Hi All

I have an average 2.7% uphill, how many loco's (SD70) would be needed to pull ±16,500 ft (210 double stack wells, 14,500 tons) at a steady pace without losing speed. I have tried a lot of numbers and with 10 x UP SD70M (5 in front, 3 in the middle, 2 at the back) + 5 x UP GE 8500HP Gas, the pace is steady. Which loco would require less numbers to pull such wait.

My question is how many locos in real life will be able to pull this wait on an uphill