. The Street railway journal . are driven by belts. Theframe of the engine is massive, and is designed so thatthe compressive stress does not exceed 400 lbs. per sq. maximum stress on other parts of the engine whenworking at 8000 hp with 150 lbs. steam-gage pressureand 30 lbs absolute receiver pressure are as follows: high-pressure cylinder, 1320 lbs.; low-pressure cylinder, 310ll)s.; high-pressure piston, 2500 lbs.; low-pressure piston. 13 lbs. of steam per ihp per hour when developing 8000lip with steam of 150-lbs. gage pressure, 26 ins. vacuumand 75 r. p. m. The calculated weights on
. The Street railway journal . are driven by belts. Theframe of the engine is massive, and is designed so thatthe compressive stress does not exceed 400 lbs. per sq. maximum stress on other parts of the engine whenworking at 8000 hp with 150 lbs. steam-gage pressureand 30 lbs absolute receiver pressure are as follows: high-pressure cylinder, 1320 lbs.; low-pressure cylinder, 310ll)s.; high-pressure piston, 2500 lbs.; low-pressure piston. 13 lbs. of steam per ihp per hour when developing 8000lip with steam of 150-lbs. gage pressure, 26 ins. vacuumand 75 r. p. m. The calculated weights on the main bearings are: shaft,65,000 lbs.; revolving part of alternator, 332,000 lbs.; twocranks, 42,000 lbs.; total, 439,000 lbs., or 107 lbs. per of projected area of the shaft journals. The rubbingspeed is 607 ft. per minute. The revolving field of thealternator is 32 ft. diameter. The distribution of materialis such that its fly-wheel effect is equivalent to a weight of Coal Conveyors 0 5 10 15 50 25loBll I I l_J—. ll!;ilMll;!^^:i:-l:l:!:!:--lll|;lilllii!i;lM;;;l;li;r^CROSS SECTION OF NINETY-SIXTH STREET POWER STATION, METROPOLITAN STREET RAILWAY COMPANY 2400 lbs; cross-head, 2200 lbs.; connecting rod, 3500 neck; piston rod, 3600 lbs. at root of thread. The power capable of Ijeing developed by this doubleengine is calculated as follows, the revolutions being 75per minute: Displacement of two low-pressure cylinders,63,094 cu. ft. per minute. Horse-power per pound meaneffective pressure, referred to the two low-pressure cylin-ders, 2/S-3^- Displacement perhp low-pres. cu. ft. per mm 7,500 ,000 ,000 ,000 ,000 The guaranteed economy is a consumption of not over M. E. P. referredto 370,000 lbs. rotating in a circle ft. diameter. Withthis fly-wheel effect, together with the uniformity of crankeffort produced by eight imi^ulses per revolution, it is cal-culated that the extreme
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Keywords: ., bookcentury1800, bookdecade1880, bookidstreetrailwa, bookyear1884
