. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . o the engines above described,with cylinders 21 x 26 ins., driving wheels73 ins. in diameter and working pressure equipped with a radial trailing truck hav-ing inside journals. The rear frames areof slab section; they are spliced to themain frames back of the rear drivingpedestals and arc supported on invertedleaf springs between the drivers and trail-ers. The main frames are braced by 1 lk«Ym -— ■ V ■ ■• V 1 ■■■l ;^-w^ ^ •iwr^^ M \uKTlli;i;.N i.\i_ II- u of 180 lbs., they exert a tractive fo
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . o the engines above described,with cylinders 21 x 26 ins., driving wheels73 ins. in diameter and working pressure equipped with a radial trailing truck hav-ing inside journals. The rear frames areof slab section; they are spliced to themain frames back of the rear drivingpedestals and arc supported on invertedleaf springs between the drivers and trail-ers. The main frames are braced by 1 lk«Ym -— ■ V ■ ■• V 1 ■■■l ;^-w^ ^ •iwr^^ M \uKTlli;i;.N i.\i_ II- u of 180 lbs., they exert a tractive force of24,760 lbs., and with 100,800 lbs. on driversthe ratio of adhesion is The samecylinder and cylinder head patterns areused for both classes of engines. On theAtlantic type locomotives, the cylinders are L( 11 I )M()ri\i-;. steel castings placed over both pairs ofdriving pedestals. The distribution ofweight is 100,800 lbs. on the drivers, 51,950lbs. on the front truck and 44,300 lbs. onthe trailing truck. This gives a totalweiglit of 197,050 lbs. for the engine itself,. .\TL.\iNTIC TYPE FOR THE NORTH KK.\ IACIFIC. W. Moir, Mechanical Superintendent. Baldwin Locomotive Works, Builders izers of cast steel bolsters. The tenderframe is composed of 13-in. tank capacity for water is 7,000 gal-lons and the amount of fuel carried is 12tons of soft coal. bored to a diameter of 22^4 ins., and arclined with cast iron bushings -^s is. valve motion details are closely sim-ilar throughout, being interchangeablewherever possible. The Atlantic type is and with the tender the weight amountsto about 320,000 lbs. The boiler is straight topped, with threerings in the barrel, the front one havinga diameter of 72J4 ins. The grate is of 2l8 RAILWAY AND LOCOMOTIVE ENGINEERING May, 1909. the same size as that used on the Pacifictype locomotives, and a large number offittings are thus common to both arrangement of the brick arch is
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