The Attainment of Recoilless Rifle Blast Reduction - A SEAS Status Report.
WATERVLIET ARSENAL N Y
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Back blast overpressure measurements from firings of seventy 105mm RR inert rounds have been examined and compared to predictions by point source blast correlations and by time-dependent gas dynamic codes. The effect of porous shroud and parallel plate deflectors is shown for some full-scale tests. That of a sixty-staged, capacitative multinozzle, 17 subscale cluster, is shown to significantly reduce back blast. Some detonative properties of the incident blast wave are considered, and a thermochemical analysis is given for a dense M-8 gas, performed under contract to obtain charged species and OH concentrations. It is concluded that capacitative-dissipative devices may be superior to the purely dissipative type of fluid mechanical blast attenuator, but that propellant and loading considerations play an important role in blast reduction. Author