Williams 72 Streamlined Passenger Cars

I have some k line 72` cars and they will not stay on O 31 curves, they roll right over them.

Hi Landon Eshbach, You may want to keep an eye on the trucks, underneath, where they may have their wheels rubbing and wearing away at the insulation on the wires leading into the coach for the lights. I had two wear right through, causing a short. So I removed that consist from my small radius loop.

FrankM

I just ran upstairs to my layout to see if they work to answer your question.  Unfortunately, I don't have building clearance for a full test.  I was able to get one car fully on the curve, and one partially.  The one fully on seemed ok, but it was tight.  I don't know how a full consist will track.  Here are some pics:

Thank you all for your help!  Thankfully I don't need to clear any buildings because they would be running on my outside loop, I'll see if I can find a set of Southern 60' Passenger cars instead!