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Old 02-23-2017, 11:05 AM
scr4 scr4 is offline
Join Date: Aug 1999
Location: Alabama
Posts: 14,232
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.