ABSTRACT
Mie’ primary objective of Project 1.8 was to evaluate dynamic
pressure as a damage parameter.
In addition an attempt was made to
determine the damage effect of the long positive phase duration.
A total of 27 1/4-ton trucks were exposed in Shcts 3 and 6 of
Operation CASTLE. The ground ranges were selected to obtain dynamic
pressures comparable to those acting upon jeeps experiencing light to
severe damage on Shot 10 of Operation UPSHOT-KNOTHOLF.
The yield value realized on Shot 3 waa too low to give any significant results. For each degree of damage sustained by the jeeps in
Shot 6 dynamic pressures were recorded which are related to meagured
overpressure by use of the Rankine-Hugoniot equation. The damage
results of Shot 6, CASTLE, compere favorably with that of Shot 10,
UPSHOT-KNOTHOLE.
Although valuable data were obtained in Operation
CASTLE, it was not enough to.conduct a meaningful enalysis of the
effect of the long positive phase on damage.
The data obtained from-Operation CASTLE were sufficient to
evaluate dynamic pressure as a damage parameter and also to determine
the magnitude of dynamic pressures required for specific damage to
1/4-ton trucks for the set of cénditions as realized in Operation
CASTLE. For reasonable estimates of ground range yr damage to jeeps
where W is the
for various weapon yields the scaling ican be as we
yield cf weapon.