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 115
weight of this motortogether with the necessary supply of water is 1 cwt. At the backof the drivers stand is placed a vertical rudder. The preliminarytrials are said to have been successful and each of the lifting pro-pellers was found to be able to raise a weight of 200 lbs.; the totallift was… … Fig. 49.—Dufaux flying machine withpropellers. FLYING MACHINES. 95 driver, besides about 30 lbs. of cargo. He used no sails, andthis would add greatly to the danger of an accident caused bystoppage of the motor. In such a case he would scarcely get offso easily as he has done in the past. No doubt…
Aeronautics
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