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6 Jun 2005, 10:51 (Ref:1321211) | #1 | |
Rookie
Join Date: Jul 2004
Posts: 22
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Downforce
As I now have a car with slicks and wings, can someone enlighten me a bit (excuse my ignorance!)....I notice a few people I race against have filled in all gaps around the front splitters and other downforce aids.....how much difference does it really make to do this....is it noticeable when diriving the car or will a bit of turbulence not matter that much?
I dirve radical Prosport, if that helps anyone! Thanks |
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6 Jun 2005, 11:00 (Ref:1321218) | #2 | ||
Veteran
Join Date: May 2005
Posts: 947
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This is the category you are talking about?? And they have filled all gaps around the splitters, does this mean they have moulded a new front spliter, or just filled it with what?? And what other downforce aids?? Generating the necessary downforce is concentrated in three specific areas of the car. 1. Front wing assembly (in your case splitter) 2. Chassis 3. Rear wing assembly Downforce is necessary for maintaining speed through the corners Quote:
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6 Jun 2005, 12:14 (Ref:1321281) | #3 | ||
Racer
Join Date: May 2005
Posts: 262
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Sorry to steal the thread, any good books you can recommend?
Lots around but, some are very outdated. Rich |
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6 Jun 2005, 12:24 (Ref:1321292) | #4 | ||
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Quote:
Aerodynamics for Racing & Performance Cars. UK. are two that spring to mind. |
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6 Jun 2005, 15:22 (Ref:1321450) | #5 | |
Rookie
Join Date: Jul 2004
Posts: 22
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Thanks for the reply Oaks, that is the car.
They haven't moulded a new front splitter, but have filled all gaps in the bodywork and the small wings on the front corners with I guess silicon to smooth the airflow. I was also wondering what I could do to smooth the flow under the front and rear of the car as there are some large gaps, particularly under the front. I thought of constructing some form of ply-wood until to fit under front spoiler to meet up with the floortray of the car. I'll try to get hold of the books you mentioned as this is a whole noew area that I have no understanding of! Thanks again for your help. |
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6 Jun 2005, 15:41 (Ref:1321467) | #6 | |||
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Quote:
The following piece of an article i just read should help you. Quote:
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6 Jun 2005, 16:04 (Ref:1321483) | #7 | ||
Racer
Join Date: May 2005
Posts: 262
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Thanks for the titles, Amzon UK stocks both
Competition Car Downforce Aerodynamics: For Racing and Performance Cars http://www.indiacar.com/index2.asp?p...s/dirtyair.htm Jhawkins this may be useful for a little understanding in the meantime until the arrive. |
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"I wonder what the fastest anybodys been in the Eurotunel train?" |
6 Jun 2005, 16:08 (Ref:1321488) | #8 | ||
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Quote:
If you wanted a quick read on what aero can do. Just go here http://www.ceintl.com/nov2004/images...20dodging2.pdf |
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7 Jun 2005, 08:14 (Ref:1322119) | #9 | |
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Join Date: Jul 2004
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Thanks guys.....I can see a lot of reading and head scratching coming on! I really appreciate your help.
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7 Jun 2005, 08:22 (Ref:1322125) | #10 | ||
Racer
Join Date: May 2004
Posts: 376
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The radical comes with setup instructions regarding ride heights .The ride heights are measured under the rear bulkhead(in front of the engine) and front bulkhead(below drivers knees) .Interestingly the floor of the car is a bit rised under the drivers knees ,so the measured ride height front is bigger front than rear.
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7 Jun 2005, 08:28 (Ref:1322127) | #11 | ||
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Quote:
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7 Jun 2005, 10:57 (Ref:1322228) | #12 | ||
Racer
Join Date: May 2005
Posts: 262
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Some pictures of the areas might be an idea for more suggestions.
www.photobucket.com will store them and give you a link to put the on here. |
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"I wonder what the fastest anybodys been in the Eurotunel train?" |
8 Jun 2005, 03:49 (Ref:1322883) | #13 | |
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There are two options you can go for here, or you can try and mould them into one.
A perfect example of the venturi affect is taking place under this DTM Notice that he does not even have a front splitter as the lower portion of the spoiler curves back in towards the car, instead of pointing outwards. This way they could maximize the venturi effect underneath the front of the vehicle. The front spoiler region of the car forms a "mini ground-effect tunnel". In the "throat" region of the venturi, the air flow speeds up and hence the pressure goes down. This creates downforce. The longer the throat region is, the more downforce that can be created. Or you can try and get your downforce from a front splitter seen above. You can go into a long haul of maths and terminology, but in the end they basically say the bigger the splitter is, the more downforce it can create. |
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11 Jun 2005, 15:47 (Ref:1325670) | #14 | |
Racer
Join Date: Dec 2004
Posts: 153
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J&P Rose used a rake of only 10 mm front to rear . I got that off Julian when he worked for Paul I dont know where they measured it from I thought they had a flat bottom on the radicals but that all I know
Best advise is read the books probably a couple is better see if there are varying views Downforce is very interesting stuff .Get them as low as possible at the front and keep them there i.e zero droop and stiff springs . We run our f3 reynard at about 12mm rake and its stiff with zero droop front and rear .That works best on the lap speed . In the long run any air has to be speeded up underneath and then re introduced at the rear ( diffuseses job) at the same time as running air under the bottom of the wing quicker( low pressure) and thus forces car to the road Mr Oaksnaff knows plenty. I have not dissagreed with anything that they said .You need to read the books . make your own mind up . Look at F1 shapes they all have different shapes to get the same effect .It makes you realize why saloon cars are not very sure footed above 100 mph |
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