Accession Number:

AD0754405

Title:

The Effect of Previous High Velocity Rounds on Zone I Muzzle Velocities and Copper Pressures in 105MM and 155mm Howitzers

Descriptive Note:

Corporate Author:

ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

• Sarmousakis, James N.

Report Date:

1943-09-01

Pagination or Media Count:

21.0

Abstract:

It has been found that there is a monotonically increasing trend in Zone I velocities following high velocity rounds in 105mm Howitzer, M2E1, No. 3, firing Proof Slug, E2, and Shell, H. E., M1, and in 105mm Howitzer, M2A1, No. 79, firing Proof Slug, E2. Correspondingly, there appears to be a possible decreasing trend in copper pressures in both weapons firing both projectiles. This phenomenon has also been noted in the results of firings of 155mm Howitzer, T1, No. 2, firing Proof Slug, T11. The Zone I velocities in 105mm Howitzer, No. 79, firing Shell, H. E., M1, increased to a maximum, then decreased. The explanation of these trends as due to coppering of the bore and the use of decoppering agents to eliminate it have been discussed.

Descriptors:

• *HOWITZERS
• GUN BARRELS
• FIRING TESTS(ORDNANCE)
• FOILS(MATERIALS)
• PROPELLING CHARGES
• INTERIOR BALLISTICS
• PROJECTILE CASES
• RANGE TABLES

Subject Categories:

• Ballistics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE