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At the moment, the energy produced is small, Crane says, but its making a difference. Greg Kremer, a mechanical engineer at Ohio University who works on human-powered vehicles, writes that although there have been some technological advancements in efficiency, output electricity is always limited by human input, the bikes power requirements, and any energy losses of the power-generating equipment
The current helmet logo first appeared in 1979
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I own 4 of them but I'm really impressed with the 7' cranking stick
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