Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 266
nce. The usual method of allowing for it is to consider thatthere is a certain amount ofresistance per ton per degreeof curvature, say 0.7 pound.The number of degrees ofcurvature is the angle be-tween two radii of the curvedrawn at the ends of a chord100 feet in length. In termsof the radius r, the… … Fig. 129. Graphical Determination of TrackCurvature 100 feet? As explained above, sine of ^ the angle=^^ = | From the table of sines w^e find that this is the sine of 30°. The angle ofcurvature is, therefore, 60°. (b) What additional resistance is caused by this curvature? 7^=0.7X60=42 pounds per…
Electrical engineering
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
