. Railroad digest . ea ofgrate 20 square feet. Tractive power tons, (16,849 lbs.)Weight in working order, on bogie 17 tons, driving wheels 10tons, 17 cwt., trailing wheels 16 tons, 3 cwt. [On account of the steam reversing gear used the reverselever of this locomotive does not look to be any larger than thecylinder cock lever used on American engines. The engine is a4-4-0 type.—Eds. Railroad Digest.] Auxiliary Air Pumps Railway and Locomotive Engineering, July, 1901, p. I. B. Rich writes: With the increasing difiiculty ofsupplying air for brakes and other auxiliaries, the question
. Railroad digest . ea ofgrate 20 square feet. Tractive power tons, (16,849 lbs.)Weight in working order, on bogie 17 tons, driving wheels 10tons, 17 cwt., trailing wheels 16 tons, 3 cwt. [On account of the steam reversing gear used the reverselever of this locomotive does not look to be any larger than thecylinder cock lever used on American engines. The engine is a4-4-0 type.—Eds. Railroad Digest.] Auxiliary Air Pumps Railway and Locomotive Engineering, July, 1901, p. I. B. Rich writes: With the increasing difiiculty ofsupplying air for brakes and other auxiliaries, the question ofauxiliary pumps is quite an important one. The plan usuallyproposed is to run the auxiliary from the axle. Extended pis-ton rods are quite the fashion, but as they do not do any-thing but puggle back and forth, why not put them to work?There is no need for any additional packing; just let themwork as a displacement pump—single acting. The area of a4-in. rod is square inches, and with 28-in. stroke gives. cubic inches for each piston rod every revolution of thtengine. A 00-in. wheel makes 366 per mile ; or at 15 miles anhour, 84 revs, per minute. This gives cubic inches or17 cubic feet per minute from each rod—34 cubic feet fromboth rods. This is a pretty fair quantity, and can be de-ponded on fairly well, and there is nothing to get out of order,and only one valve to seat besides check valve. Of course thisamount would increase with speed and decrease with smallerrods or shorter stroke. If desired a by-pass could be used or(he inlcl valvf lulc] iii)( n. so as to let the rod run free. Welding Cracked Locomotive Frames Engineering News, July 18, 1901, p. cracked locomotive frames in place is a feat whichis being performed at the West Oakland shops of the SouthernPacific Railway. A small furnace of fire brick is built aroundthe frame at the crack and an oil burner is then introduced andoperated until the frame is brought to a welding heat.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
