Experimental engineering and manual for testing (1903)
Carpenter, Rolla C. (Rolla Clinton), 1852-1919 · New York, J. Wiley & sons; [etc., etc.] · leaf 213
the delivered force by Q, § i86.] MEASUREMENT OF POWER. 223 the radius KM by a, KE by r, LF by r,, iVZ by b, the forcedelivered at E by i?, that at F by i?,.We shall have But and since Rr = Pa, also i?,r, = Qb. R{ED) = RiFD)i ED = FD,R = R,. The resultant force Z=R-\-R, = 2R..\R = iZ, P=iZr-^ai Q =… … Fig, gji.—Hachettes Steelyard-dynamometer. Co7isideration of Friction.—The friction of the axle andgear-teeth will increase the force R and decrease the force R^,Let fi be the experimental coefficient expressing this friction.Then P^\{}-\-}x)Zr-^a\Q = i{i-M)Zr,^b; _ Par, — Qbr^~ Par,-\-Qbr 224…
Building materials · Machinery
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