I’m in process of building a tunnel with an increasing radius curve. there is one 6" strretch that the side clearance from outside rail to side wall drops to 2.7125".
While I don’t have plans to run heavyweights or modern length freight cars I would like to be able to run some of the larger steam profile engines like the 3 truck shay, a J3 Hudson, or Unitah mallet.
I have not found a difinitive resource that outlines curve overhangs and limitations. Any sources? or experience?
thanks in advance for input…
mark