. The Street railway journal . a 260-kw a. c. engine typegenerator. These engines are both of the single crank type, but * Length of line 9% miles, 100-lb. girder rails, thirty-two double-deck single-truck cars, double trolley. t Following the precedent established by the Warren plant, the UnionTraction Company, of Independence, Kan., has adopted double-acting enginesof the same size, type and design for railway service, using Kansas naturalgas as fuel. The initial equipment will comprise single-crank and double-crank units of 500 hp and 1000 hp each (sea level rating). § Dimensions of engines
. The Street railway journal . a 260-kw a. c. engine typegenerator. These engines are both of the single crank type, but * Length of line 9% miles, 100-lb. girder rails, thirty-two double-deck single-truck cars, double trolley. t Following the precedent established by the Warren plant, the UnionTraction Company, of Independence, Kan., has adopted double-acting enginesof the same size, type and design for railway service, using Kansas naturalgas as fuel. The initial equipment will comprise single-crank and double-crank units of 500 hp and 1000 hp each (sea level rating). § Dimensions of engines; Cylinder diameter, 21 ins.; stroke, .30 ins.; speed,150 r. p. m. 602 STREET RAILWAY JOURNAL. [Vol. XXVI. No. 14. with the tandem arrangement, a power stroke is developed at eachhalf revolution, as in the double-acting steam engine. The gas delivered at a cost of about 2 cents per thousand cubic feet. Theeconomy in operating with natural gas is striking. In the old gasplant it is estimated that the cost of power averages 75. FIG. 20.—PRODUCER PLANT AT HEYSHAM HARBOR,COAL-HANDLING APPARATUS SHOWING units will operate in parallel on the electrical end, without thenecessity of synchronizing the Owing to the absence ofa battery and the small number of cars, the plant will be subjectedto the most severe test possible. It is estimated that one generating cents per kw-hour, including all items chargeable to oper-ation, except repairs on buildings and battery; the cor-responding gas consumption being 20 cu. ft. per kw-hour. Among gas power stations in American and Britishterritory we find a large number up to 2600-hp capacityoperating on producer, natural and oil gas, and manywith the a. c. system with generators running in elec-trical parallel. In fact, parallel operation by gas engineson a large scale was first accomplished in this country atEast Pittsburg, with three cylinder engines of the ver-tical single-acting type. In view of the success with thistype of engine, it
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