Application of a Mathematical Flame Spread Model to Performance Problems in the 81 mm Mortar.
Final rept. Oct 73-Oct 74,
CALSPAN CORP BUFFALO N Y
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A new design of 81 and 60mm mortars incorporating horseshoe-shaped propellant increments has experienced fin failure problems. In addition, muzzle velocity variability was somewhat higher than that of the items currently in use. The subject program represents a coordinated analyticalexperimental attempt to identify the causes of these problems and to recommend corrective measures. The existing Calspan Mortar Code was modified to suit the basic configuration of the new design. Full scale firings, open air igniter tests, and closed bomb tests were conducted to explore interactions between some of the many components and to provide empirical information for use in the code. Finally the code was used in an extensive parameter variation study in order to represent analytically the fin failure and velocity variability phenomena, and then to provide adjustments to certain parameters to alleviate the problem.
- Ammunition and Explosives