Abstract
Tethered aerostat systems of today are complex flexible structures that must operate under extreme environmental conditions and in winds of at least 70 knots. Aerostat life times of ten years are expected while twenty years are desired under continuous around-the-clock opera tion in worldwide weather conditions. Lighter weight vehicles are needed to increase payload capacity. These requirements are placing new demands on the materials engineer to develop materials and materials technology to meet the needs of today. This paper deals primarily with aerostat hull materials. Recent history, the state of the art, and advanced material concepts are covered. In addition, Sheldahl's qualification test program is discussed, including several previously unreported innovations in aerostat material testing.
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