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Belgian Stratosphere Balloon Experiment

Naturevolume 140page54 (1937) | Download Citation



THE most difficult part of the planning of a large stratospheric balloon is how to control the rate of descent in the upper atmosphere. If a balloon is large enough to reach about 19 miles (1/100 atmosphere) the hydrogen must contract during the descent, and the bag will be only 10 per cent filled at 10 miles: it is then difficult to avoid a dangerous flapping of the bag, except by controlling the speed by a continuous dropping of ballast ; incidentally, the weight of that extra ballast would have reduced the maximum altitude reached.


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