File:The World book - organized knowledge in story and picture (1918) (14764317255).jpg

Identifier: worldbookorganiz04oshe (find matches)
Title: The World book : organized knowledge in story and picture
Year: 1918 (1910s)
Authors: O'Shea, M. V. (Michael Vincent), 1866-1932 Foster, Ellsworth D Locke, George Herbert, 1870-1937
Subjects: Encyclopedias and dictionaries
Publisher: Chicago : Hanson-Roach-Fowler
Contributing Library: Internet Archive
Digitizing Sponsor: Internet Archive

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Text Appearing Before Image:
FLYING MACHINES(a) A British biplane: (h) an all-steel battleplane ; (c) a Blerlot monoplane. against the slanting imder surface of the ma-chine, and if the engines propel the aeroplanefast enough this pressure overcomes the forceof gravity and the machine soars into the air. The Pioneers. Not all men of the nineteenthcentury were like the professor to whom theelder Mr. Wright submitted his question.Those who understood the principle of the kiterealized that flying machines could be madeif engines could be built capable of drivingthem at high speed, and if means could be dis-covered to control their equilibrium and thedirection of their flight. Speed is necessary to an aeroplane becausein general the pressure of the air beneath it isproportionate to the square of the velocity.
Text Appearing After Image:
FLYING MACHINE 2237 FLYING MACHINE and a machine traveling twenty-five miles anhour has only one-fourth the lifting powerof one moving fifty miles an hour. In orderto propel their machines at high speed earlyinventors had to use heavy steam engines andcarry heavy loads of fuel and water. If theydoubled the size of their wings to double theirlifting power, they had to increase the strength,and hence the weight, of their engines. As aresult few of their machines ever left theground. But even had the pioneer students of flyingpossessed the light gasoline engines of to-daythey could not have succeeded without workingout the problems of how to leave the groundand how to preserve the balance of the machinewhile in flight. forty per cent in its weight the aerodromemade a number of successful flights. SeeL.ANGLEY, Samuel Pierpont; Curtlss, GlennHammond. Langley never knew that he had solved theproblem of equilibrium during flight, but hewas the only man who did solve it before theWrights. A F

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