Can anyone confirm the 'closed car only' ruling for 2010 onwards? I had a feeling that the ACO has introduced rules that all LMP1 from 2010 had to closed cars, but Audi's decision to make an open top has me baffled!
Timbit, you are quite right that the original rules specified that
ALL LMP1 cars were to be of the closed type construction from 2010..... however that rule has now been reversed, (about April IIRC) after some protests from Audi and perhaps other manufacturers..... The ACO will now
NOT enforce the closed LMP1 prototypes rules from 2010 onward. Dr. Ullrich of Audi does not like closed prototypes, and most new prototypes chassis/bodies being made today do not comply to the 2010 rules and would be unusable.
My belief is that it is part of the overall rush of aero style accidents that we had in the first 6 months of this year, or to put it differently, rather than set the next few years in concrete at a time when it is looking at a new overall aero reduction when the 2011 aero / body rules are set in stone. That is to say minimise the sweeping changes to one major change rather than a bit here and a bit there as a sort of band aid approach.
ACO statement from mid year ..........after Hideki Noda suffered the sixth aerial accident for a prototype car since March during Wednesday's qualifying session, and the ACO believes that reducing corner speeds will solve the problem.
"(Aerial accidents) are a new phenomenon, as the regulations have not changed for this year," said ACO sporting director Daniel Poissenot.
"But I think we will have a different position for next year given the urgency of this. We will examine it.
"We need to look at the performance of the cars. We want to reduce downforce, which in turn will reduce corner speeds. All aero devices on the bottom of the cars will be banned for 2009."
The organisers of the race also outlined more plans to reduce the speed of the cars over the next couple of years with further aerodynamics reductions for 2010.
"We will do a lot of work for 2010 over the winter, but we want stability of three or four years, so there are no bad surprises for anyone. Current cars will still be allowed, but we will work to balance their performance with the new ones."There is or has been for a while however, talk of LMP! 'Evo'.-source: Automobile magazine, June 2008
"...a new top category tenatively called LMP1 Evo. In essence, this is the merger of today's LMP1 and GT1 classes, with two goals in mind. The first goal is to reduce speeds down to less than the 230+kph lap average exceeded in last year's twenty-four-hour race. The second is to shift appearances from fendered formula cars to racy road cars. ..."
Corvette C7R as seen in the June 2008 edition of Automobile Magazine:(Their 'Photoshop' I assume)
The actual engine rules for the Le Mans 24hr 2011 race have been released in the last week or so.....
2011 Le Mans‐24 Hours
Regulations►Engines
LM P1DieselDiesel 3.7‐litre 8 cylinders with twin turbos
520 bhp
Petrol3‐4 litre 8 cylinders normally aspirated
900 kgs
2‐litre 6 cylinders single turbo
LM P2DieselSeries production 4‐litre 8 cylinders (with original supercharging system)
420 bhp
900 kgs
PetrolSeries production 4‐litre based on 2010 GT2
Strictly series production 4.5‐litre (according to the results obtained in 2009)
►Hybrid systemsThe ACO wants to give manufacturers the greatest possible freedom to develop and use such systems while taking certain measures to control them.
Energy recovery systems will be free, provided they respect the following rules:-
Recovery of energy from the brakes on the 4 wheels or from the heat of the exhaust.
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Only the rear wheels can be used to drive the vehicle.
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Electric systems are allowed only to recover energy from the brakes.
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Energy can only be stocked in the form of electricity.
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The car’s minimum weight will be identical to that of the other LM P1s using conventional engine technology (petrol or diesel): 900 kgs.
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The internal combustion engine and the electric motor must be controlled by the driver using the accelerator pedal (push to pass buttons forbidden).
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The quantity of usable energy stocked on board the vehicle must not exceed 1 MJ.
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Installation of systems enabling the power to be controlled at the entry and exit of engines/generators and the energy dissipated on a lap of the circuit at the exit of the motor/generator.
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The ACO will impose its own safety regulations.
http://www.lemans.org/sport/sport/reglements/ressources/2009/auto/reglement_2011_moteur_hybride_gb.pdf