Abstract
Determinations of the velocity of detonation of unconfined columns of pressed tetryl pellets, made by me in these laboratories in 1941 by means of the Buxton rotating-mirror camera1, showed that the velocity was higher by several hundreds of metres per second when there was a continuous cylindrical cavity in the column. For example, whereas the velocity of detonation in a cylinder of tetryl, 7/8 in. in diameter and of density 1.44, was 6,875 m./sec., the velocity in a cylinder of the same diameter but containing an axial cavity ¼ in. in diameter was 7,780 m./sec. Later experiments confirming and extending this result were made here by Dr. W. B. Cybulski with the same camera, after he had introduced modifications which considerably improved its accuracy.
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References
Payman, Shepherd and Woodhead, Safety in Mines Research Board Paper, No. 99 (1937).
Munroe, Amer. J. Sci., 36, 48 (1888).
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WOODHEAD, D. Velocity of Detonation of a Tubular Charge of Explosive. Nature 160, 644 (1947). https://doi.org/10.1038/160644a0
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DOI: https://doi.org/10.1038/160644a0
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