bigkid posted:Not all post war will run on o27, I had a postware F3 (I don't remember the model ) that couldn't go through an o27 curve on my layout, it would derail, whereas my 671 turbine was fine with it (this was when I was a kid).
Interesting. The Williams/WBB F3 uses, as I understand it, the postwar Lionel mold, and is listed as being suited for 27" diameter curves.