Accession Number:

ADA247727

Title:

Sensitivity of Muzzle Velocity Repeatability to Variations in Initial Conditions

Descriptive Note:

Final rept. Jan 1987-Jan 1988,

Corporate Author:

ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

• Watson, C.
• Knapton, J. D.
• Boyer, N.
• Stoble, I. C.

Report Date:

1992-03-01

Pagination or Media Count:

31.0

Abstract:

Interior ballistic data from 20 tests with a 30-mm regenerative liquid propellant gun RLPG are examined. The tests are divided into four groups, with five tests in each group. The particular RLPG, referred to as Concept VI, is based on an annular-sheet-type of injector. The propellants used for the tests were liquid gun propellant LGP 1845 and LGP 1846. The mean muzzle velocity and the standard deviation for the first three groups was 855 ms 1.0, 903 ms 1.9, and 867 ms 2.1. For groups 2 to 4, the igniter charge was increased from 3.0 g to 3.5 g. The significant increase in velocity for the second group of tests could riot be explained by the small increase in the igniter charge. The increase in velocity, as well as the large standard deviations, is presently under study. Interestingly, the fourth test group, in which the initial conditions were more closely controlled, yielded a mean muzzle velocity of 873 ms with a standard deviation of 0.83. Because of the large variations in the first three group of tests, especially when compared with other RLPG firing test data, a study of some of the parameters was undertaken which might influence the muzzle velocity. regenerative liquid propellant gun, muzzle velocity, repeatability, liquid propellant.

Descriptors:

• *LIQUID PROPELLANT GUNS
• VELOCITY
• LIQUIDS
• PARAMETERS
• VARIATIONS
• MEAN
• INJECTORS
• STANDARD DEVIATION
• GUN MUZZLES
• MUZZLE VELOCITY
• INTERIOR BALLISTICS
• IGNITERS
• BALLISTICS
• GUNS
• PROPELLANTS
• SHEETS
• STANDARDS
• LIQUID PROPELLANTS

Subject Categories:

• Liquid Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE