. Report of the Electric Railway Test Commission to the president of the Louisiana Purchase Exposition . aphically in Figs. 142, 143, 144, and curves have been plotted in the same general manner aswere those of Figs. 138, 139, 140, and 141. In all cases the cur-rent values have been taken as abscissas. Fig. 142 shows thepressure drop per mile of track for various currents at givenfrequencies. Fig. 143 shows the power losses per mile. Fig. 144shows the ratio of to pressure drop, and Fig. 145 showsthe power factor. ALTERNATING CURRENT LOSSES IN TRACK 447 Test No. 48. Sixgle T
. Report of the Electric Railway Test Commission to the president of the Louisiana Purchase Exposition . aphically in Figs. 142, 143, 144, and curves have been plotted in the same general manner aswere those of Figs. 138, 139, 140, and 141. In all cases the cur-rent values have been taken as abscissas. Fig. 142 shows thepressure drop per mile of track for various currents at givenfrequencies. Fig. 143 shows the power losses per mile. Fig. 144shows the ratio of to pressure drop, and Fig. 145 showsthe power factor. ALTERNATING CURRENT LOSSES IN TRACK 447 Test No. 48. Sixgle Track and Single Trolley.—Thedata representing the investigations on a single track and singletrolley are showii graphically in Figs. 146, 147, 148, and cm-ves have been constructed in the same general manneras that employed in the construction of the curves of Figs. 138, 2ii1. (^ A an u qn •HP y / soo B 40 /• a- -D 15 4. </ E 0 • / / / B 200 / / /I / G- MO / / y / / /I y D- 100 / y y ^ ^ / / ^ ^ 50 y / •. ^ -^ y -2 -E «( 4 ^ ^- —1 — — ) i( H) 2( X) 3( M) 4( K) 5 OO 6 WA. Fig. 150. — Variation of Pressure Drop perMile with Total Amperes. Single TrackAlone. 600Amperes Fig. 151. — Variation of Pressure Lost per Mileof Track with Total Current. Single TrackAlone.
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