Aeroplane construction and operation; including notes on aeroplane design and aerodynamic calculation, materials, etc. A comprehensive illustrated manual of instruction for aeroplane constructors, aviators, aero-mechanics, flight officers and students. Adapted either for schools or home study (1918)
Rathbun, John B · Chicago : Stanton and Van Vliet Co. · leaf 376
e as r = 0.036V-. At 90 M. P. H., r = 0.036 x 90X 90 = 291.6 pounds. At 65 M. P. H., the resistance is:0.036 X 65 x 65 = 152.1. At the extreme low speed of 43 M.P.H. we have r=0.036 x 43 x 43 = 66.56 pounds. The totalresistance (R) is equal to the sum of the wing-drag and theparasitic resistance.… … i It POWER 365 66.56^ 277.56 pounds. The horsepower is computed fromH = RV/375e, and at 90 M. P. H. this is : H = 491.6 x 90/375x0.80 = 147.5 H. P. where 0.80 is the assumed propellerefficiency. At 65 M. P. H. the horsepower drops to H ^176.1 X 65/375 x 0.8 = 38.1 H. P., assuming the…
Airplanes
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