FLYWHEEL HYBRID UPDATE: Flywheel hybrid test vehicle nets 22.4% improvement in fuel economy. “The FHSPV vehicle recovers energy via its rear differential and continuously variable transmission and routes that juice into a flywheel. When the driver reapplies the accelerator pedal, the CVT transfers energy back to the wheels. The flywheel and its associated drive system are installed adjacent to the rear axle, in a space normally occupied by the spare tire. The whole system reportedly weighs in at less than 176 pounds.”