—_—_—1 Project 1,2 ~- SURFACE PLAST MEASURHYENTS OF STATIC AND DYMAMIC PRESSURSS = A. D. Thornbreugh Carter D, Zroyles This experinent was designed to neesure overpressure and dynauic pressure vs time fran a surface burst of a medium yield (40 KT) nuclear explosion, Cvyerpressures wore measured with gages in ground baffles end pitot-static tubes, Dynamic pressures were measured with the pitot- static tube mounted 3 feet above the ground surface, The overpressures and dynenic pressures are in general agreenent vith picwious picsurccomts of a 1 KT and of negaton Lursts, being con- “* etsteant with v3 scaling snd a reflection factor of 1,6 using a free~ macuat Ag ctar Neg ip soplertses Aistence curve, 4 a ooat ewowild Se * eee afcips at However, a precursor of 2.8 Jinited e-tent rsore extensive. The Gstalled cesults are given in the tables and graphs. -17-