. American engineer and railroad journal . comotives of the same design Road D. I. & W Total weight, lbs 201.(100 Weight on drivers, lbs Wgt. driv. -t- total Tractive effort, lbs 35 100 Diameter drivers, in 69 Cylinders, 21!^ X 26 Steam pressure, lbs 215 Total heating surface, sq. ft Grate area. sq. ft Tractive effort, -i- heating Total weight -s- heating surface. B. D. ratio 717. Heating surface -*- cyl. vol 311. Reference in Amer. Exg 1905 p. 407 C. & N. W. C. P. R. 190,000 14 ., 141,000 30.

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. American engineer and railroad journal . comotives of the same design Road D. I. & W Total weight, lbs 201.(100 Weight on drivers, lbs Wgt. driv. -t- total Tractive effort, lbs 35 100 Diameter drivers, in 69 Cylinders, 21!^ X 26 Steam pressure, lbs 215 Total heating surface, sq. ft Grate area. sq. ft Tractive effort, -i- heating Total weight -s- heating surface. B. D. ratio 717. Heating surface -*- cyl. vol 311. Reference in Amer. Exg 1905 p. 407 C. & N. W. C. P. R. 190,000 14 ., 141,000 63 63 63 21 X 26 21 ■ 26 21 X 28 200 200 200 12. 73. 750. 655. 870. 250. 287. 215. 1907 p. 247 1906 p. 16 built in the shops of the company. These were followed in thenext year by the class D-3-A, which have 21 x 26 in. cylinders,69 in. drivers and weigh 174,000 lbs. total. There are four en-gines in that class. In 1905 and 1906 the first of the class D-3-B,.

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