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ABSTRACT
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Operation CASTLE presented an opportunity to obtain e-wealthof.
in air pressure data in high and low pressure regions from surface bursts
of high-yield weapons.
Air-pressure measurements using self-contained, flash-initiated
" gages were successful. Overpressure data were obtained up to pressure
levels of 250 psi.
;af Dynamic pressure measurements using newly developed self-recording
"q" .gages were successful. Measurements were obtained over a dynamic
pressure range of 0.47 to 135 pai.
Shot3 produced the only anoms:
omstous results.
of press
Two distinct curves
lel versus distance were obtained from the tw blast lines
instrum ted. The blast lines were approximately 180° apart, one being
located /dnithe Tare Complex and the other on Site Uncle. The pressures
obtained on the, Tare Complex line were as much as 20 percent lower than
the pressures ‘at™comparable distances on Uncle.
Evidence exists which
seems to indi
that a heavy rainstorm was localized over the Tare
Complex at zeretime, It would seem possible that a significant reauction in pressure oan result when the shock wave passes through an
area in which preci
The validity o
tion is occurring.
scaling law for yields as great as 15 MP
appears to have bee
stantiated,
e dynamic pressures, gbtained are apparently in agreement with
theoretical values,
When the overpressureg/obtained on all shots were scaled to 1 KT
at sea level and plotted,
@/1.6 KT free air curve appeared to be the
best fit.
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