In real life terms, a Berkshire would be about the same boiler highth as a Hudson, but the Berkshire had a larger "super heated firebox" and was much longer than the Hudson, besides, the Hudson had only 6drive wheels, Berk had 8. A Prairie wasnt much more than a 0-6-0 switcher with pilot and trailing trucks added.
One thing you would have to look at also, is the Driver size. A Freight engine might have the same boiler as a Passenger engine, but the Drivers on Freight engines are smaller in diameter and vise-versa on the Pass engine for speed, not torque.
My son's have the O-scale stuff, but from what I have seen, you should find a web site that gives a "standard" highth for a tunnel/bridge opening.
Try this site.... http://www.thortrains.net/
Kevin
One thing you would have to look at also, is the Driver size. A Freight engine might have the same boiler as a Passenger engine, but the Drivers on Freight engines are smaller in diameter and vise-versa on the Pass engine for speed, not torque.
My son's have the O-scale stuff, but from what I have seen, you should find a web site that gives a "standard" highth for a tunnel/bridge opening.
Try this site.... http://www.thortrains.net/
Kevin
