Influence of design on cost of operating airplanes (1922)
NASA Technical Reports Server (NTRS) · leaf 21
a-Factor of safety- 8 ® b-Faotor of safety*5 6 -h o) c--Factor of safety-- 4 f … Duration in hours (One 420-HP., Liberty engine; total weight, 6:500Mb.; wing area.., 630 sq.ft.; nigh speed, 108 m.p.h. at 5000 ft,; minimum speed, 57 m«p.h»; 10 lb. per sq.ft.; climb from sea level, 565 ft, in first minute.) Fig. 8 Variation of cost with duration-420-HP Airplane
NASA Technical Reports Server (NTRS)
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