Contributing Design Factors in Tractive Effort

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Contributing Design Factors in Tractive Effort

Postby es80ac » Sun Aug 27, 2017 10:16 pm

Just out of idle curiosity that GE AC6000CW has a starting tractive effort at 188000 lbs while weighing at 423000 lbs, ES44AC has TE of 183000 lbs weighing at 432000 lbs, SD90MAC-H has TE of 200000 lbs weighing at only 415000 lbs.

What design factors contributes most to the maximum tractive efforts? Is it the traction motors or the truck design or software? Can we really trust the EMD SD90 has such a significant TE advantage over the GE counter parts while weighing less? I always thought GE being the electric component builder by pedigree has the better traction motors and electrical gears than EMD, why then does EMD seem to have an advantage in the starting tractive effort?
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Re: Contributing Design Factors in Tractive Effort

Postby MEC407 » Mon Sep 04, 2017 7:24 pm

I'm very skeptical of that EMD TE number. I suppose it's not impossible, but it seems improbable.
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Re: Contributing Design Factors in Tractive Effort

Postby es80ac » Mon Sep 04, 2017 11:07 pm

MEC407 wrote:I'm very skeptical of that EMD TE number. I suppose it's not impossible, but it seems improbable.


Me too, especially with the EMD number being the perfectly rounded 200000 lbs:) Wonder if they got the measurement from the testing from a dyno car or more of a hypothetical figure.
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