Comments by "Mikko Rantalainen" (@MikkoRantalainen) on "" video.

  1. 9:40 So your power recovery efficiency is 50% and your power output efficiency is 50%. As a result, if you don't charge the spinning disk by pedaling it to full speed your total KERS efficiency is 50% * 50% = 25%. I guess a real KERS system for bicycles must use electricity instead because there you can create "infinite variable gearing" by using different strength magnetic field instead of direct coupling. If your parts can handle the forces and you don't mind shocks, you can improve the efficiency of this setup by using very heavy clutch which should result in less waste to friction of the brake disk surface.
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