I am running a modern image DCC layout.
However I have a curve on the layout laid using Peco Flexible track, which I am not sure of the radius. All of my locomotives Hornby Class 60, Class 56 Bachman Class 47, Class 37, Dapol Class 68 all run perfectly well over the curve. However all of my Bachmann Class 66's derail at the same place and whilst they have the same dimensions as the class 60, I am wondering why they all de-rail whilst my Class 60 which is the same dimensions doesn't.
Greatly appreciate any thoughts as always.
Best,
Chris