The Effect of a Case on Airblast Measurements. Part I. Friable Inert Cases
NAVAL ORDNANCE LAB WHITE OAK MD
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The effect of casing mass on the airblast from high explosives was examined experimentally by making shock wave pressure-time measurements with piezoelectric gages in the peak pressure range from 80 to 4 psi on spherical pentolite charges encased in ceramic and plaster shells of mass varying in 12 increments from about 2 to 33 of the explosive filling weight. From the lightest to the heaviest case shock peak pressure changed progressively from about 5 higher to 5 lower than that for a bare charge 7 in equivalent weight terms. The yield reduction is 25 less than that predicted by the Fano formula but in good agreement with Fishers formula based on steel cased data.
- Aerial Bombs