Airships past and present, together with chapters on the use of balloons in connection with meteorology, photography and the carrier pigeon (1908)
Hildebrandt, A. (Alfred), b. 1870, Story, W. H. tr · New York, D. Van Nostrand company · leaf 61
ws underlying the movementsof balloons. If a balloon, filled with gas, floats in the air, all itsparts will move with the breeze, and at the same speed. A sailwould therefore hang just as limply as it would do in a completecalm. It would be different if it were possible to give the balloona smaller… … Fig-. 19.—Balloon with sail, and with guide-rope fastened to the rinj intended, with the help of the friction caused by a number ofropes dragged along the ground, to cause the balloon to go ratherslower than the wind. A sail was then to be hung out, and DEVELOPMENT OF THE DIRIGIBLE BALLOON. 41…
Aeronautics
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