McLaren's problems have showed no signs of going away, and the French Grand Prix weekend was its least competitive performance of the season so far, with both drivers eliminated in Q1.
After qualifying, it was very interesting to hear team boss Zak Brown explaining that McLaren could not identify its problem in the windtunnel even though it can see the problem on track.
Windtunnels are just a simple tool to prove your ideas. You can't see anything, so you have to believe they represent reality as closely as possible. The Toyota Motorsport facility in Cologne that McLaren uses for aerodynamic testing is one of the best, and the team isn't blaming the windtunnel. After all, a windtunnel is simply equipment that produces a vast set of numbers.