And also it increases the front ride height , which with rear DRS leads to decreased dragraymondu999 wrote:The Merc duct is supposedly reducing front downforce; so that both front AND rear downforce is reduced. The drag help is minimal.
But what happens is there are some corners where you can take flat out even with DRS on. Example is the last corner in Catalunya last year for the Red Bull. But sometimes there are corners where you could technically still go through the corner flat out; but because the front still has so much grip; you can't turn the car enough to make the corner without destabilising the rear. By reducing the front downforce as well you're restoring that balance.
Plus it gives them option to run low ride heights
it is also speculated that they also have passive Fwing duct, which in a race will increase the front ride height...allowing them to run lower ride height