. Railway and Locomotive Engineering . wide, with single front extensions 11 under the cylinders. Transversebraces of cast steel are placed at the first,second and third pairs of driving pedes-tals, and also back of the fourth pairwhere the rear frames are spliced to the Water Space—Front, 4^2 ins.; sides, 4ins.: back, 4 ins. Tubes—Material, steel, and iron; thick-ness. No. 9 W. No. 11 W. G.; number,32, 234; diameter, 5f4 ins., 2 ins ; length,17 ft. 8 ins. Heating Surface—Fire box, 210 sq. ft.;tubes, 2,946 sq. ft.; total, sq. ft.;grate area sq. ft. Driving Wheels—Diamet
. Railway and Locomotive Engineering . wide, with single front extensions 11 under the cylinders. Transversebraces of cast steel are placed at the first,second and third pairs of driving pedes-tals, and also back of the fourth pairwhere the rear frames are spliced to the Water Space—Front, 4^2 ins.; sides, 4ins.: back, 4 ins. Tubes—Material, steel, and iron; thick-ness. No. 9 W. No. 11 W. G.; number,32, 234; diameter, 5f4 ins., 2 ins ; length,17 ft. 8 ins. Heating Surface—Fire box, 210 sq. ft.;tubes, 2,946 sq. ft.; total, sq. ft.;grate area sq. ft. Driving Wheels—Diameter, outside. 57ins.; center, 50 ins.; Journals, main, 11ins. X 12 ins.; others, 10 ins. x 12 ins. Engine Truck Wheels—Diameter, front,30 ins.; journals, 6/^ ins. x 10^ ins.;diameter, back, 40 ins.; journals, 8 ins. x14 ins. Wheel Base—Driving, IS ft. 0 ins.;rigid, 15 ft. 0 ins.; total engine, 32 ins.; total engine and tender. 64 ins. Weight—On driving wheels, ; on truck, front, 27,300 lbs.; on MIKADO TVP1-: FOR THK .\\NT.\,J. F. Sheahan, .Motive Fewer. l!IRMIX(;n.\M & .\TL,\.NTIC K.\ Baldwin Locomotive Works. liuiMc in the amount of smoke emitted whenusing high volatile coal. As applied to the new Mikado typelocomotives, the firebox is 134 ins. longby 84 ins. wide, and is not unlike theWooten type in shape. The actual lengthof the grate, however, is only 89 ins. Fir-ing is accomplished through two circulardoors, placed 36 ins. apart transversely;and a power grate shaker is applied. Thefront part of the furnace is used as acombustion chamber and is separated fromthe rear part by a brick wall. Provisionis made for discharging pre-heated air,in a backward direction at the top of thiswall. This aids in the combustion of thegases, and because of the manner in whichthe air is discharged from the wall, keepsthe rear of the firebox filled with flame,thus increasing the effectiveness of thecrown and back sheets a
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