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I heard about that (regenerative braking on a bicycle using flywheel) on the radio, but hadn't see pictures before. He needs the cameraman on a bike to get a better view of this in action. Get the show on the road! In addition to a mobile camera, another rider alongside on a regular bike would help illustrate the difference and add visual interest.
Flywheels work because they're heavy. It might give a boost at the bottom of a climb, but you'll use the stored energy quickly and drag the weight up the rest of the way. Maybe a useful idea, with refinement, in stop and go traffic, level ground, for example most cities.
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