-Y6b's began in 1948 Cab #2171 4/48 thru Cab#2200 4/52
-Built in N&W's Roanoke shops
-Last of the Y's
-It looks like there were 29 built 30
-Big coal hauler, of course. 2200 was the last mainline steam locomotive built in the United States
-The last ones ran in 1961, when the N&W finally went to the all diesels...after everyone else. Last was scrapped9/60 oops
-2156 is the closest thing to a Y6b that still exists today 2156 is a Y6a.
2197 was modified with a booster valve and was used in an evaluation against an EMD F7 ABBA consist.
I would very much appreciate someone filling in the blanks. If there was any specific history to #2171 that would be the icing on the cake. 2171 was scrapped 5/70. It "almost" made it into the class of the "Lost Engines of Roanoke".