OF ATTACK, FORCE(MECHANICS), MAGNUS EFFECT, STATISTICAL DATA.

Subject Categories : Ammunition and Explosives
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE