Problem found
American flyer pre-war switches are 42" diameter. Now one thing I have noticed is that people dont know the difference between radius and diameter. Lionel track is in diameter. Here is an incorrect example I found on the net:
Lionel O-Gauge Track
Lionel track is characterized by its 3 rail design, where power is carried in the center rail. Standard curved track is available in radii of 42”, 54” and 72.” Lionel’s FasTrack has curve sections with radii of 36”, 48”, 60” and 70.”