. Railway and Locomotive Engineering. approxi- Frisco Pacific. M. P il. Frisco. mately sameweight as Per the Frisco. Pounds. Cent. Starting 34,140 6,660 30 2,090 35 21,210 19,540 1,660 40 18,560 17,110 1,450 45 15,200 1,240 50 13,650 1,010 Boiler—Type, extended wagon top; first ring, 74 ins.; working pressure,175 lbs.; fuel, bitum. coal. Firebox—Type, wide; length, 108 ins.;width, 68^ ins.; thickness of crown, 34in.; tube, ^ in.; sides, 5^ ins.; back, Jiin.; water space, front,4^2 ins.; sides, 4J4ins.; back, 4<^ ins. Crown sta
. Railway and Locomotive Engineering. approxi- Frisco Pacific. M. P il. Frisco. mately sameweight as Per the Frisco. Pounds. Cent. Starting 34,140 6,660 30 2,090 35 21,210 19,540 1,660 40 18,560 17,110 1,450 45 15,200 1,240 50 13,650 1,010 Boiler—Type, extended wagon top; first ring, 74 ins.; working pressure,175 lbs.; fuel, bitum. coal. Firebox—Type, wide; length, 108 ins.;width, 68^ ins.; thickness of crown, 34in.; tube, ^ in.; sides, 5^ ins.; back, Jiin.; water space, front,4^2 ins.; sides, 4J4ins.; back, 4<^ ins. Crown staying—Radial; tubes, material,seamless steel Xo. 247; diameter, 2 ins.;length, 20 ft.; gauge. No. 11 B. W. G. Boxes—Driving, main and others, caststeel. Brake—Driver, New York; tender,New York; air signal. New York; puinp,No. 6 Duplex: reservoir, l-20!.2 ins. x42 l-20v; ins., x 60 1-24^2 ins.,X 60 ins. Engine truck—Four-wheel swing mo-tion 3 point suspension hanger. Trailing truck—Radial with Geo. Hancock, Gc PACIFIC TVPE OF L0C01I0TI\E FOR THE FRISCO LINES. dent of Motive Power. Company, Builde powers at various speeds starting upto 50 miles per hour of the Frisco loco-motive and the average for 5 other repre-sentative Pacific type locomotives of re-cent construction of approximately thesame weight is given in the annexedtable. Assuming that the locomotive will de-liver a tractive power of 14,660 poundsat 50 miles per hour, as shown in theannexed table; this would luean 1,950 in-dicated horse power. At a rate of steamconsumption of pounds per 1 h. hour, a conservative average figurefor a superheated engine, even when notworked to its capacity, and includingsteam used in cylinders and air pumpsand losses through safety valves thiswould mean a water evaporation of 42,-206 pounds or pounds per sq. ft. ofheating surface per hour. Except with apoor grade of coal, the boiler should beable to maintain this rate of evapor
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