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Originally Posted by PorscheFanNo1
Yeah, youre guessing :P
The undertray of modern LMP cars generates downforce when at an angle (going sideways). With a flat bottom the undertray dont generate any downforce, but the air going over the car will generate lift, so it will take off. The downfroce from the undertray of moderns LMP cars when going sideways should be more then the lift created byt he air going over the car, so it should stan on the ground. But as seen when the cars get a little help from the grass it can still take off.
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Actually both generate downforce in yaw. But as that yaw angle passes a certain angle the downforce drops and eventually will turn to lift (at around 35 degrees of yaw for a pre-'04 reg car, around 70 for a LMP'04 reg car) , especially if the car's roll isn't 0 degrees (add just a few degrees of roll into the windward side of the yaw and things change rather drastically). And the one thing that is missing in both Ortelli's and Capello's accident is tarmac induced friction (from the tire-road relationship) that would have further reduced the speed.