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"Posted: May 2, 2013 at 9:52 pmResearchers at Ricardo plc are developing a touchless magnetic coupling to tap energy stored in high-speed flywheels.The technology addresses an obvious challenge with conventional flywheel designs: Extracting their energy requires a rotating axle that passes through the wheel&amp;rsquo;s vacuum-sealed enclosure, thus creating friction and possible leakage from the axle bearings.The Ricardo system uses magnetism to transfer energy to and from a completely sealed carbon-fiber flywheel."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.autofieldguide.com/articles/ricardo-tests-leakproof-flywheel-system>