Hey all!
I’m curious but what’s the ratio for locomotives and railcars because I’m trying to put together a coal freight train with NS power ranging in the. 4,000-6,000 HP area for instance
This is all for Southline District RO-Scale
Anything helps!
Especially, @zugmann since he works for NS and might know 
Yeah… don’t tag me.
If I know and can answer a question I will.
Ok, Sorry! 
Don’t know about the specifics since I retired at the end of 2016.
The CSX standard was 2 AC’s for 90 cars loaded to the 286K maximum allowed weight. As info - steel hoppers have a light weight of approximately 58K pounds, aluminum hoppers have a lightweight of about 43K pounds - 7.5 more tons of paying cargo can be handled in the aluminum cars vs. steel cars - 675 tons more product and more freight charges with the aluminum cars in 90 car trains.
Since I have retired, CSX has started using Distributed Power on their trains - I don’t know the particulars on how DPU’s and trains are being configured. I believe train size has been increased to 135 cars, at least for the customers that can handle that size of train. I believe they are using 2 AC’s on the head end and a single mid-train DPU on the 135 car trains.
Thanks, @BaltACD, that really helps, so if I’m right, the ratio is 2:90 (you said 2 AC units for 9 Cars), and if I wanted to split that to a single unit, then the ratio would be 1:45 for 3 units, maybe the ratio is 3:135 as you mentioned 2 in the front and 1 mid-DPU so I think I got that one sorted a little bit 
Thanks! 
