down the pipe. The yield in the 14 Mev peak is about that expected from the initial calculations where a yiel@ taken as the basis for calculation, - TASK UNIT 13 PROGRAMS (DOD) 2.3.1 Program 1, Blast and Shock Measurements The broad objective of Program 1 was to measure and study the blast forces transmitted through the various media of the earth. In the main measurements were obtained in air by means of Wiancko and mechanical self-recording pickups, Those obtained within the water were taken by means of tourmaline, Wiancko, strain gage, and ball crusher pickups. A few earth measurements were made using Wiancko accelerometers. Successful measurements contributing to the fulfillment of the objectives were made by ten out of twelve projects. the two unsuccessful projects, % ae Of one failure was brought about by the coupled with the cancellation of ; tMer project failure was brought about by the scheduled time of firing which imposed unfavorable light conditions for photo- graphy. Many interesting and valuable records were obtained during the shot series, These records were interpreted in the reexamined subsequently at the home laboratories of Ject agencies, The following tentative conclusions liminary data and, therefore, are subject to change ful study of the records, field and will be the various proare based on preupon @ more care- a. The air shock pressure-time traces obtained at close-in Ground ranges were distorted. b. Although distorted air shock wave forms were noted, no Serious peak pressure discrepancies (as compared to the OW Operation Tumbler-Snapper Composite free air pressures) were noted. c. Dynamic air pressures were obtained that were higher than those predicted by the Rankine-Hugormiot relations applied to Sir. The pressure discrepancies were probatly a result of sand end/or water loading of the shock wave. E yes OOD, LANE FO" 35 Lent 2.3 of of 1 Mt was