Accession Number : ADA034847


Title :   Atmospheric Electricity and Tethered Aerostats, Volume 1


Descriptive Note : Final rept. 1 Apr 1973-30 Jun 1974


Corporate Author : AIR FORCE EASTERN TEST RANGE PATRICK AFB FL


Personal Author(s) : Hall, Toxey A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a034847.pdf


Report Date : 11 May 1976


Pagination or Media Count : 255


Abstract : The program was conducted for the purpose of determining interaction of tethered balloon systems with atmospheric electricity (particularly lightning) and identifying feasible protective systems. After a brief introductory section math models of effects of tethered balloons on surrounding electrical field are presented. These models are then compared with measurements taken during extensive flight testing. Effects of both well-conducting and poorly-conducting tethers are shown. Section 3 presents a statistical approach to the prediction of lightning strikes to tethered balloons. Section 4 describes results of an extensive series of tests wherein balloon tethered samples, both wire rope and synthetic fiber, are exposed to simulated lightning currents. Section 5 defines systems and techniques for hardening balloon and support equipment and protection of operating personnel. Section 6 and 7 present conclusions and recommendations oriented toward tether materials, grounding and shielding systems, warning devices, and operational concepts.


Descriptors :   *ATMOSPHERIC ELECTRICITY , *LIGHTNING , *BALLOONS , PREDICTIONS , INTERACTIONS , FORTRAN , SAFETY , PROTECTION , WARNING SYSTEMS , TETHERING , LIGHTNING ARRESTERS , HAZARDS , ELECTRICAL GROUNDING , COMPUTER PROGRAMS , MATHEMATICAL MODELS


Subject Categories : Lighter-than-air Aircraft
      Atmospheric Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE