Question about KERS
Question about KERS
(OP)
Anyone can verify the energy dissipated in braking an F1 car from 300km/h to 80km/h. Is it as high as 2000 kJ?
Out of this 2000 kJ, how much can be recovered by KERS assuming that there is no limitation by FIA?
Out of this 2000 kJ, how much can be recovered by KERS assuming that there is no limitation by FIA?





RE: Question about KERS
For those speeds the car sheds c. 5.3kJ/kg. With a weight limit of about 600kg, that's 3.2MJ. The limit for teams this year is 0.4MJ.
This is a quote from Max Moseley's recent letter to FOTA on the subject
So Moseley's advisors think it's possible to grab 2/3 of the available kinetic energy, assuming it's all grabbed from a single braking event. But not using existing technology.
- Steve
RE: Question about KERS
I wonder if the KERS system is really worth it considering the extra weight that it carries. moreover the gyroscopic affect introduce by the rotating disc causes some car handling problem. Not to mention the power transmission losses from the KERS to the wheel.
This year races are going to be interesting!!
RE: Question about KERS
Well, here's hoping. I doubt it tho.
Cheers
Greg Locock
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RE: Question about KERS
RE: Question about KERS
The extra weight of the KERS just means less flexibility to place balast where it's best used in order to bring the car up to its minimum weight.
- Steve
RE: Question about KERS
RE: Question about KERS
- Steve
RE: Question about KERS
having to shift away the ballast from the original point will significantly increase the lap time. Moreover, the KERS has to be placed at the back of the car.
RE: Question about KERS
I too doubt if many of the starting cars will have it. If you believe what you read, Ferrari may not. I wonder how long it'll take for all teams to have to adopt the same policy (whatever that is) in order to be competitive? Different approaches to solving the same problem just don't cut it in F1.
- Steve
RE: Question about KERS
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Different approaches to solving the same problem often lead to boring races, because one team managed to obtain a significant advantage.
We'll see.
RE: Question about KERS
- Steve
RE: Question about KERS
RE: Question about KERS
The way to interesting racing is via restritions to aerodynamics.
I know there is some contradiction in my two comments. Who said life was meant to be easy.
Regards
Pat
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RE: Question about KERS
What do you mean by recovered?
You can recover as much energy as you like within the limits of what is available: time spent braking, (eg 15 seconds per lap) and a maximum allowed recovery rate of 60kW, (eg maybe 900KJ per lap), but it would be circuit dependent.
You can extract 400kJ per lap from the KERS system, that is the real limitation imposed in the rules.
So that could be for example a 50% efficient system taking 800kJ per lap of braking and giving 400kJ back usefully, and wasting the other half!