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Image from page 237 of “Animal locomotion or walking, swimming, and flying : with a dissertation on aëronautics” (1873)
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Title: Animal locomotion or walking, swimming, and flying : with a dissertation on aëronautics
Year: 1873 (1870s)
Authors: Pettigrew, James Bell, 1834-1908
Subjects: Animal locomotion Physiology Aeronautics
Publisher: London : Henry S. King & Co.
Contributing Library: Yale University, Cushing/Whitney Medical Library
Digitizing Sponsor: Open Knowledge Commons and Yale University, Cushing/Whitney Medical Library
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Text Appearing Before Image:
its front. . . . The machine,fully prepared for flight, was started from the top of aninclined plane, in descending which it attained a velocitynecessary to sustain it in its further progress. That velocitywould be gradually destroyed by the resistance of the air toforward flight; it was, therefore, the office of the steam- 212 AERONAUTICS. engine and the vanes it actuated simply to repair the loss ofvelocity; it was made therefore only of the power and weightnecessary for that small effect (fig. 109). The editor of New-tons Journal of Arts and Science speaks of it thus :— Theapparatus consists of a car containing the goods, passengers,engines, fuel, etc., to which a rectangular frame, made ofwood or bamboo cane, and covered with canvas or oiled silk,is attached. This frame extends on either side of the car ina similar manner to the outstretched wings of a bird; butwith this difference, that the frame is immovable. Behindthe wings are two vertical fan wheels, furnished with oblique
Text Appearing After Image:
Fig. 109.—Mr. Hensons Flying Machine. vanes, which are intended to propel the apparatus throughthe air. The rainbow-like circular wheels are the propellers,answering to the wheels of a steam-boat, and acting upon theair after the manner of a windmill. These wheels receivemotion from bands and pulleys from a steam or other enginecontained in the car. To an axis at the stern of the car atriangular frame is attached, resembling the tail of a bird,which is also covered with canvas or oiled silk. This maybe expanded or contracted at pleasure, and is moved up anddown for the purpose of causing the machine to ascend ordescend. Beneath the tail is a rudder for directing thecourse of the machine to the right or to the left; and tofacilitate the steering* a sail is stretched between two mastswhich rise from the car. The amount of canvas or oiled silknecessary for buoying up the machine is stated to be equalto one square foot for each half pound of weight. AERONAUTICS. 213 Wenham1 has advocate
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