Railway and Locomotive Engineering . an the usual shoe andwedge oiling and the setting up of thespring nut when suflicient wear has ac-cumulated to allow the main wedge totravel up ?)<) in. The engines are also equipped with theSchmidt superheater, having 48 superheating surface is approximate-ly 24 per cent, of the total water evapor-ating surface, the amounts being 1237 and5191 sq. ft. respectively. The main wheels have plain tires, andthe equalization system divides betweenthe second and third pairs of drivingwheels, but the frames and spring riggingare so arranged that it c
Railway and Locomotive Engineering . an the usual shoe andwedge oiling and the setting up of thespring nut when suflicient wear has ac-cumulated to allow the main wedge totravel up ?)<) in. The engines are also equipped with theSchmidt superheater, having 48 superheating surface is approximate-ly 24 per cent, of the total water evapor-ating surface, the amounts being 1237 and5191 sq. ft. respectively. The main wheels have plain tires, andthe equalization system divides betweenthe second and third pairs of drivingwheels, but the frames and spring riggingare so arranged that it can be readilychanged, if desired, to divide between thethird and fourth pairs. The equalizersand spring hangers are of open hearthhammered steel; the pins are fitted intohardened steel bushings, and are doweledin the hangers to prevent their turning. The sand boxes are four in number,two for running ahead and two for back-ing up. To keep within the clearancelimits, they are placed on the round ofthe boiler. For the same reason the. . : WED and on the opposite side to accommodatethe lesser taper of the floating wedge. Tothe adjusting wedge is attached a wedge- bracket supporting the bell isthe smoke-box front, andhead-lamp is usually placed. where a December, 1916. RAILWAY AND LOCOMOTIVE ENGINEERING. 401 The driving brake system is divided,there being separate pairs of cylinders foroperating the brake shoes on the firstthree and the two rear pairs of wheelsrespectively. The equipment of the loco-motive includes flange oilers on the lead-ing drivers, and also a speedometer. The tender is of the Vandcrbilt type,with a tank 105 ins. in diameter. It hascapacity for 10,000 gallons of water and16 tons of coal. The following table contains furtherparticulars of these locomotives; Gauge. 4 ft. Syi ins; cylinders, 30 x 32ins; valves, piston, IS ins. : Type, straight; diameter, 92 ins.;thickness of sheets. % 15/16 in., 1 in.;wo
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