They retain the item until the next time they are in the saddle, and fling it behind them, converting the momentum of the item into forward thrust. It's worth about 7 to 10 watts.
@nick_h. started
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They retain the item until the next time they are in the saddle, and fling it behind them, converting the momentum of the item into forward thrust. It's worth about 7 to 10 watts.