Annual report - National Advisory Committee for Aeronautics (1915)
United States. National Advisory Committee for Aeronautics · Washington, U.S. Govt. Print. Off · leaf 74
rative calcula¬ the spar webs form two sides of the torsion box. This tions on wings with constant-section spars indicate method was used by Friedrichs and von Karman that- it is always conservative in the practical range oi (reference 2) for calculating a duralumin test wing stiffness ratios. with… … 0 5 3 Siotion Root Tip Figure 18. — Relief moments in XII B-3 wing frame calculated by three methods. Figure 19.— Bending moments in XII B-3 wing frame. there is a discrepancy in the total deflections that on the Friedrichs-von Karman results. By an inte¬ gration of the resulting M/EI curve, the…
Aeronautics · Aeronautics, Military · United States. National Advisory Committee for Aeronautics · Aeronautics -- United States -- Periodicals · Aeronautics, Military -- United States -- Periodicals
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