Accession Number : AD0353523

Title :   DEMONSTRATION OF A PROPULSION UNIT FOR THE COMBINED ROCKET-WARHEAD

Corporate Author : ROHM AND HAAS CO HUNTSVILLE AL

Personal Author(s) : Anderson, S. E. ; Sanders, B. ; Willoughby, D. A. ; Thies, C. E.

Report Date : 22 SEP 1964

Pagination or Media Count : 16

Abstract : The Combined Rocket-Warhead (CROW) is a concept for an artillery round in which the steel chamber of the propulsion unit is surrounded with a high-explosive. This Division was asked to demonstrate that a total impulse of 400 lbfsec could be delivered within the envelop restrictions and with less than a 200 F temperature increase on the external surface of the motor tube. Internal-burning-star and slottedtube grain designs were considered but an analysis of propellant strains at low temperature showed the slotted-tube grain to be superior. A plastisol nitrocellulose composite propellant (RH-P-340) containing 7% inert plasticizers was used for experimental firings. Thermal insulation and case protection were provided by an asbestos-phenolic material. Seventee CROW motors were fired; all ballistic data and pressure-time curves were satisfactory. The temperature at critical points were measured with thermocouples. Temperatures which could be expected in a thin-wall flight-weight motor were estimated. A computer program was used to analyze the effects of wall thickness and external insulation. Results of these analytical studies and experimental tests defined the insulation thickness required to hold the maximum temperature increase of the CROW motor to less than 200 F. (Author)

Descriptors :   *WARHEADS, *ROCKETS, PROPULSION SYSTEMS, ARTILLERY ROCKETS, SOLID ROCKET PROPELLANTS, ROCKET ENGINE CASES, PROPELLANT GRAINS, THERMAL INSULATION, SPECIFIC IMPULSE, CAPTIVE TESTS, TEMPERATURE, ASBESTOS, EPOXY RESINS.

Subject Categories : Rockets

Distribution Statement : APPROVED FOR PUBLIC RELEASE