drft_07 said:
no prob, and boro i'm not sure about that rally car wing, lol
"So a decade from now, when you see a pimply faced Kentucky boy gluing a segmented rear wing to the rear hatch of his tired old RSX, you can tell him that idea first appeared at the 2003 Rally Monte Carlo. That was the first race for Subaru's updated aero package, which in addition to the new-generation Impreza nose, includes a rear wing with four vertical slats sticking through it. The design was such a good idea that three races later, in New Zealand, every one of the top cars had a similar wing.
The slats, you can explain, are there to improve high-speed stability by maintaining downforce when driving sideways, and by using the wind to help push the tail back behind the nose.
As the wing pushes through the air, the air following the top surface of the wing gets flung upward. Newton says the air's job, when being pushed up, is to push back down on the wing. On the bottom surface, the opposite happens; with the wing surface suddenly pulling up, air is sucked up to take its place, and when that happens, the air pulls back down on the wing.
Slide into a corner at a 30-degree angle, though, and two things happen. First, the wing is effectively narrower to the air approaching it. Second, the cross section of the wing, carefully designed in the wind tunnel for optimal downforce, gets elongated, taking some of the violence out of the air's journey upward.
Violence is everything when you're dealing with air, so the no-longer optimal cross section of the wing means less downforce.
The slats force the air to straighten out and go across the wing as the team aerodynamicist intended. All the air slamming into the side of those four slats, plus the two end plates, also work to straighten the car out, much like the vertical stabilizer on an airplane.
If he's still standing there, don't expect Kentucky boy to believe you. The wing, he'll slowly and carefully explain, since obviously you don't know much about cars, is there for the ladies."
-Dave Coleman