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Good thread - glad to see you guys getting into it. If you want figures for N&W's Y6, Louis Newton has them in volume 3 of his Rails Remembered. He was present on dynamometer tests working eastbound out of Williamson to Bluefield. This includes 25+MPH running with 7200 tons up the Tug River from Williamson to Farm, where the train was halved for the trip up Elkhorn Mountain's 1.4%, where dragging speeds in the 15MPH range were the norm. In this volume Newton also has data for the three trips between Williamson and Portsmouth with Class A 2-6-6-4 1239 and trains grossing 16,000 tons made in 1952 after the F7s were tested. Newton makes no calculations or efficiency claims, but his data are precise and very, very interesting. On the dynamometer car runs, coal was weighed in the tenders during the runs (in 200-pound increments) and the water was measured. All the runs were with the auxiliary tenders, giving both classes of engines 40,000 gallons of water to start out with (22,000 gallons main tender, 18,000 gallons in the auxiliary tender), and no water or coal stops had to be made en route with either the A or the Y6. I don't have the book in front of me, but as I recall, the Y6 used 35,000 gallons of water on the Williamson-Bluefield run. So if you want to get the book, his data will certainly give you some fresh stuff to chew on. Old Timer
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