I have a Baldwin 4-6-0 and I have seen one reference to 60 mph but no other info.

Thanks

Very simple to figure.

http://home.cogeco.ca/~trains/rroperat.htm

Rich

I get about 60-65 mph pulling 8 cars on a flat surface with my Baldwin 4-6-0. What Im wondering is if the real loco had about the same limit?

Depends on what they were hauling. Passenger would be faster than freight use. Passenger depended on speed.
Freight, heavier load and slower speed.
They were dual use locos.
One road who used the Baldwin. I Googled Baldwin 4-6-0 speed.
The below ten wheelers had 73 inch drivers.
Yours are 63 inch drivers. Probably would have not run as fast as a 73 inch version but we will probably never know. Like Harold has said here, you can count the rivets, just not all of them.

http://www.gngoat.org/gn_steam_locomotives.htm

Rich