B&O s-1 2-10-2 big six

[train guy]

Well thanks Tony!
This helps my modeling the B&O on Sand Patch Grade!

[ebtnut]

Presuming the Bachmann 2-10-4 is correct, the drivers would be 74" diameter, about 10" bigger than the S-1's.  I think they are also disc-type drivers, rather than conventional spoked type. 

[train guy]

Thanks for all your replies and sorry for dissapearingh off the network for a while!