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Feltonhill, 'tip my hat again about your superiour knowledge and helping us to put some data into right order. [quote user="feltonhill"]  As I've written here before, analyzing and comparing steam locomotive performance is a very difficult process, if it's possible at all. [/quote] Yes, as before another member at a different thread pointed out preciesly "to sad, they did not do tests like "Road & Track" on steamlocomotives... It is even more frustrating with books, many figures must be carefully examined and revised with other sources. Often numbers are out of whack (es. German books featuring US engines, aarghhh!); you think you are lucky to gain some drawbar tests, only to be got teached to forget all about this again... its a natural learning process in general. Great, here are very well informed members on this forum, willing to grant some knowledge. BTW:  looked at J's technical drawing at the ASME booklet, dated 1982, the rated max. drawbar hp is 4400. Hmmm, maybe nobody told the J about that, itseld did not care about it and put additional 600hp? Kind regards lars
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