United States. Navy Department. Bureau of Construction and Repair · Washington, Govt. print. off. · leaf 338
would be regarded as such. The necessity for exercising care in sanding the faces of a panel is obvious, inasmuch as different thicknesses on the faces would introduce unequal forces with changing moisture content. In order to obtain symmetry, it is also necessary that both faces or symmetrical… … Fig. 29. —(a) Cupping resulting from] unsymmetetrical construction in plywood, (b) Twisting resulting from ply- wood construction with grain of faces at 45 degrees with grain of core. plies should be so arranged that for any ply of a particular thickness there is a parallel ply of the same…
Airplanes · Airships · Aerodynamics
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