Connecting train cars with springconstraint causes very glitchy physics

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1

I’m trying to make a cart ride and I want a locomotive and a generator cart, like in cart ride around nothing, but I want them to be connected by a spring, because I think it would be more fun. However, when I tried this, the carts started teleporting and acting very weird.

Here’s a video in which I try to drive the cart a bit on a long empty track, but the carts keep glitching out, as well as a few things I’ve fixed/checked (network owners, low friction):

I have no idea what causes the glitches. I tried giving the spring a strength limit, but it didn’t help.

2

definitely something to do with the mass of the carts

3

I’m not sure what you mean. I’ve tried way lighter carts and way heavier carts and they still have the exact same problem

4

What I recommend doing is:

Making a stability part. This can simply be done by having a part under the rail and in-between the rails, then weld these to the train.

Artists rendition (ik I’m a professional)

Screenshot_20250525-112928.Keep Notes
Screenshot_20250525-112928.Keep Notes1080×1308 14.2 KB

Red being the train, blue the rails, and green the safety part.

If you want sometimes for it to pop off, make it so the safety part is disabled or smaller.

5

If this is still not resolved, combine multiple carts into the same model or set NetworkOwnership for the rear cart as well.

6

The rear car already has networkownership set to the driver. I have since given up on the idea. Also, @RocketSlither’s solution doesn’t work because the whole point of Roblox cart rides (which were the genre I was trying to make) is to try not to fall off because you went too fast at a turn.
Thank you for your help!