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usa4cheer |
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#1
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Newbie ![]() Group: Members Posts: 29 Joined: 16-February 06 From: richmond, va Member No.: 5,592 ![]() |
I am working on my grassroots motorsport challenge car and want to take the windshield out of my car and want to do the mini windscreen. How do you make it???
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skeates |
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#2
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Member ![]() ![]() Group: Members Posts: 218 Joined: 28-February 05 From: Sacramento, ca Member No.: 3,684 Region Association: Northern California ![]() |
Andy - you are correct in saying that the frontal area of the car plays a big point in determining its CD, however....
the curvature of the body in the front plays a very large roll as well. Take for example a Jeep Cherokee vs. a Ferrari Testerosa. The Jeep has a very broad and flat frontal area wich creates a VERY large "stagnation point," meaning that one might as well be trying to run down a windy ravine holding a piece of plywood directly infront of them and perpendicular to the wind. The Testerosa on the other hand takes that plywood and tilts it back so that the airstream from the wind is not directly stopped on account of the plywood, but rather only slowed down. One can test this out on their own by buying a piece of plywood and standing with it in the wind at different orientations (BTW: even if the tilted piece of plywood is longer to make up for the decreased frontal surface area it should still create less drag than the directly perpendicualr piece). This is why the pop-up headlights on the 914 could potentially create more drag than the fender-flairs Peace, Steven |
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