. Official proceedings . />-inch below the tread and also center of the plate intersectionand at the hub. The tread metal, of course, heats up ver\ muchmore rapidly than the metal in the ])late because the conductionof heat through chilled iron is relatively slow. The dififerenccsin temperature between these two points at intervals of a fewthousand revolutions are plotted, the result being shown inTigure 10 \Z 1+ le 16 ZO £2 2^ 26 28 30 3E 3^ 36 38THOUSANDS OF REVOLUTIONS. Fig. 34—Difterences in Temperature Between the Tread and Plate of a 625 Lb. Wheel at Various Sneeds and Distances
. Official proceedings . />-inch below the tread and also center of the plate intersectionand at the hub. The tread metal, of course, heats up ver\ muchmore rapidly than the metal in the ])late because the conductionof heat through chilled iron is relatively slow. The dififerenccsin temperature between these two points at intervals of a fewthousand revolutions are plotted, the result being shown inTigure 10 \Z 1+ le 16 ZO £2 2^ 26 28 30 3E 3^ 36 38THOUSANDS OF REVOLUTIONS. Fig. 34—Difterences in Temperature Between the Tread and Plate of a 625 Lb. Wheel at Various Sneeds and Distances of Travel Resulting From a Brake Shoe Pressure of 1500 Lbs. per Wheel The tlilTerence in temjxrature for doing the same amountof work is very much greater in the higlier s])eeds than in thelower speeds. After a run of 20 miles at 5 miles per liour, aconstant dititerence of 150^ of heat in temperature between treadand intersection was maintained because the amount of radiation 266 hecanio equal to tlie input, whereas at 50 M. 1. II. the differ-ence in temperature was 420°, a constant difference was readiedafter about 35 miles of tra\el. In addition to determining; the temperature difference, thedeformation of the metal in the face and back of the wheel atvarious in!rr\als was determined with a lierry strain i^aui^e, andl)y to these readings after making correction for ex-j)ansion due ti» t
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Keywords: ., bookauthorrailwayc, bookcentury1900, bookdecade1900, bookyear1901
