. American engineer and railroad journal . he lower rail of the rear frame. As in the enginesof this type built by this company for the Virginian Railway, theload on these bolts is supported by a coil spring through whichthe lov/er end of the bolt passes and which press up againstthe bottom of the rear frame rail, thus giving the flexible sup-port at this point which is necessary in order that the threeboiler supports, viz., the two sliding bearings and the equalizingbolt, may each bear its proportion of the load in any variationof the alignment of the three. Both the front and rear trucks are
. American engineer and railroad journal . he lower rail of the rear frame. As in the enginesof this type built by this company for the Virginian Railway, theload on these bolts is supported by a coil spring through whichthe lov/er end of the bolt passes and which press up againstthe bottom of the rear frame rail, thus giving the flexible sup-port at this point which is necessary in order that the threeboiler supports, viz., the two sliding bearings and the equalizingbolt, may each bear its proportion of the load in any variationof the alignment of the three. Both the front and rear trucks are of the center bearing Total weight -~ total heating surface liime equivalent simple cylinders, cu. ft Total heating surface -~ vol. cylinders Grate area -v- vol. cylinders CYLINDERS. Kind Compound Diameter and stroke : 20J^ & 33 x 32 in. VALVES. Kind H. P Piston Kind L. P Slide Greatest travel H. P 6 in. Greatest travel L. P 6^ in. Outside lap H. P 1% in Outside lap L. P 1 in. Inside lap J4 in. Lead 3/16 SECTIONAL ELEVATIONS OF AT 3 INCH CENTERS. THE INSIDE FIREBOX SHEETS ARE VERTICAL AND THE TUBES ARETHEY SLOPE I^ INCH DOWNWARD TOWARD THE REAR. radial type with swinging bolster and siinilar in design to thatof the Virginian Mallet engines. The bolster is suspended by3-point or stable equilibrium hangers. The truck frame is ofcast steel and the portions of the sides over the journal boxesare shaped to form caps for the coil springs which transmitthe load to the journal boxes upon which they are directlyseated. The principal dimensions and ratios of the design are givenin the following table: WHEELS. Driving, diameter over tires Driving, thickness of tires Driving journals, main, diameter and length. Engine truck wheels, diameter Engine truck, journals Trailing truck wheels, diameter Trailing truck, journals ...57 in. .S/i in. X 13 in. ,..33 in. X 12 in. .33 in. X 12 in. BOILER. Style Working pressure Outside diameter of first ring Firebo
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
