uhmm. I must be challenged. how does the spinning wheel, you know, the wheel moving the car down the road, its uhhm Round. how is this an aerodynamic drag again? May as well use jets ground engine covers in flight for planes to do the same effect. maybe save some fuel that way...how hot do the unnecessary brembos get now...
@bdon: I know you wrote this yesterday and I really hope you come back and look at it.
First, the Magnus effect: a moving surface will have a layer of air adhere to it, so a mass of air moves along with it. This effectively makes the tire seem much bigger in the face of the air moving past it - and it's adhered layer. The fender skirts experience this same effect but to a lesser degree - smooth steel is slipperier, aerodynamically speaking, than a tire sidewall. And even so, the entire skirt is moving at the same velocity as the rest of the car body, while the different parts of the tire are, compared to the air, at rest (at the bottom) all the way to 2x car speed at the top of the tire. This induces a lot more drag. Then of course there's the wheelwell gap all the way around the tire, which induces a lot of turbulence. Turbulence is a lot of drag - anywhere you're generating turbulence, you're burning fuel and wasting power to do nothing more than stir the air.
Great lead-in, Wes! I even read that out loud to my spousal unit-- concisely captures the essence of this situation! What are you guys drinking over there? Yeah, I know, "beer," but what kind?
If FromaBuick6 has to watch one more Chevy commercial, he's going to punch Howie Long in the face was starred
If FromaBuick6 has to watch one more Chevy commercial, he's going to punch Howie Long in the face was unstarred
09/18/09
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Fender skirts properly done.
09/17/09
09/18/09
First, the Magnus effect: a moving surface will have a layer of air adhere to it, so a mass of air moves along with it. This effectively makes the tire seem much bigger in the face of the air moving past it - and it's adhered layer. The fender skirts experience this same effect but to a lesser degree - smooth steel is slipperier, aerodynamically speaking, than a tire sidewall. And even so, the entire skirt is moving at the same velocity as the rest of the car body, while the different parts of the tire are, compared to the air, at rest (at the bottom) all the way to 2x car speed at the top of the tire. This induces a lot more drag. Then of course there's the wheelwell gap all the way around the tire, which induces a lot of turbulence. Turbulence is a lot of drag - anywhere you're generating turbulence, you're burning fuel and wasting power to do nothing more than stir the air.
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And people say Mustang tuners are garish...
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How much speed can a speed spad add if a speed spad can add speed?
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/sarcasm
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09/17/09
Introducing the Brabus 800CV