Pomilio, Ottorino · New York, McGraw-Hill · leaf 319
rs there is a distributionof stresses as shown in Table 41. 304 AIRPLANE DESIGN AND CONSTRUCTION Table 41 Upper frontUpper rearLower frontLower rear Effect of vertical trussing CompressionCompressionTensionTension Effect of horizontal tr TensionCompressionTensionCompression s SHr \ ■^^ISSir 5 \ / S… … MAIN PLANES AND CONTROL SURFACES 305 We see then that while there is partial compensation ofstresses in the upper-front and lower-rear spars, in the othertwo spars instead the stresses add to each other. Thespar which is in the worst condition is the upper-rear one,
Airplanes
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