Accession Number : ADP002177

Title :   Lightning Protection Zones for Rocket Launch Complexes,

Corporate Author : LIGHTNING AND TRANSIENTS RESEARCH INST MIAMI BEACH FLA

Personal Author(s) : Murakami,A. ; Pinckney,K. R. ; Robb,J. D.

Report Date : 1983

Pagination or Media Count : 10

Abstract : This paper examines the Rolling Ball Theory of lightning protection zones. It provides support for this theory in terms of the critical gradient time history for lightning rods as described mathematically in terms of a prolate spheroid. The analysis shows how the critical threshold gradient for a sharp object lying below a lightning rod can emit a ground streamer which will move above the lightning rod before the critical gradient is reached on the taller rod. This occurs only if the radius of the lightning rod tip is substantially larger than the radius of objects lying within its zone of protection and this results in defeat of the rod. Also considered is the use of the catenary cable protection system over launch complexes and the need for it. (Author)

Descriptors :   *Lightning, Evolution(General), Theory, Protective equipment, Electrical grounding, Electrodes, Operational effectiveness, Symposia

Distribution Statement : APPROVED FOR PUBLIC RELEASE