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Comment on The Curious Design of Skateboard Trucks

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Not sure about dividing the force compressing the bushings into Fuseful and Fwasted. I may be misunderstanding, but it seems the Fwasted vector component just gets some mechanical advantage in compressing the bushing, and disadvantage on the restoring force.

But that actually balances out fine. Is the claim that some of the work in compressing the bushing is never given back in energy restoring the truck to neutral?

No energy is lost. Imagine a spring installed at an angle between 2 plates being pressed together (the middle bit of a 'Z'). The spring has to be stronger/beefier than a spring installed vertically (middle bit of an 'I'). It may wear out faster.

Maybe it's not possible to manufacture a squishier bushing so the mechanical advantage/disadvantage is needed.

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