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 200
87 in. thick weighs about 88 lbs. and con-tains 140 cubic feet under a pressure of 120 or 130 atmospheres.A military waggon carries 35 cylinders, and the gas is allowed to BALLOON CONSTRUCTION. ETC. 179 pass into the balloon by opening the valve at the top of thecylinder. When a balloon is to be… … Fig. 106.—Steel cylinder for containing hydrogen. Coal gas is only used for free balloons, and was first proposedby Green in 1818. The lift due to the use of the hydrogenor coal gas has been already studied in an earlier chapter, and itwas there shown that the size of the balloon depends on…
Aeronautics
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