Free-field pressures, station zero
Free-field pressures as a function of time were measured at eight positions above the Wigwam weapon at distances from the charge varying from 800 to 1975 ft. Tourmaline PE gauges were used. Signals were either telemetered to a remote re ceiving location or were recorded in place on a magnetic-tape recorder that was recovered after the shot. The variation of maximum observed pressure in pounds per square inch with distance in feet from the weapon in this range is given by the expression P(max) 2.03 x 10 to the 7th power/R to the 1.16th power. Impulse, at loca tions not affected by surface cutoff, is given by the expression I 3.36 x 10,000/R to the .77th power where I is in pound seconds per square inch. Energy flux density, at locations not affected by surface cutoff, is given by the expression E 3.81 x 10 to the 10th power/R to the 1.87th power where E is in inch pounds per square inch. The fiducial pulse was recorded at 12.5 = 1 msec be fore weapon detonation. The shock wave arrived at the water surface 385.5 msec after the fidu cial pulse. The equivalent weight of TNT required to produce the same peak pressures as the Wigwam weapon at 2000 ft was 4.05 x 10 to the 7th power lb.
- Research Organization:
- Naval Research Lab., Washington, DC (USA)
- OSTI ID:
- 6425501
- Report Number(s):
- AD-339495
- Country of Publication:
- United States
- Language:
- English
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