Originally Posted by lucid
I didn't realize those are functional. Are they?
Well, they're going to do something, that's for sure.
As far as the air over the road is concerned, the bottom of the wheel is at a standstill and the top is moving at twice the speed of the car. I'd think that a curved blade like that moving at 200mph or 300mph would definitely pull air out of the wheel well.
If you look at a picture of the front of a BT92, the air dam that the factory put in remains unchanged, even though the bumper wrapper is different. If Brabham didn't mess with the under-car airflow, they must have thought that BMW did a good job. It's clear that the Brabham engineers did spend a lot of time dealing with aerodynamics - looking at the rear, they changed the exhaust routing to the middle and put a flat panel ahead of the new rear diffuser to cover the hole left behind when the factory mufflers came out.
How's that CFD project coming along?