The video posted gives a good explanation of what was thought to be going on at first where the air was taken from the airbox then directed down through the shark fin to feed the slot. But at lower speed very little air goes through as the engine sucks most in, "but at high speed you get spillage - and this split air then flows down the shark fin and feeds the slot". Causing the wing to stall.
Wonder if that was the original concept and the nose vent and knee-flap is a development of the idea, as the slot seemed to arrive before the nose vent appeared. Not sure on that tough, need to look at some testing pics. Edit: Nevermind there from the start.
I think the air that flows through the fin and out the slot causes the air to seperate seemlessly from the back of the wing. I suppose this seperated flow caused by the stalling no longer causes much drag or downforce as its now allowed to (relative to the car) continue on in the normal relative direction.
Wonder if that was the original concept and the nose vent and knee-flap is a development of the idea, as the slot seemed to arrive before the nose vent appeared. Not sure on that tough, need to look at some testing pics. Edit: Nevermind there from the start.
I think the air that flows through the fin and out the slot causes the air to seperate seemlessly from the back of the wing. I suppose this seperated flow caused by the stalling no longer causes much drag or downforce as its now allowed to (relative to the car) continue on in the normal relative direction.
