. The Street railway journal . ose Sept. 25, but the popu-larity of the car has been so great that its trips will be con-tinued indefinitely. The story comes from Dayton (Ohio) that a 60-lb. pig, whichhad become entangled in the fender of a Dayton & Xenia carwhile out in the country, was carried into the city accuracy of this story cannot be vouched for. CURTIS STEAM TURBINE BY AUSTIN R. DODGE. The Curtis turbine, in addition to nozzles delivering steamat high velocity to a single wheel, has also stationary vaneswhich redirect the steam discharged at considerable velocityfrom the
. The Street railway journal . ose Sept. 25, but the popu-larity of the car has been so great that its trips will be con-tinued indefinitely. The story comes from Dayton (Ohio) that a 60-lb. pig, whichhad become entangled in the fender of a Dayton & Xenia carwhile out in the country, was carried into the city accuracy of this story cannot be vouched for. CURTIS STEAM TURBINE BY AUSTIN R. DODGE. The Curtis turbine, in addition to nozzles delivering steamat high velocity to a single wheel, has also stationary vaneswhich redirect the steam discharged at considerable velocityfrom the first wheel, due to the relatively low bucket speed, intothe second wheel. The velocity of the jet leaving the nozzle isabout 2000 ft. per second, about half the velocity of the DeLaval under the same conditions of exhaust pressure, while theperipheral speed of the vanes in the Curtis is proportionallymuch less, about 400 ft. per second, instead of 1200 ft. persecond. By this process of fractional abstraction the speed of. CURTIS TURBINE IN NEWPORT STATION OF THE NEWPORT &FALL RIVER STREET RAILROAD COMPANY revolving vanes need not be excessive to secure maximumeconomy; in other words, to bring the direction of the jet dis-charged from the last set of vanes parallel to the shaft, asshown in the velocity diagram. With this high steam velocityonly a minimum of revolving vanes are necessary, and theyrotate in steam which has a lower density, due to the con-siderable drop in pressure from one stage to the next. There isa large clearance between outer wall of revolving vanes andthe shell, reducing friction due to water of condensation. Endthrust is eliminated, as there is abundant opportunity for thepressure to equalize on each side of the revolving discs, andthe entrance and discharge angles of the vanes are the same. In the larger sizes of the Curtis type the shaft is vertical andfloats on oil under sufficient pressure to balance the weight ofthe revolving element, which rises a f
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
