Accession Number : ADA309826

Title :   Long Duration Balloon Technology Survey.

Descriptive Note : Final rept. 11 Aug 88-28 Feb 89,

Corporate Author : WINZEN INTERNATIONAL INC SAN ANTONIO TX

Personal Author(s) : Scott, P. G. ; Lew, T. M. ; Wilbeck, J. S. ; Rand, J. L. ; Brezinsky, R. H.

PDF Url : ADA309826

Report Date : 11 MAR 1989

Pagination or Media Count : 65

Abstract : This feasibility study addresses the design and fabrication of a long endurance balloon vehicle capable of supporting 50 pounds at 120,000 feet for up to one year. The concept makes use of the experience gained by the scientific community over the past two decades in flying smaller payloads for long periods of time. The result of the effort is a prototype balloon which has a better lift to weight ratio than previous designs. This was achieved by the use of a novel shape (multiple intersecting spheres) and the use of a material new in the area of ballooning (Emblem , a biaxially oriented Nylon 6). This film demonstrates very high strength without displaying the susceptibility of prior films to pinholing. Other results of the effort are two analytical tools and specialized fabrication techniques. The analytical tools are a heat transfer model for predicting maximum and minimum supertemperatures of the balloon gas, and mechanical model to design the superpressure balloons for particular flight scenarios.

Descriptors :   *BALLOONS, HEAT TRANSFER, SCENARIOS, METHODOLOGY, RATIOS, PAYLOAD, FABRICATION, PROTOTYPES, HIGH PRESSURE, SPHERES, LONG RANGE(TIME), GASES, ENDURANCE(GENERAL), FEASIBILITY STUDIES, FLIGHT, HIGH STRENGTH, MATHEMATICAL ANALYSIS, WEIGHT, LIFT, MECHANICAL COMPONENTS, SCIENTIFIC ORGANIZATIONS.

Subject Categories : Lighter-than-air Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE