Encapsulated Liquid Monopropellant Ammunition Demonstration
Final rept. Aug 1969-Jun 1970
MORTON THIOKOL INC BRIGHAM CITY UT WASATCH OPERATIONS
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Ammunition containing bulk loaded liquid monopropellant has the desirable characteristics of low flame temperature, high energy, reduced smoke and flash, and reduced fouling and longer barrel life. However, liquid monopropellants do not burn stably under the conditions existing in bulk loaded cartridges. High and erratic pressures are accompanied by high frequency, high amplitude pressure excursions. Extensive experimentation has not solved this problem. The results of this study showed that the problems of bulk loaded monopropellant can be overcome by encapsulation of the monopropellant into small spheres. Test firings in 7.62 mm NATO cartridges demonstrated good repeatability, and standard velocities were obtained while using polyethylene glycol gels of encapsulated alkyl nitrates plus ammonium nitrate.
- Ammunition and Explosives