. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . Surface—Firebox, 200 sq. ft.; fire tubes,76 sq. ft.; feed-water heater tubes, 1,893sq. ft.; firebrick tubes. .U sq. ft.; total, 5,503sq. ft.; grate area, sq. equipped with Santa Fe type superheaterand reheater. Superheating surface, 390fl r< heal ing sui face, 564 sq. Wheels—Diamet ide, 69 ins.; journals, main. 10 x 12 ins.; others, 9 x12 . Truck Wheels—Diameter, front. 31 r4ins.; jouni. 6 : ins.; diameter, back, 40 in I . ioui rials, 8 s u iiWheel Base D
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . Surface—Firebox, 200 sq. ft.; fire tubes,76 sq. ft.; feed-water heater tubes, 1,893sq. ft.; firebrick tubes. .U sq. ft.; total, 5,503sq. ft.; grate area, sq. equipped with Santa Fe type superheaterand reheater. Superheating surface, 390fl r< heal ing sui face, 564 sq. Wheels—Diamet ide, 69 ins.; journals, main. 10 x 12 ins.; others, 9 x12 . Truck Wheels—Diameter, front. 31 r4ins.; jouni. 6 : ins.; diameter, back, 40 in I . ioui rials, 8 s u iiWheel Base Driving, 37 ft. 10 in-., rigid, 13 erly counter-balanced engine is the causeof many broken rails, which may resultin great destruction to property and persons. To emphasize this, you will pleasehear with me while 1 point out thatfrom 1885 to 1907 the axle load lias in-creased from 24,000 pounds to 53,500pounds, an increase of 123 per cent. Theaverage weight on drivers has increasedfrom about 60,000 pounds in 1885 toover 180,000 pounds in 1907. In conneclimi with these great increases, and in. ill. I. SECTIONS OF ACCI ft. S ins.; total engine. 56 ft. 5 ins.; totalengine and tendei. 89 it. .< —On driving wheels, lbs.; Onck, front. ) : back. 46,000 lbs.:tnal engine. 392,300 lbs.; total engiix r ;tender, about 502,000 lbs, -—Wheels, diameter, i-i, ins.; journals,SA x 10 ins.; tank capacity, gals.;fuel capacity, 12 tons; service, passenger. Duties of the S. M. P. In his paper on Alabysis—Chemicaland Otherwise, presented to the CentralRailroad Club, Mr. E. M. Tewksburygive? an interesting analysis of what heconsiders to be the duty of a superin-tendent of motive power. That part ofthe paper reads: The superintendent of motive powernot only analyzes his master mechanics,master car builders, and the whole force,but when his assistant places before hima design, say, for a new locomotive, heat once proceeds to analyze it. He mustknow bef
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