Accession Number : AD0858636

Title :   Follow-Up Work on Fibrous Suppressors for Lance Early-Reaction Problem.

Descriptive Note : Technical rept.,

Corporate Author : ROHM AND HAAS CO HUNTSVILLE AL REDSTONE RESEARCH LABS

Personal Author(s) : Viles, Joe M. ; Wood, William A.

Report Date : SEP 1969

Pagination or Media Count : 35

Abstract : Large-scale experiments have shown that rapid rates of pressure rise leading to the early explosive-mode failures (failures that occur 1/4 to 1/2 sec after ignition) of the Lance propulsion unit do not occur when the fuel and oxidizer gases ignite upon contact. Seventy-three experiments were carried out in 6-in.-diameter, 170-cubic inches-volume and in 14.5-in.-diameter, 1650-cubic inches-volume closed bombs. Fibrous suppressors found to give large reductions of maximum pressure and pressure-rise rates in small (2-in.-diameter, 12.5-cubic inches-volume) closed bombs gave only marginal reductions in these quantities when used in 14.5-in.-diameter bombs. These experiments indicate the coolant pack now used in the Lance propulsion unit to be responsible for early explosive-mode failures. (Author)

Descriptors :   (*SURFACE TO SURFACE MISSILES, SOLID ROCKET PROPELLANTS), (*SOLID ROCKET PROPELLANTS, DETONATIONS), (*EXPLOSIVE GASES, SUPPRESSORS), SYNTHETIC FIBERS, GLASS TEXTILES, GAS GENERATING SYSTEMS, DOUBLE BASE ROCKET PROPELLANTS, REACTION KINETICS, PRESSURE, IGNITION.

Subject Categories : Explosions
      Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE