Structural analysis and design of airplanes (1920)
United States. Army. Air Corps · [Washington] · leaf 160
rcomes the objection to vertical bolt holes in the spar itself. 108. Pin Plates—In many cases it is possible to save weight in themetal fittings by using thinner material and brazing a pin plate to thefitting at the bolt hole in order to reduce the bearing stress. An examplewill illustrate the… … tVroppec/ Fitt~/n<p CW9 Fig. 92. Lug with Pin Plate Ultimate shearing strength = 45,000 lbs. per sq. in.Ultimate tensile strength = 60,000 lbs. per sq. in.Ultimate bearing strength = 100,000 lbs. per sq. in. The ultimate pull on fitting = 840 X 5 = 4200 lbs. per sq. in. 4200 Tensile stress on…
Airplanes
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