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[quote user="Entropy"]That was introduction of the radial truck, gave the same rail and wheel wear of a 4 axle. [/quote] The ATSF GP60M weighs 282,000 lbs with an axle load of 35.25 tons. With cowl it would have been 305,000 lbs. Source: <a href="http://qstation.org/GP60M_135/">http://qstation.org/GP60M_135/</a> Railroads have lived with non-steering C-trucks before and are still doing it. [quote user="Entropy"]Progress has also made the PR30C, six axle. I'd say thats more customer demand driving that. 4 axle is typically the preferred way of switching and gets paired with these high speed engine combinations. Notwithstanding the 710ECO repowers. [/quote] Would you tell me please what this is meant to mean in regards to my cited sentence? BTW the Progress Rail PR30C has a Caterpillar 3516C-HD engine. Reagards, Volker
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