Pomilio, Ottorino · New York, McGraw-Hill · leaf 303
these are inversely proportional tothe product E X I, the elastic modulus by the moment ofinertia, and consequently they vary from spar to spar.But we shall return to this in speaking of the unit stressesin spars. (5) Knowing the reactions upon the supports, it is possi-ble to calculate the… … Fig. 177. The vertical trussing is composed of two spars, one above,and the other below, connected by struts capable of resist-ing compression, by bracings called diagonals, which mustresist tension, and by bracings called counter diagonalswhich serve to stiffen the structure (Fig. 177). In…
Airplanes
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