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Steam & Excursion > 611 dynamometer results?Date: 12/01/15 01:27 611 dynamometer results? Author: typebangin The 611 thread below made me wonder if the dynamometer info from the 4th of July weekend trips was ever made public? 611 pulled the NS Research car all 3 days on the public excursions over Blue Ridge and Christiansburg grades this summer. I believe it was being used to see how much drawbar HP 611 developed. Just curious...
-James http://www.steamtrainvideos.com Date: 12/01/15 06:09 Re: 611 dynamometer results? Author: feltonhill NS has not released the results of the tests. There is a lot of data to be analysed and it may be a priority problem. I don't know what the reason is.
Date: 12/01/15 09:42 Re: 611 dynamometer results? Author: johnacraft typebangin Wrote:
------------------------------------------------------- > The 611 thread below made me wonder if the dynamometer info from the 4th of July weekend trips was ever made public? > 611 pulled the NS Research car all 3 days on the public excursions over Blue Ridge and Christiansburg grades this summer. > I believe it was being used to see how much drawbar HP 611 developed. I saw some raw numbers mentioned elsewhere that tracked well with the steam-era calculated numbers, but haven't seen any final results. Conditions weren't ideal for recording the highest possible horsepower output. Horsepower is a function of speed, and the J was designed to lead 12-car trains up the grades at track speed, not lug 23 cars at a walking pace. The Sunday trip to Lynchburg probably produced the highest consistent recorded horsepower - the train was moving at a good speed near the top in both directions. Saturday's trip might also have produced some good numbers west of Montgomery tunnel, where the speed increased.  Date: 12/02/15 15:26 Re: 611 dynamometer results? Author: feltonhill It should be noted that the above curves are calculated, as N&W stated. In the original report, N&W noted that the curves were theoretical, but the explanatory note has been removed. As a result, these curves do not reflect actual performance. They are calculated using the so-called Baldwin Method, which is OK but very conservative for modern steam locomotives. the Class J could do better than this. N&W also noted this in the test report that contained the above graph.
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