This is an engine that id hope would be made in O scale other than my KTM and suprised it hasn’t by anyone else. I bought an HO Brodway Limited A while back because I loved the engine so much. (I don’t have HO)
Out of the 144 of them that were built some may know Union Pacific #5511 “TTT-6” is the last remaining survivor of that class. The engine was also in “Last Of the Giants” Film.
The coolest part of the engine besides the huge overhanging flat faced boiler is that some were built with “Young” Valve gear which is quite rare. Others were built with “Walschaert” Valve. Seeing the movement of The Young Valve gear is dramatic compared to the Walschaert. Also some featured a large exhaust stack others had a smaller one. Baldwin, Lima, and Alco built them for UP and followed the same cosmetic design.
Lets have Scott add that to the list of produced 3rd Rail Engines!