As an avid fan of formula one, it is always interesting for me to see the different kinds of technologies which teams develop, just to get that extra hundreth of a second per lap time out of the car. One recent area for development which has been widely talked about and is on the drawing board is something which is called "KERNS" or "Kinetic Energy Recovery System". With this kinetic energy is somehow "stored" whilst the car undergoes braking and then the driver can release this stored energy by pressing a "boost" button on the wheel, which will give him anything between 60-100bhp extra for a short period of time on the main straight. Does anyone have any idea how such a system is likely to work ?