| Here is the 32nd of 36 plates constituting the "Centennial Album of Pennsylvania R.R. Photos and Prints." It was published in the April 1946 issue of "Railroad" magazine, page 41. Photo Caption: "Flexible-Beam Engine. Baldwin, whose engines are an inseparable part of the Pennsylvania tradition, made a fortune on the flexible-beam type driving wheel arrangement which permitted lateral play of two sets of drivers by means of a secondary, pivoted frame. This eliminated binding of the flanges on six- and eight-coupled freight haulers. Bellefonte & Snow Shoe Railroad's 3-spot made use of the design." |