Charlie, thanks for taking the time to provide your very thorough explanation. I think I get it now but I'll find out if that's true when I actually build the turntable and roundhouse.
As far as the rotational power for the turntable, I suppose horses or other draft animals could have been used as well. Modeling that would be pretty interesting.
With the electric powered TTs, is that what the arch over the TT bridge is for - stringing overhead power cables to the TT?
Thanks again for sharing your knowledge.
Tom, that's a cool picture of man-handling a locomotive. It seems like it would take a lot more men than just one with a lever to move it. I imagined a bunch of guys climbing down into the pit and pushing the TT.
Casco