I'm surprised nobody's mentioned Formula 1 yet. Next season will see the introduction of the Kinetic Energy Recovery System (KERS). Basically it's 40kg flywheel

I'm surprised nobody's mentioned Formula 1 yet. Next season will see the introduction of the Kinetic Energy Recovery System (KERS). Basically it's 40kg flywheel capable of storing 60kW of energy recovered from braking that will allow for 6.5 seconds of additional acceleration. This is an attempt to make overtaking a more frequent and exciting proposition. Regulations allow for electrical or mechanical implementations. BMW chose electrical and has already seen how dangerous it can be: http://www.youtube.com/watch?v=fzaQ-t1ojPU http://www.youtube.com/watch?v=fzaQ-t1ojPU http://www.formula1.com/news/headlines/2008/7/8086.html http://www.formula1.com/news/headlines/2008/7/8086.html