Railway and Locomotive Engineering . rnals, 6 in. x 12 in.; diameter,back, 42 in.; journals, 8 in. x 14 in. Wheel Base.—Driving, 16 ft. 6 in.; rigid,16 ft. 6 in.; total engine, 35 ft. 0 in.: totalengine and lender. 68 ft. 2Va in. Weight.—On driving wheels. ; on truck, front, lbs.; on truck,l)ack, 49,-500 lbs.; total engine, 285,400 lbs.;total engine and tender, about 450,000 lbs. Tender.—Wheels, number, 8; wheels,diameter, 33 in.; journals, SA in. x 10 in.;tank capacity, 9,000 gals.: fuel capacity,14 tons: service, freight. 166 RAILWW AND LOCOMOTIVE NG. Mav. 1916.
Railway and Locomotive Engineering . rnals, 6 in. x 12 in.; diameter,back, 42 in.; journals, 8 in. x 14 in. Wheel Base.—Driving, 16 ft. 6 in.; rigid,16 ft. 6 in.; total engine, 35 ft. 0 in.: totalengine and lender. 68 ft. 2Va in. Weight.—On driving wheels. ; on truck, front, lbs.; on truck,l)ack, 49,-500 lbs.; total engine, 285,400 lbs.;total engine and tender, about 450,000 lbs. Tender.—Wheels, number, 8; wheels,diameter, 33 in.; journals, SA in. x 10 in.;tank capacity, 9,000 gals.: fuel capacity,14 tons: service, freight. 166 RAILWW AND LOCOMOTIVE NG. Mav. 1916. Important Devel()|niienl in l^issc n)l\ania Kailroad \\lii-n till- [n<i all sti-i-1 jiassenger car»as built liy the Pennsylvania RailroadCompany at Altoona in 1906. an entirelynew proMem in painting \va< tncountprei! tlicn receives a certain numlier ocoats of varnish, suflicient to lill all voidremaining in the Mat color and to leavi:\ smoolli. • coat of Mirnisli over it. VIEW OF 0\EX. CLOSED, WITH CAR INSIDE THE BAKINi; IKiHESS. The expansion and contraction of stctunder the influence of fluctuations in tenpcrature, is much greater than that < iwood. For example, a piece of stci 1which is seventy feet long at 0 degr<.Fahrenheit would be something like sc\eiity feet, one and eight-tenth inches ;a100 degrees Fahrenheit. The expansionof wood under the same fluctuation intemperature would be less than half asgieat. Steel also conducts heat muchmore rapidly than wood, and suddenchanges in temperature produce rapid ex-pansions or contractions of the steel. Itfollows, therefore, that a painting systemwhich would be satisfactory for not be sufliciently elastic for steelWhen the change in equipment frnmwood to steel was made, it was praclicallvnecessary to carry over the old system ??rpainting and to apply the same principle-on the steel car that had formerly beenapplied to wooden cars. It has alwa\ -been the aim of the compan
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