http://www.cyclingweekly.co.uk/news/product-news/this-electromagnetic-hidden-motor-bike-can-go-100kph-211660
"if the air gap could be closed to “1mm we could increase the efficiency of the bike to over 1000W"
Dibs.
@hippy started
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http://www.cyclingweekly.co.uk/news/product-news/this-electromagnetic-hidden-motor-bike-can-go-100kph-211660