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 132
a steady wind blowsthe whole year round. FLYING MACHINES. Ill They first directed their attention to three points : (1) whetherit is better to let the driver stand or lie down; (2) whetherstability is better ensured by special steering devices or byshifting the position of the centre of gravity;… … Fig. 64.—Aeroplane in flight.(From the Leipziger Illustrierte Zeitung.) After any necessary changes had been made and a certainmodicum of stability seemed assured, one of the brothers laidhimself at full length in the machine. The work then continuedin the same keen and determined way ; neither the…
Aeronautics
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