. The Street railway journal . g was then being done in the way of anactual construction of a turbo-generator of the capacity neededfor the Rapid Transit Subway power house, nor were the re-sults obtained from the use of smaller turbines considered tobe of a character which would justify the purchase of a tur- of steam turbines, if desired, of 8000-kw or 9000-kw generatingcapacity. MAIN ENGINES The main engines are similar in type to those installed bythe Allis-Chalmers Company in Seventy-Fourth Street powerhouse of the Manhattan division of the Interborough RapidTransit Company, in that each
. The Street railway journal . g was then being done in the way of anactual construction of a turbo-generator of the capacity neededfor the Rapid Transit Subway power house, nor were the re-sults obtained from the use of smaller turbines considered tobe of a character which would justify the purchase of a tur- of steam turbines, if desired, of 8000-kw or 9000-kw generatingcapacity. MAIN ENGINES The main engines are similar in type to those installed bythe Allis-Chalmers Company in Seventy-Fourth Street powerhouse of the Manhattan division of the Interborough RapidTransit Company, in that each consists of two component com-pound engines, both connected to a common shaft, with the 6i6 STREET RAILWAY JOURNAL. [Vol. XXIV. No. 15. generators placed between the two component engines. Theprincipal details of the engine are shown in an accompanyingdrawing. This type of engine is now well known and will notbe described in detail, but as a comparison of various dimen-sions and features of the Manhattan and Rapid Transit Sub-. THE STEAM CYLINDERS OF THE CONDENSER CIRCULATINGPUMPS, EXTENDING ABOVE THE MAIN OPERATING FLOOR way engines may be .of interest, the accompanyingis submitted: tabulation Diameter of high pressure cylinders, inches 41 ljw pressure 11 Stroke, inches _ Speed, revolutions per minute Steam pressure at throttle, pounds I ndicated horse power at best efficiency-. Diameter of L. P. piston rods, inches H. P. lt 11 crank pin, inches Length of crank pin, inches Type of L. P. valves , H. P. Diameter of shaft in journals, inches Length of journals, inches Diameter of shaft in hub of revolving element , Manhattan 44 inches88 60 75 R. P. ,5008 inches8 18 18 Double Ported,Corliss 34 inches60 37 1-lti Rapid TransitSubway 42 inches86 60 75 R. P. ,50010 inches10 20 18 Single Ported,CorlissPoppet type34 inches60 37 1-16 inches The guarantees under which the main engines are beingfurnished and which will govern their acceptance by the pur-chaser are in
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
