Originally Posted by steam fan:
The 611 may have been just a touch faster up the hill with the 80,000 pounds of TE, but if you were able to push 765 up to the same 300psi boiler pressure, the 765 would have probably been a touch faster too. This pull is possible because these two engines have 69-70 inch drivers, whereas something like a 80 inch drivered UP FEF or a Santa Fe 4-8-4 probably would have stalled, IMO.
I wouldn't assume that at all.
A Texas 2-10-4 with 63 inch drivers would have marched right up it.
You assume a K4 with a booster would be faster, that would be if the booster engine doesn't start slipping and you have to shut off the throttle. There's a video of 2716 having problems on a grade down south, where the booster causes more problems than it solved.
