Initial production Test of Cartridge, 81-mm, HE, M374A2 with Reduced Bourrelet and Waterproofed Ignition - Propellant System
Abstract
An initial production test was conducted on the 81-mm mortar cartridge, HE, M374A2 (M374E5) which features a reduced bourrelet and a water resistant ignition - propellant system. Various tests were conducted to determine if the test item was equal to or better than the M374E5 test cartridge submitted previously for US Army Test and Evaluation Command evaluation. Residue tests were satisfactory; velocity level differences of test rounds were significant though of small magnitude compared with the control (M374), and velocity and range dispersion were equal to or better than the control; pressures were satisfactory; test rounds did not perform as well as previously in waterproofness tests because the ends of the propellant bags were sewed and not heat-sealed as in the earlier version; there were short rounds in the rain test, but none in the puddle or humidity test; rough handling tests using charge protector muffs were satisfactory; solar-radiation tests with charge protection were satisfactory; and cook-off hazards and maintenance with test rounds were not significantly different from that experienced with control rounds. United States Army Infantry Board representatives found no human factors problems except that the white increment protector muffs should be black or brown to conform with current camouflage techniques.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1970
- Accession Number
- AD0871225
Entities
People
- V. H. Mccoy