Figs. 1,2,3,4,5,6 N.A.C.A. Technical Memorandum No. 782 with servo-rudder Figure 2.- Wing section .Strut Figure 3.- Critical fonn of oscillation of the He 8 at 550/m in. scale of wing contour 1:60 Figure 4.- Dangerous oscillation of L 78 at 860/min, scale 1:80 … Figure 5.- Dangerous oscillation of He 46c at 815/min, of He 60 780/min, scale 1:60 scale 1:80
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