131 
where 
g(f) = sinf - - sina - Ry # | 
0, 
-1l_, =1 
yt = tan ~& + cos y 
(1 +a a) sin @R,/o,) 
Oe: Keates cos (R/C) FwO sin WH, /C,) 
It will be noted that in order to calculate the damage it is necessary to 
know that the pressure—time curve falls off exponentially at least as far 
out as the time of action of the gauge, and to have the maximum pressure 
and the time constant, which are usually obtained from piezoelectric data. 
(ad) Weight and distance exponents. -- For 0.085—in. ae diaphragms, 
the distance exponent is 1.2, and the weight exponent Op 
9. The Naval Ordnance Laboratory ball—crusher gauge 
The NOL ball-crusher gauge [6] has been used on all RELIANCE shots. 
Various sizes of copper spheres were employed in the gauge and the gauge 
was mounted in various tynes of blocks and orientations. / 
8 SeCe 5(b). 
— See 
2 eeeuShels13 (c)e 
