4 ms·
Previous HN discussion: https://news.ycombinator.com/item?id=17494226 https://news.ycombinator.com/item?id=17494226 Can't imagine this catching on. Ordinary ch
by makomk 7y ago
Previous HN discussion: https://news.ycombinator.com/item?id=17494226 https://news.ycombinator.com/item?id=17494226
Can't imagine this catching on. Ordinary chains are already really efficient, and the efficiency of this will only last until dirt gets into all those tiny little open bearings. (Sealed bearings would eat into the efficiency gains.)
- jacobush 7y agoSomething which would be cool would be a electric hybrid drive. Electric generator + electric motor.
- nradov 7y agoYou can already buy electric bicycles. But regenerative braking on such a light vehicle doesn't gain enough to be worth the extra weight.
- deleted 7y ago[deleted]
- braythwayt 7y agoI know someone who uses an electric cargo bike. It has regenerative braking, and perhaps the extra mass of carrying loads is what makes it practical. I believe it uses the Bionx system, which uses a direct hub drive. The company is lo longer in business, IIRC.
- jacobush 7y agoI don't know if it's feasible, but I was thinking motor <-- cabling --> crankshaft with integrated generator Not necessarily any battery, but the electric cabling replacing chains.
- throwaway9d0291 7y agoYou can buy e-bikes with regenerative braking. They don't advertise it much but as far as I know, all Stromer's [0] e-bikes have it. [0]: https://www.stromerbike.com/en_INT.html https://www.stromerbike.com/en_INT.html
- samstave 7y agoPut the shaft in a tube that is removable and cleanable. Jeasus guys - engineering can solve ALL of these issues.