The dynamics of mechanical flight; lectures delivered at the Imperial college of science and technology, March, 1910 and 1911 (1912)
Greenhill, G. (George), Sir, 1847-1927 · London, Constable & Company Ltd. · leaf 125
116 THE DYNAMICS OF MECHANICAL FLIGHT In the non-rigid air shij) the cyhndrical envelope forms one continuous gas bag, and this must be kept constantly inflated. If this should become partially deflated, like an ordinary spherical balloon, the indentation would affect the stability as it runs from… … Fig. 58. A ballonet is required, and this is an interior bag which can be inflated by an air-pump to fill up the space left vacant by the escape of the hydrogen through the appendix in the ascent, and to keep the balloon distended during the descent, and on the ground, in spite of gas leakage. One…
Aerodynamics · Aeronautics
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