Originally posted by HSJ
Possible, but obviously this arrangement allows (more) flexing than the Renault arrangement. It's like this: try to compress a metal or carbon fiber rod length-wise, you'll find it almost impossible. But try to bend it... The Renault support relies on resistance to compression, whereas the McL way relies on resistance to bending. Needless to say what the end result is. (Edit: seems like a few people need to brush up on their physics/mechanics. This case is obvious.)
Personally I hate it that teams (not just McL) so blatantly go against the spirit of the rules that say aero parts should not flex.
I agree with your last opinion.
Concerning the Renault centre "stay", I am not so sure ... because such a stay might simply allow the elements on either side to be softer, and hence bend more in their middle. Its quite easy to modify bend in composites of course, by changing the layering techniques, and the materials.
Also, looking at the video, only once though, there seems to be a lot of potential for a twisting element, and such a twist might change the wing quite a lot. In the Little America's Cup, the catamarans raced with vertical solid wings, not sails. And the wings were in several sections, each which rotated independently. The tail sections of the wings had flaps, and they could de-power the wing by either rotating it, or by adjusting the flap (the flaps resembled the flaps on an typical passenger jet).
If the wing can in any way move, then its efficiency will greatly change. It seems to me that in theory, if the wing could be moved by picking up some sideways force from the car, then the wing could be made to work more when in a corner. So if one could direct some energy into some area of the wing or its support or attachment area, then one could have a wing that has more downforce for going around corners, and with less downforce for the maximum speed on the straights. One would also need to get the wing to engage under brakes as well, as I presume that that is really important too.
I well recall Ross Brawn when he was still on leave, saying that the whole F1 cars were moving now. And he was talking about wing flex at the time.
IMO its impossible to stop flex issues by normal static measurement procedures, when the cars are in fact designed to change their aero characteristics only when being driving very hard at high speed with 800 hp being run through them.