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Failing to simulate perpetual motion

Unable to simulate perpetual oscillation of a free mass attached to a spring which in itself is attached to a fixed mass. I have disabled damping wherever i could find but the oscillation of the free mass is still getting damped. I am using a physics constraint to simulate the spring and have allowed only linear motion of the free mass along the Z axis. Please help.

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Product Version: UE 4.19
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asked Jun 22 '18 at 01:06 PM in Blueprint Scripting

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