Sumpter 250's duff challenge

[Sumpter250]

So, perhaps, your OF 2-6-6-2 has a TE= 3/4*75,000 ~ 56,000lb? I tend to recall the Uintah Mallets being around 42,000lbs.

The Uintah #50, and #51, became Sumpter Valley Ry #250, and 251. the boilers on these were about 3 feet longer, and about 6" smaller diameter, than my 2-6-6-2. I would expect my OF 2-6-6-2 would be only a little heavier than the Uintah/SVRY locos, with around 44,000- 46,000 lbs. TE.
(( There's another research project: Determining the gross weight, and Tractive effort of this loco. :o I might have to rebuild a bridge or two ))