The donors, Frank A. Wardlaw and Frank A. Wardlaw, Jr., presented the model (USNM 310586) to the Museum in 1933.
Figure 73.—Operable model of British locomotive Greyhound, 1905.
Pennsylvania Atlantic-Type Locomotive, 1907
The Atlantic-type steam locomotive is represented in the Museum collection by a nonoperable model ([figure 74]) lent to the Museum in 1922 by E. Howard Askew of Baltimore, Md. Constructed by the lender, the model (USNM 307949) is 32 inches long and has a gauge of 2½ inches.
It represents the Pennsylvania Railroad class E3sd No. 5127, a 4-4-2 steam locomotive with Walschaert valve gear. The original locomotive was built at the railroad’s Juniata shops, Altoona, Pa., in August 1907, construction No. 1734. Originally a class E3d locomotive, it was converted to an E3sd in June 1913 by the addition of a superheater in the Wilmington, Del., shops of the road.
Figure 74.—Model of Pennsylvania Atlantic-type locomotive, 1907.
In a letter to Askew (Dec. 14, 1922) the chief of motive power of the Pennsylvania System, J. T. Wallis, stated that the cylinders of the original had a bore and stroke of 22 and 26 inches. The drivers were 80 inches in diameter and the boiler carried a steam pressure of 205 pounds. The boiler had a minimum (internal) diameter of 65½ inches, and it contained 170 2-inch flues and 24 5½-inch flues, while the superheater consisted of 96 1½-inch flues. The distance between flue sheets was 180 inches and the total heating surface was 2,571 square feet. The grate was 111 inches long and 72 wide.
The total weight on the drivers was 127,200 pounds, on the engine truck 35,500 pounds, and on the trailer truck 33,900 pounds—or a total of 196,600 pounds in working order. The weight of the tender in working order was 134,000 pounds. The tractive force of the locomotive was 27,409 pounds.