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[quote user="Overmod"]With regard to the HHP-8: I am going by the original specs that Bombardier was supposed to have rolled into the design when it was like an 'electric analogue of the JetTrain' -- in other words, electronics suitable for 8000hp continuous and "150mph+10%" design running speed in NEC service. To my knowledge there were no expedient corners cut in the design of the running gear after the design was approved for production ... or before the reliability issues at 8000hp, particularly some aspects of cooling, made functional derating a necessity.[/quote] Sorry, I didn't find an Amtrak specification though the Amtrak Fleet Strategy of 2010 describes HHP-8's max. speed as 135 mph. I think it doesn't matter when comparing HHP-8 and ACS-64 on the NEC. Both run with Tier one railcars and thus are limited to 125 mph in operation. Regards, Volker
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