A Study of Thermal Initiation, Cookoff, of M30 Propellants
| Autor: | Joseph J Rocchio, Robert A Wires |
|---|---|
| Rok vydání: | 1978 |
| Předmět: | |
| DOI: | 10.21236/ada057758 |
| Popis: | A study has been made of the thermal stability of the triple-base propellant M30. The apparatus employed applies the test specimen for a controlled time interval to a heated copper block with a force adequate to maintain good thermal contact. A GO-NO GO test procedure was followed over the temperature range 200 to 260 C. A lower contact time limit was observed below which ignition never occurred. A high contact time limit was also observed above which ignition always occurred. Between these limits, which become narrower with increasing temperature, ignition was variably observed. Contact geometry and contact pressure were also studied. The latter was found to have a significant effect on time to ignition of a single grain with the time to ignition and the variability of observation increasing as contact pressure was decreased. The variation in time to cookoff with temperature was found to follow an Arrhenius relationship. The high limit data gave A = 5.5 x 10 to the 16th power and E = 39.8 kcal/mole. The low limit data gave A = 9.8 x 10 to the 15th power and E = 37.8 kcal/mole. These relationships give a reasonably good match to experimental cartridge case cookoff data. |
| Databáze: | OpenAIRE |
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