Head admits to flaws in wind tunnel work.

Patrick Head has admitted that the Williams team has done some serious soul-searching since the disappointing race at Silverstone, and has discovered some anomalies after running a full-size car in the wind tunnel at Grove.

After two good second places at Monaco and the Nurburgring, the team lost its way when it introduced a new aero package at Silverstone, and it now seems that there may have been some miscalculations along the way.

"Certainly, Silverstone is a tricky track," Head told Crash.net, "If you've got an aerodynamic instability problem with your car, which is what we've had, then it's going to be shown up at Silverstone more than anywhere else.

"We've obviously been doing quite a bit of tunnel testing and investigating, and we've slightly changed our approach to set-up. We've learned a bit from running the full-size car in the tunnel against the 60 per cent model, and there are one or two discrepancies which have caused us to set the car slightly differently, so it's looking a bit better."

Mark Webber has indicated that improvements have been made by qualifying sixth at Hockenheim, although the indications are that he is on a lighter fuel load than some of those around him.

"We'll have to see how the race pans out tomorrow," Head confessed, "It obviously depends on how much fuel people have got on board. We've had two very bad grands prix, but Williams is a strong team. I'm sure that we're more than capable of sorting out the problems that we've had in the last two races, and I'm sure that we will get better as the season goes on."