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 113
d direction, but flies in such a manneras to bring the tips of the wings towards the front. The tips of 92 AIESHIPS PAST AND PEESENT. the wings do not move as shown at A, but as shown at B. Asthe bird flies forward, it does not drive the air from under itsbody, but throws it, from the side and from… … Fig. 48.—Stentzels flying machine. in exactly the same way as a fish is propelled by the movementof its tail. There was at any rate a better prospect of success as soon as itwas proposed to use some form of engine as the motive power.Two attempts on these lines deserve mention. An engineer,named…
Aeronautics
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