The Bookshelf for boys and girls Book of Wonders and Curious Things (1912)
University Society, New York · New York: University Society · leaf 171
A third sort of model shows the aeroplanemethod of flight, that led to success in makingreal flying-machines. This new method uses flator curved surfaces, sliding quickly upon the air,to support the weight. Scale a card through theair, and it travels upon the air, holding itself upso long as it has… … PAPER AEROPLANE. Then bend it along the line AC into a flat V,putting two pins at B, as near the head as youconveniently can. Now stand on a chair anddrop the bird, and it will come down as if it werea hawk after a chick. The weight of the pinspulls it down, the wings resist by pressure againstthe…
Children's literature · Children's encyclopedias and dictionaries · Literature · Encyclopedias and dictionaries
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