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Old 02-10-2007, 09:41 PM   #1
CSV_LS1
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Question Info On Underbody Downforce
Can anyone point me in the right direction to learn more on how the underbody of a car can be made to create downforce?

Thanks
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Old 02-10-2007, 09:43 PM   #2
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http://www.autospeed.com/cms/A_107773/article.html

Also www.autospeed.com/A_2455/article.html and www.autospeed.com/A_2456/article.html
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Old 02-10-2007, 09:44 PM   #3
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Google "Ground effects".



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Old 02-10-2007, 09:44 PM   #4
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This might help Mauz:
http://www.symscape.com/blog/secrets_of_diffusers
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Old 02-10-2007, 10:01 PM   #5
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Thanks guys.
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Old 03-10-2007, 12:37 AM   #6
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Defusers.
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Old 03-10-2007, 05:51 AM   #7
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Quote:
Originally Posted by CSV_LS1
Can anyone point me in the right direction to learn more on how the underbody of a car can be made to create downforce?

Thanks
thinking about 9's already????
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Old 03-10-2007, 06:10 AM   #8
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Quote:
Originally Posted by CSV_LS1
Can anyone point me in the right direction to learn more on how the underbody of a car can be made to create downforce?
Thanks
Or the "Pills" the Dr put me on a few months ago , 22kg's in 6 1/2 weeks ,,, :yeees: Lol
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Old 03-10-2007, 10:02 PM   #9
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read competition car downforce and competition car aerodynamics by simon mcbeath. Really great books with fairly simple explanations on how race car aerodynamics work and there is a great section devoted to ground effects and there is also some data and profiles that you can use in the book.

If you have any questions PM me, ill be more than happy to help, i have spent enough time in our wind tunnel with my teams aero geeks to answer your questions.

http://www.amazon.com/Competition-Ca.../dp/1844252302
http://www.amazon.com/Competition-Ca.../dp/1859606628
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Old 04-10-2007, 12:46 PM   #10
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Quote:
Originally Posted by XR8Rob
thinking about 9's already????

I'm trying to work out an anti-gravitational device to lighten the car. And aim for 7's!

Strucnjak,
You have a PM.
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Old 04-10-2007, 04:22 PM   #11
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What sort of car are you thinking of using them on?
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Old 04-10-2007, 05:49 PM   #12
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More of a hobbie atm. With plans to put it towards a 80's model Alfa Romeo GTV project.
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Old 05-10-2007, 05:51 PM   #13
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Originally Posted by CSV_LS1
More of a hobbie atm. With plans to put it towards a 80's model Alfa Romeo GTV project.
Would be a waste of effort on a car like that. Even on single seaters of the 80's such as Australian Formula Twos, they regained the time lost from going from GE to running flat bottoms within a year. The cars were a bit faster with GE sliding skirts, but they are banned even in historics.
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Old 06-10-2007, 02:49 AM   #14
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Originally Posted by xbgs351
Would be a waste of effort on a car like that. Even on single seaters of the 80's such as Australian Formula Twos, they regained the time lost from going from GE to running flat bottoms within a year. The cars were a bit faster with GE sliding skirts, but they are banned even in historics.
Wing basics are flat bottom and a curved top create lift, the higher the air flow the greater the lift, after that you have reynolds numbers for curves and it gets complicated, then there is "ground effect", pressure, turbulence, the shape of your wheel centers and so on.

The funniest thing I have seen in Adelaide is a ricer with a large double spoiler that included equally large vertical "stabilizers" on the ends!
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