McLaren rear wing to be inspected

The slot and rear wing desing of the McLaren MP4-25

The slot and rear wing desing of the McLaren MP4-25

McLaren’s MP4-25 rear wing is to be inspected in Bahrain, following concerns from Red Bull and Ferrari over its legality.

While Ferrari have since been less concerned about the issue, they and Red Bull have asked Charlie Whiting, FIA race director, to closely inspect the rear wing. Christian Horner in particular has seeked clarification over the concept of McLaren’s rear wing.

The issue deals with a slot just above the driver helmet. It feeds air away from the rear wing, which “stalls” the wing at high speed. It reduces drag and still increases downforce. It is believed that the McLaren in faster in a straight line by 6mph because of this innovation.

While McLaren have already invited Charlie Whiting to inspect the innovation, his flight from South America was heavily delayed, so he cancelled the trip to Woking. The car will instead be examined at Bahrain this weekend.

Although Christian Horner is still asking the FIA for clarification, he still believes the innovation is legal:

“There’s a bit of a fuss over McLaren’s rear wing. They have a slot
on it and can pick up a lot of straight-line speed. Basically, if you
stall the wing you take all the drag off it and pick up straight-line
speed. It’s something that’s been done quite a lot over the years,
but with the wing separators you’re not supposed to do that.

I think it will get resolved before the first race. We’ve asked the
FIA for clarification, although I think Ferrari are probably more
excited than we are to be honest. Our question ultimately will be,
‘Is it clever design or is it in breach of the regulations?’ They
must be very confident that it’s legal. I would think it will be
legal.”

McLaren is much less worried about their design, with Martin Whitmarsh saying:

"The wing is different and innovative, yes. But we have been in
contact with Charlie over a period of several months to check that it
complies with regulations. We have been assured that it does."

It’s unclear how important this design is to McLaren’s car, but rest assured that they won’t be winning races any time soon if it’s declared illegal. If it is legal, which it probably is, then we may see another scramble, like last year, with all the teams trying to copy the design.

As I said when the cars were launched, I’m more worried about the diffuser design than this. Still, this design seems to be legal, so we might see another development battle.

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