I wanted to do a game map in Unreal Engine with some coal carts that go around a couple of 8 figure tracks. So that might be more tricky because it has more than 1 bend in that type of track. So I need to get that system to try to work. So can I get ahold of that little demo of your Train cart to have a play around with the mover spline system that it uses? Because I don’t yet have a tutorial on how to set up the mover spline system for doing moving small coal carts to get them moving along train tracks.
But I think trying to do it with the physics on in the engine may involve too many other variables to cause the wheels to want to always fall off. You could
also add in more or less KG MASS also to the cart and see what happens to it if using physics, it might cause it to stay more firmly on the tracks or not. So I think to get the cart to turn the wheels on the track without it falling you might need to animate the cart turning slowly all around on the track in an animation program.
But I do remember way back in the days of Red Engine, we used a Keyframe pulley system for moving and rotating things. So for this sort of thing to get a cart to travel and turn around bends, we had to add in all the keyframes first for the whole entire route of the track, the cart would travel along then go back and add in rotation keyframes at each bend with a time delay to tell the cart how quickly to turn around the track.