That is truly awesome - but emissions may be a problem LOL
On a slightly smaller scale, but well used around the world where steep grades, narrow gauges and sharp curves and axle loading of the track was limited the Beyer-Garratt enjoyed great success - they had one on the drawing board to have 115,000 lbs tractive effort ( biggest ones up till then were about 80 to 90,000 lbs ) - like the Big Boy they were articulated, they came in various sizes and some with 16 driving wheels. I can remember seeing them in South Africa, Rhodesia and Australia - they were unmistakable, both for the 'off-beat' exhaust sound ( like a V twin ) and the water tender at the front, I think some of them had a mechanical stoker as well.
https://www.youtube.com/watch?v=UfqDyOjIOMU
https://www.youtube.com/watch?v=UitOupBEYgc
http://www.theheritageportal.co.za/a...att-locomotive