I wouldn't mind having a full scale steam engine for my perimeter track. It's approximately 042 give or take a couple of degrees. I bent the Gargraves around my stomach and hot water heater during the build. My full scale *Williams* GG1s round the curves just fine, except for one curve that's borderline tight. Good smoke, whistle and pulling power are most important, along with PRR or NYC road names. It doesn't have to be high tech.
Does anyone have any ideas?
Thanks - Ponz