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Page 4 - How to Make Alexander Graham Bell's Winged-Cell Tetrahedron Kite

Published by Ronald Caplan on 1973/7/1 (1405 reads)
 

these struts added both weight and resistance to the wand. So Bell made a triangular kite on the general model oi the box kite. See drawing. "A triangle is by its very nature perfectly braced in its own plane, and in a triangular-celled kite...internal bracing of any character is unnecessary....The lifting power of such a triangular cell is probably less than that of a rectangle, but the enormous gain in structural strength, together with the reduction of head resistance and weight due to the om- mission of internal bracing, counterbalances any possible deficiency in this res? pect. The horizontal surfaces are those that resist descent under the influence of gravity, and the vertical surfaces prevent it from turning over in the air." 7' l-CeU- 5?(rC6T6N) -n?TR.ftrtec'/26'> STdOrs AOia.'/ f ieGt>s /Oo THcr fto-K yiire- / sxrre/i' P'civiCiPar ' ' sRAciOcs- i'c>oe>UAiG- Tif'e LoiOo-jraoiN/AL stiO v'l'oO I 6P ComPoUNJb Kltzf 6A>DVi • a) "Triangular cells also are admirably adapted for combination into a compound struc? ture, in which the aeroplane surfaces do not interfere with one another. For exam? ple, three triangular cells tied together at the corners, form a compound cellular kite which flies perfectly well." (See drawings.) This is not simply a bigger or more complex kite; it overcomes the problem of added stability without additional weight in respect to the amount of surface available to the wind. "The weight of the compound kite is the sum of the three kites of which it is composed, and the St. Ann's Motel Restaurant --t ' General Store & Camping Supplies Q Hwy. 105 GAELIC coi.LeaE| 5 X Fully Licensed Visit Our Marine Aquarium Displaying Our native Fish Cape Breton's Magazine/4
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