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[quote user="friend611"]I would have to work from excursion era videos, as much 1950's footage is not available to me. I have seen one segment of film from 1959, where the 611 is being chased at close to 100 miles an hour between Petersburg and Suffolk. As I saw, the drivers are going so fast that tracking individual revolutions is almost impossible. I would estimate less than 1/4 second per driver revolution, even down to 1/8 or 1/16 second if necessary. I have seen fast footage in excursion service, especially one run on the Nickel Plate west to Fort Wayne in 1983. On this run, the video producer estimated the speed at over 75 miles an hour, but I recall the driver revolution time at around 3/4 to 1 second. The speed was not constant during the run, as the engine would slow down and then speed up again. Anyway, this is a subject that will require further analysis. Reference if you want to estimate driver speed on runs: 1959 run: Pocahontas Glory Volume 5, Herron Rail. 1983 run: Queen of the Fleet, Hopewell Productions. lois <div style="clear:both;"></div> [/quote]   That's crazy fast. I feel like I shouldn't be surprised but I am. So much harder than I thought it would be!
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