Tom, great shot.... Actually, I believe that the Western Maryland had 4 RS-3's with steam generators. # 192, 193, 194, and 197
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What was the reason for high hood?
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The high hood accommodated a steam generator for passenger service. They became known as "hammerheads".
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There were very many RS3s built with steam generators, the New York Central alone had 105 of the model so-equipped. But those with the expanded height short hood were also equipped with dynamic brakes, whose grids on RS3s are sited in the short hood as well. The modification was necessary to allow the d/b grids, (which show on WM 193 atop that hood,) to be mounted above he s/g boiler. It should also be pointed out here, that the C&NW had the only six-motored, high-short hood, Alco-GEs, RSD4s 1619-1620, and RSD5s, 1686-1688. In "Diesels of the Chicago & North Western," Withers Publishing 1995, there is an excellent photo of 1688 from the rear on page 171. The RSDs had a more angular short hood, whose contours resemble a Baldwin hood with a slightly curved top, most likely because larger grids were required to dissipate the heat generated by six-motored units.
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