tt le che he ee et oe yowoc mr De ——_—- ae ee eae ee awe ee eee ee —--- yoo ee oe Country of Origin: United States Country of Publication: United States Abstract: The primary objective of this Project was to obtain measured-energy input and aircraft-response data on an instrumented B-52 aircraft when subjected to the thermal, blast, and gust effects of a nuclear explosion. To accomplish this, analysis was used in selecting the spatial location for the B-52, relative to a detonation, that would result in the desired aircraft inputs and responses. The B-52 was extensively instrumented with the major portion of the instrumentation devoted to measuring aircraft responses. The B-52 participated in nine shots, including one shot which the aircraft aborted just prior to time zero because of Bombing Navigation System difficulties. The reliability of the instrumentation system was between 95% and 100% throughout the test program. Major Descriptors: *AIRCRAFT -- BLAST EFFECTS; *AIRCRAFT -- THERMAL DEGRADATION; *NUCLEAR EXPLOSIONS -- BLAST EFFECTS; *REDWING PROJECT Descriptors: NAVIGATION; RELIABILITY; SPATIAL DISTRIBUTION Broader Terms: DISTRIBUTION; EXPLOSIONS Subject Categories: 450202* -- Explosions & Explosives -- Nuclear -Weaponry -- (-15989) 10/5/543 (Item 243 from file: 103) 01877527 ERA-12-005062; EDB-87-005160 Author(s): Cowan, M.; Munro, D.N.; Sander, H.H. Title: Test results from automatic yield indicators Corporate Source: Sandia Corp., Albuquerque, NM (USA) Publication Date: Oct 1960 p 44 Report Number(s): AD-611246/0/XAB Note: Rept. on Operation HARDTACK, Apr-Oct 58. Available only for reference use at DDC Field Services. Copy is not available for public sale.; Distribution limitation now removed Document Type: Report Language: English Journal Announcement: EDB&611 Availability: NTIS, PC A03/MF AOQ1. Subfile: ERA (Energy Research Abstracts). GRA (NTIS NTS) Country of Origin: United States Country of Publication: United States Abstract: Automatic yield indicators which operate on the negative-phase duration principle were developed. Yield estimates were obtained during Hardtack Phase I for five detonations at distances ranging from 11 to 25 miles. The greatest error in yield was obtained at 22.5 miles where the ratio of indicated yield to actual yield was about 2.5. For a lapse condition, it is estimated that automatic yield indicators will nearly always indicate within a factor of 2 or 3 of the actual yield within the range to 0.1 psi peak overpressure (about 30 miles for 1 mt). Under strong low-level temperature inversions (rapid increase in temperature with increase in height above the surface) at Nevada Test Site, automatic yield indicators functioned properly on 11 shots on Operation Hardtack, Phase II. Yields ranged from 0.62 ton to 6.5 kt and distances ranged from 2 to 13 miles. On eight of these events, indicated yields were within a factor of 2 of actual yields. Greater errors on the three other events were caused by interference effects resulting from the inversion conditions. This and other blast-wave measurements indicate that factor-of-2 yield estimates can be obtained by the AYI about 70% of the time under strong inversion conditions within the range of 0.1 psi. Major Descriptors: *HARDTACK PROJECT; *NUCLEAR EXPLOSIONS -~ YIELDS Descriptors: AUTOMATION; ERRORS; PORTABLE EQUIPMENT; SHOCK WAVES Broader Terms: EQUIPMENT; EXPLOSIONS; NUCLEAR EXPLOSIONS Subject Categobies: Weaponry -- 10/5/544 450202* (-1989) -- Explosions & Explosives -- Nuclear -- (Item 244 from file: J003810 103)