Pomilio, Ottorino · New York, McGraw-Hill · leaf 325
ord, spruce and poplar. In Table 42 all the preceding data for the sections of thespars most stressed has been collected. In this tableFi^ = stress due to vertical trussings.Pj) = stress due to horizontal trussings.Py = Pi, + P^ = total stress due to both trussings.For these stresses the — sign has… … o o o O O oo o o 9 o o MAIN PLANES AND CONTROL SURFACES 311 I = moment of inertia of the section. Z = section modulus. M = bending moment due to air pressure. M .Jm^Y unit stress due to this bending moment. A = maximum deflexion of the span.Pr = moment due to compression stress P^. TO V A /^ =…
Airplanes
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