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OK, This should be No 1000 - So ask me a Technical Locomotive Question
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It's not a question I've ever heard come up at the railroad. The stuff is designed to run indefinitely at full horsepower, not like an automobile engine. We assume they can run continuously in any notch until the next required shop interval, 92 days, stopping for fuel, of course. But in marine and stationary applications, the engine is going to run, I suppose, for days or weeks in notch 8. (M636C -- your experience?) Not entirely uncommon to see a locomotive in notch eight for three-four hours at a time. <br /> <br />As for a D.C. traction motor, as long as the motor is not in the short-time rating, it's hours are limited only by required maintenance intervals on the commutator and brushes, I suppose. If it's A.C., the maintenance interval is in weeks or longer, and I would imagine the time at full horsepower might be months before they needed any attention. <br /> <br />OS
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