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 28
gaveproof of a very accurate knowledge of the laws of air-resistance.In order to sustain the weight of a man, he calculated that anexposed surface of 130 square feet would be sufficient, and thisis indeed a wonderfully good approximation to the truth. Hesuggested that serious accidents would… … Fig. 5.—Meerweirfs flying machine. FromMoedebecks Pocket Book for Balloonists. 8 AIBSHIPS PAST AND PEE SENT. something has been done in this way. Zeppelin on the Bodenseeand Langley on the Potomac have helped to lessen the dangerattaching to experimental work of this kind. It may be of interest to…
Aeronautics
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