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Old 02-23-2017, 03:25 PM
Melbourne Melbourne is offline
Join Date: Nov 2009
Posts: 4,323
Originally Posted by scr4 View Post
Specifically, the boiler needs to sit above the drive wheel axles. The boiler is the largest part of the locomotive. The drive wheels must be connected with solid axles - even if you could design one-sided wheel supports, it wouldn't work because the right/left cylinders will go out of sync.
I think you could probably sync the cylinders. I think that the problem is that the train would drive off the rails.

The wheels are self-centering, but the self-centering is driven by the wheel at the other end of the axle.

You can feel this happening on a train. The characteristic sway of a train is synchronised to the self-centering action of the wheels on the track. If you go too fast for the train/wheel/track system, the train sways right off the track: this sets a maximum speed for a train, even on a straight level track.

Last edited by Melbourne; 02-23-2017 at 03:25 PM.