More moving trains, the slower they go

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#1

I have a train game (Self-Driving). However, as I add more of the same train, the trains begin to travel slower. Here is an example. There are 3 trains. If 2 are idle but 1 is moving, it moves at 30 studs per second but when all are moving, I can get as low as 15 studs per second.

Thing is, all trains are suppose to travel at 40 studs per second. I have a GUI which tells me the AssemblyLinearVelocity of a certain part of the train which constantly updates every 1 second. When its moving, it says its at 40, however the train is travelling much slower than that.

The train works like this: All parts are welded to a singular part, which has a bodyVelocity in it.

How do I prevent the trains from moving slower as I add more of them as I am planning on adding 3 more trains

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#2

Are they all connected? If they are, try setting the parts to massless.

If they aren’t, it probably has to do with lag.

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#3

how do i fix this lag

aaaaaaaaaaaaaaaaa

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#4
  1. reduce part count on trains
  2. maybe 3d model the trains instead of making them with parts
#5

If they’re being controlled by scripts, make sure they’re all being controlled from one script, so that you don’t need a bunch of duplicate scripts in each one.

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#6

Fact of the matter is, you’re adding more resistance to the engine by lengthening the train. If you could “orient” the locomotion, you might be adding a body velocity to every car, with enough physical force to exceed the car’s own weight, 1 by 1 maybe

#7

As a train guy, I can confirm Roblox is not the best at handling train physics. Something about having a bunch of different train cars daisy-chained off of each other really starts to make the game chug. How many cars are on your trains? If they have quite a few, I would recommend shortening their lengths if possible, as long as it fits within the boundaries of whatever realism you may be going for.

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