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NARA·NARA_AirIntel_17618564·tiff_group·—·1 pages
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flights are now being carried on GT balloons, Some 75 balloon flights have been made to date with no catastrophic failures in flight. These balloons have not been found to be sensitive to ascent rates, dynamic launches, high shears, or low temperature environments, Balloons built of these materials have carried payloads up to 11, 000 pounds and gross system weights of 13, 500 pounds, In the case of the Stratoscope II balloon system (Figure 3) the top balloon not only carries the gross system of 13, 500 pounds but also experiences an additional stress due to the superpressuring of the top ballo…
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