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 69
8,000cubic feet. The envelopewas covered with a net,and a heavy pole, 66 ft. long, was carried below, being suspendedin a horizontal position by means of ropes which connected it tothe net. At the end of this keel, as Giffard called it, the rudderwas placed, which took the form of a triangular… … Fig. 22. -Giffards dirigible balloon, made in1852. THE HISTOEY OF THE DIRIGIBLE BALLOON. 49 in diameter, at the rate of 110 revolutions per minute. The totalweight of the balloon, together with that of one passenger,amounted to H ton, and it was reckoned that, when filled withgas, it could carry \…
Aeronautics
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