Posted by B. Holt on February 28, 2015 
So they did not upgrade it to an SD40-2 or -3?
Posted by Lewis Marien on February 28, 2015 
Great looking unit. Way to go, NS!
Posted by on February 28, 2015 
So is this engine going to be recognized as NS 3170, or Southern 3170?
Posted by landrover on February 28, 2015 
NS 3170 It Will Be A Heritage Unit , Way To Go NS . Well Done
Posted by YL on February 28, 2015 
Details all the way down to the white on black numberboards!
Posted by John Simpkins-Camp on February 28, 2015 
Very nice...you have to honor your roots!
Posted by jdayrail on March 1, 2015 
Just enough minimalist style to show how Southern was and classy NS is.
Posted by Driver8666 on March 1, 2015 
and long hood forward configuration
Posted by Kibu on March 1, 2015 
If you look closely, you can see that they even have the long hood designated as the front, as it should be.
Posted by Gary on March 1, 2015 
Can anyone tell me what the "W" signifies next to the number please?
Posted by Chad Karschner on March 6, 2015 
Will Jordan, the "W" after 3170 was a check code used by the Southern Railway. Assigning numbers to digits: A=0, F=1, H=2, J=3, K=4, L=5, R=6, T=7, W=8, and X=9. The formula to figure out what letter was assigned is as followed: take the first number, add twice the second number, add the third number, and last add twice the fourth number. So for example take Norfolk Southern's heritage Southern Unit #8099 with the letter K after it. The formula would be: 8+(0*2)+9+(9*2) however, if you plug that in right away it won't work. If any number once multiplied is a two digit number, those two numbers are then added together so now the formula reads: 8+(0*2)+9+(1+8)=26. The final step of the formula is to then subtract your number from the nearest multiple of 10 above your answer and subtract it so now the formula is, 30-26=4, thus giving us the letter K. I hope this was helpful and easy to understand.
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