@PRR Steam posted:
I’m going to respectfully disagree here and let this video speak for itself. This is a Ross 072/054 curve switch. I have run hundreds of pieces of rolling stock through this switch with no derailments. I’m not sure exactly what’s causing this but it appears to be a combination of the fixed couplers and narrower wheels. I’ve sent this video to Lionel also.
Your video is very reminiscent of my Friendship PS-1s going through an 072 S-curve. They pull each other off the track with 100% repeatability. It’s not just a coupler issue.