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[quote user="feltonhill"]Timz has a point here.  7,500 tons at 64 mph on level track would take 10,000 to 11,000 drawbar hp, steam, diesel, electric or millions of mice.  An A can't to it on level track.  Such speed would require about a -0.15% downgrade with a single A.  Davis formulas aren't perfect, but they're very good at estimating train resistance.  Timz has a working knowledge of this info - he's done the homework, years ago.[/quote]Hi Feltonhill and Timz,the U.P track from Julesburg to North Platte is ~ -0.15%. Reaching speeds with 7657tons up to 50, 60-70mph with 3985 should be plausible, now.Can we calculate the DBHP by that?Kind regardsLars
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