Live Übertragungen, Live Sport Streams, Fußball, Eishockey, Tennis, Basketball. Motorsports Videos. HOME: Rennteam Uni Stuttgart. Mulsanne's Corner: Race Car Engineering Le Mans 2011. A few weeks ago we posted a really interesting image, taken at the Le Mans Test Day, of Oak Racing's rear wing flap.
We had a think, talked to a bunch of people, and have the answer as to what's going on there. This was the process: Since the 2004 LMP1 regulation changes (and even before that with the LMP900 regulations), the ACO have mandated a gurney on the rear wing flap that is 90 degrees to the plane connecting the top of the wing to the trailing edge (see FIA Drawing 258-8 in Article 3.6.3 of the ACO regulations).
Initially the mandated height was 15 mm, then in 2009 this was raised to 20 mm. 2011 saw the introduction of engine capacity reductions for LMP1 resulting in the loss of about 100 horsepower for the top diesel LMPs.