Arthur Craft wrote:To stay on topic, eventhough the point you made is coherent, I'm not entirely sure that more rake definitely proves how successfull a team(in this case W04) is sealing the diffuser. It might be, but I'm just not sure yet and it would be nice if some F1 engineer confirmed it in any of those, quite rare unfortunately, technical interviews
Of course it is guessing from our part. We are a technical forum, but we don't have any data on it. Teams always have run a bit rake, as it is beneficial. The problem though is that if you run too much you'll get tyre squirt and airflow from the sides of the car interfering with the airflow coming from underneath the car, removing downforce instead of adding to it. In the "ground effect" era they indeed had the best solution, running skirts. That is forbidden and so with no bodywork allowed teams have to rely on the exhaust gasses, not an optimal solution at all, but they take what they have. I know you know all of this, but I think the exhaust gasses play a more prominent role to get more downforce. Teams are looking to extract the maximum out of difficult placed exhausts; I believe the more they can extract and can get under the floor, the higher the optical point lies of optimal rake. Of course I am basing this on pure reasoning; I would even piss off Briatore in order to get a hand onto the data.