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I think Jeff is on to something. I can't see any SW1001 in long-term helper service on Horse Shoe Curve. My guess is that she was being broken-in (or test run) after coming out of the shops.

 

Good catch, as John posted.

 

On the other hand, her Reading heritage probably made her the best choice to add some oomph to get the train over the hill.

Originally Posted by Popsrr:

Maybe they are short on Motive Power and had to take what they had. Wonder what the HP for the helper is compared to the regular motive power they were using?

That engine has 1,000 HP. The regular helpers have at least 3,000 HP (the SD40-2s) and go on up to 4,400 HP.

 

NS would not regularly use a little 1,000 HP switcher in heavy helper service. The SW1001 has only 57,000 pounds of starting tractive effort. This tapers off to only 36,000 lbs at its minimum continuous speed of 11.0 mph. Most trains have sufficient power to go up the hill and around the curve faster than 11 mph, which means this little switcher may have only been "helping" with less than 30,000 pounds of tractive effort.

 

To put the SW1001s TE numbers in context, and SD70 has 175,500 pounds of starting tractive effort and can maintain 137,000 pounds at 12-15 mph.

 

A more likely scenario is that it was simply being road tested after repairs in Altoona.

Last edited by Rich Melvin
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