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I don’t think there’s a whole lot of room for improvement there.

Regen recoups about 80% of the kinetic energy, and it is already up close to the theoretical physical limit without switching to exotic materials.

Cd will never be the dominating factor at speeds which do not produce significant aerodynamic drag.

> Cd will never be the dominating factor at speeds which do not produce significant aerodynamic drag

That helped it sink in, thank you

Remember also that tires (deformation) and the like sap energy too