| A heavy-wall, high pressure ballistic evaluation motor has been developed with the capability to test at chamber pressures up to 6000 pounds per square inch. Existing equivalent sized sub-scale motors are limited to testing at pressures up to approximately 4000 pounds per square inch. Characterization at the higher pressures is necessary to ensure optimized motor design. The Army Ten-Pound Charge motor uses the industry standard 6x11 (6-inch diameter x 11-inch length) propellant grain dimensions. Test results, along with data analysis and uncertainty analysis, from thirty-two static firings are presented. The Army Ten-Pound Charge motor test results are compared with test results from an industry 6x11 subscale motor. The burning rate equations from the Army Ten-Pound Charge motor resulted in higher burning rates as compared to the industry motor. At 4000 pounds per square inch, the difference in burning rates ranged from one to six percent. |
