Getting a parts velocity relative to its orientation

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1 
local function UpdateForce()
	Part.VectorForce.Force = ((TargetVelocity - Part.Velocity)) * mass
	print(TargetVelocity.X .. " - " .. Part.Velocity.X .. " = " .. TargetVelocity.X - Part.Velocity.X)
end

This function actively corrects the value of a vectorforce to set a constant speed in a relaive axis, the problem is that since the value is not relative it accelerates infinitely,

2

In my testing of your code it works perfectly
I cant think of any reason it wouldnt work other than an external force affecting it

3

Have you tried turning the part 90 degrees in the y axis though?

4

Oh just set the RelativeTo property of the VectorForce to world

5

No, i need it to be relative to attachment0
My problems are with this part in particula, for which I need to get the part’s velocity relative to it’s orientation so the script subtracts force when it is going over the desired speed:

TargetVelocity - Part.Velocity
6

Part.Velocity is relative to world space

Do you want targetVelocity to be relative to the object?

7

TargetVelocity is setting the vectorforce’s force, so it is relative, I want to subtratct the current relative velocity so it does not accelerate more than it should.

8

You could try utilizing VectorToObjectSpace

workspace.Part.CFrame:VectorToObjectSpace(workspace.Part.Velocity)
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