. American engineer and railroad journal . their design. These three engines arc intendedto work traffic, and to take trains weighing 300 tons upa 4 per cent, grade, combined \vit!i curves of 330 feet radius,and the tests in the builders , have fhdwn the engine? to The boiler is built up of % in. steel plates for the two barrels,while the inner are also of steel, 5/16 in. thick Tayloriron stays are employed between the fireboxes, the water spaceat the top being 8 m., tapering to 6 in. at the bottom. Eachbarrel contains 216 steel tubes lyi in. diameter outside, by 12
. American engineer and railroad journal . their design. These three engines arc intendedto work traffic, and to take trains weighing 300 tons upa 4 per cent, grade, combined \vit!i curves of 330 feet radius,and the tests in the builders , have fhdwn the engine? to The boiler is built up of % in. steel plates for the two barrels,while the inner are also of steel, 5/16 in. thick Tayloriron stays are employed between the fireboxes, the water spaceat the top being 8 m., tapering to 6 in. at the bottom. Eachbarrel contains 216 steel tubes lyi in. diameter outside, by 12 m. between tube plates. One ot the barrels is fitted with asteam dome on whicli are mounted four Ashton pop safetyvalves each 3j/^ in. in diameter, and there is also a fitted immediately below the stack. The otlier barrelhas no mountings, excepting the bell, but is provided with amanhole. The muci ring is formed in one piece without weld,and as a sample of construction constitutes something in thenature of a FAIRLIE TYPE LOCOMOTIVE, MEXIC.\X RY. be capable of passing without ditticidty through a curve of 297feet radius. The engine is mounted on two six-wheeled trucks,each driven by a pair of outside cylind;rs. There are no in-dependent carrying wheels, so that the whole of the weight,138 tons, or 23 tons per axle, is available for adhesion. The valve gears are of the Walschaert pattern, actuatingRichardson balanced side valves, which latter work above thecylinders. A special feature of the valve mechanism is the re-versing gear. This is operated by means of bevel gears fromthe reversing wheel, actuating a horizontal shaft running along-side the boilers and fireboxes, and connecting at each end witha diagonal shaft. This diagonal reversing shaft is fixea on eachtruck with a quadrant and worm gearing, and flexibility is in-sured by providing it with a universal bnll and socket joint ateither end, while the movement of the truck is compensated forby
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
