Accession Number : ADA330135

Title :   Investigation of Bulk-Loaded Liquid Propellant Gun Concepts.

Descriptive Note : Final rept. Jun 93-Nov 95,

Corporate Author : VERITAY TECHNOLOGY INC EAST AMHERST NY

Personal Author(s) : Talley, Robert L. ; Owczarczak, John ; Geise, Matthew

PDF Url : ADA330135

Report Date : SEP 1997

Pagination or Media Count : 127

Abstract : The approach of using chamber geometry (in the forms of stepped-wall and multichambers) in conjunction with using a repeatable igniter was investigated as a means for controlling the interior ballistic variability in 20-mm and 30-mm bulk-loaded liquid propellant guns (BLPGs). Full-scale, gun firing tests were conducted using the liquid monopropellant XM46 to experimentally develop a database for assessing the utility of these mechanical control concepts. The 3O-mm gun test data indicate that a useful degree of control of both the pressure-time trace shape and the projectile muzzle velocity may be achieved by using either a stepped-wall or a multichamber geometry, and that a useful degree of ballistic repeatability can often be achieved, even in a nonoptimized test gun. The 30-mm gun test data also indicate that the igniter needs to be tailored to the size and geometry of the input stage of the main liquid propellent chamber to achieve near-optimal ballistic repeatability.

Descriptors :   *LIQUID PROPELLANT GUNS, *INTERIOR BALLISTICS, FIRING TESTS(ORDNANCE), PROJECTILES, TIME SERIES ANALYSIS, PRESSURE, COMBUSTION CHAMBERS, GEOMETRY, REPRODUCIBILITY, IGNITERS, FLAMMABILITY.

Subject Categories : Ammunition and Explosives
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE