Pomilio, Ottorino · New York, McGraw-Hill · leaf 293
other; in general the lower wing carriesless than the upper one; usually in practice the load perunit length of lower wing is assumed equal to 0.9 of that 278 AIRPLANE DESIGN AND CONSTRUCTION of the upper wing. Then evidently the load per linear inchof the upper wing is given by2130320.48 + 0.9 X… … 029 I =18.85 In. ^S§^ ZiSS - 0.43 L ^M ^ Fig. 166. applied in a directly opposite direction to the air reaction,decreases the value of the reaction. In our case the figuredweight of the wdng truss is 276 lb.; thus the weight perlinear inch to be subtracted from the preceding values willbe 0.45 lb.…
Airplanes
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