The Torsion of Members Having Sections Common in Aircraft Construction (1930)
NASA Technical Reports Server (NTRS) · leaf 24
. Beams with the circle, the square, the ellipse, and the equilateral triangle as bounding curves of the cross sections were cut from the same plank. The dimensions and the angle of twist for a given torque as determined by test were substituted in the rigorous formula previously given for the… … 15 20 25 30 35 40 45 0 5 10 Moisture, per cent Figure 8.—Relation between torsional properties and moisture content of Sitka spruce a wide range in specific-gravity values. Consequently the first two (Table III) are below the minimum specific gravity (0.36) allowable in aircraft construction. Table…
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