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traction motors
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I've never seen a 70MAC above 170,000lbs..and that was serious uphill at 8mph with coal. Soooo..in my simple brain I figure I'm doing about 1200 amps with a 40, and I usually luck out. I use the tractive effort bar like a load meter (which it is) and, wait for just a slight reduction in TE, then give it another notch, like a 40. I'm BNSF, but I've run the SP GEACs, and the best I got out of them was 175,000. I remember the guys I fired for in the 60's talk about big steamers (4-8-4s) that would only exert like 90,000lbs, so these engines are pretty amazing...like a 40!!
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