In the continued tested of my new layout, I have been trying out several of the locomotives I have purchased over the past couple of years. Some are post-war Lionel, some are K-Line and also RMT. When the K-Line and RMT locomotives pass over an O-Line O72 switch track, they will stall. Unless I move the loco by hand, it will not regain power. You can imagine my dissapointment.
The RMT locos I have tested are a pair of Beefs (tethered together) and the #51 Navy switcher Beep. The Beefs fair slightly better if I run them faster, but I don't care to.
The K-line locos are the box cab and the RDC set. Both stall on the switch track. Again, the RDC set is slightly better, perhaps due to it's length.
On the other hand, my little #41 and 51 switchers run just fine. I figure it because they do not have traction tires to interrupt any power.
The rails are clean on the switch tracks.