Kato Unitrack vs Bachmann EZ track (N scale)

[Brakie]

I believe the six axle indication refers to diesels that have two 3-axle trucks. 3 axle trucks have a very short distance between the axle centers in the trucks, thus making it more difficult to run through smaller radius curves. This applies also to three axle trucks on passenger coaches. Larger steam engines, particularly with three or four drivers will require that the center driver(s) be "blind", that is, not having flanges that would otherwise jump off the track.

Gus,2-8-0s,2-8-2s and yes 4-6-4s,4-8-4s will go around the 9 3/4" radius curves as will 6 axle locomotives like the SD7,SD9,SD24 SD35 and like size 6 axle GEs simply because they was design that way..

O f course longer wheel base locomotives live the SD40,SD40-2,SD50,SD60,SD70,long 6 axle GEs and larger steam locomotive will require larger radius curves.

However,I reecommand using a larger curves if possible for better overall operation.

IF one is force to use 9 3/4" radius then one should stay with 4 and short 6 axle diesels and nothing bigger then a 4-6-4 steam locomotive.