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Influence of design on cost of operating airplanes (1922)
NASA Technical Reports Server (NTRS) · leaf 19
a-Twin engined (840 HPi) Safety factor=4 b-Twin engined (840 HP.) Safety factor=6 c-'ilrin engined (840 HP.) Safety factor=8 d-Single engined (420 HP.) Safety factor=4 e-Single engined (420 HP,) Safety factor~6 f-Single engined (420 HP.) Safety factor=8 Feet climb ir. first min* (sea level) U65 565… … Speed at 5000 ft. in M,P.H. (Series of single and twin liberty engined airplanes, constant minimum speed 57 M.P.H.; duration, 4 nr.; wing loading; 10 lb, per sq.ft. Fig. 6 Variation of net pay load with speed.NASA Technical Reports Server (NTRS)
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