Accession Number:

AD0802157

Title:

BODY NOSE SHAPES FOR OBTAINING HIGH STATIC STABILITY

Descriptive Note:

Memorandum rept.

Corporate Author:

ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

Report Date:

1952-02-01

Pagination or Media Count:

52.0

Abstract:

Wind tunnel tests at Ma 1.7 have been run on various projectile nose shapes as part of a program to develop a short length 105mm spin stabilized shaped charge projectile. For satisfactory flight it is required that the projectile have a center of pressure much further aft than is required on a conventional shell. This is due to the rearward C.G. position of the shaped charge and to the small amount of spin which can be used without seriously decreasing the effectiveness of a shaped charge. The nose configurations chosen for test were those generating a minimum amount of lift, but still maintaining the required standoff distance for the shaped charge. Most of the configurations which accomplished this purpose have the conventional ogive replaced by a spike which produces a region of separated flow between the tip of the spike and the front of the main body. The results show that rearward center of pressure positions can be obtained by using these special configurations, however, the drag is higher than for a forward center of pressure configuration. With these configurations which are 3.5 to 4 cal. long it is possible to obtain centers of pressure which are up to 76 of the length aft of the nose compared to 48 of the length obtained with a cone cylinder of the same length.

Subject Categories:

  • Ammunition and Explosives
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE