Structural analysis and design of airplanes (1920)
United States. Army. Air Corps · [Washington] · leaf 154
ly-wood should, in general, run up nearly flush with the outside of theflanges. For box spars the thickness of the webs will vary from 3/32to 3/16 in. depending on whether the plywood is of hard wood, such asbirch, or of spruce and poplar, and depending also on the size of the spar.For greater…
Airplanes
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