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Locomotive horse power???? Here is a question for you guys. What unit can pull more cars. An SD-38-2 with 2000 HP or an SD-40-2 with 3000 HP. Now both units weigh the same and they both have six traction motors. The answer is both units would pull exactly the same amount of cars. When it comes to starting a train horse power has very little to do with it, because no matter how much horse power you have if you do not have tractive effort to grip the rail you will not move that train. Horse power equals speed that is why the ATSF use to buy GP-60's and B-40-8's because they always put lots of units on their trains and they were not really concerned about tractive effort they were more concerned about speed. With the 4 axle units the ATSF had all that HP is feeding 4 traction motors. Wow those units would really fly!
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