When I built the scenarios I was not going after calculations. What I used was the experience that the actual Montour crews back in the late 1970's. 4 SW9's were used to pull 44, 70 ton loaded hoppers out of Westland and found that 3 tuned SW1500 could do the same thing. Once the P&LE had the complete control over the Montour the SW9's went away and were replaced with leased P&LE SW1500's. A experiment was done at one point where 2 GP38-2's (1 P&LE rr unit and 1 Monongahella rr unit) were tested to see if it was possible to pull loads out of Westland and it was a failure.
Glenn

