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least common denominator
Join Date: Aug 2001
Location: San Pedro,CA
Posts: 22,506
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F1 Tech Question
This has been bugging me...
Can someone tell me what those CF drum like structures are that the wheels bolt over? (And don't tell me F1 is going over to drum brakes!  )
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Gary Fisher 29er 2019 Kia Stinger 2.0t gone  1995 Miata Sold 1984 944 Sold I am not lost for I know where I am, however where I am is lost. - Winnie the poo. |
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02-09-2008, 09:20 AM
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Green Skull 006
Join Date: May 2002
Location: Rhode Island
Posts: 2,040
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I think that they contain and direct all of the air that comes into the duct through the assembly to cool it. It's also why you see the huge clouds of dust shoot out of the wheels under braking at the end of the straights.
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S Reg 823 R Gruppe 246 1955 pre-A Carrera Speedster...x 1974 leichtbau..."Sascha" "It makes me sad. Our cars were meant to be driven, not polished" - Ferry Porsche while surveying a PCA Parade concours field. |
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02-09-2008, 10:50 AM
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Senior Member
Join Date: Jun 2000
Location: N. Phoenix AZ USA
Posts: 28,943
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Good question. Have wondered that myself...
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2013 Jag XF, 2002 Dodge Ram 2500 Cummins (the workhorse), 1992 Jaguar XJ S-3 V-12 VDP (one of only 100 examples made), 1969 Jaguar XJ (been in the family since new), 1985 911 Targa backdated to 1973 RS specs with a 3.6 shoehorned in the back, 1959 Austin Healey Sprite (former SCCA H-Prod), 1995 BMW R1100RSL, 1971 & '72 BMW R75/5 "Toaster," Ural Tourist w/sidecar, 1949 Aeronca Sedan / QB |
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02-09-2008, 11:13 AM
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Registered
Join Date: Aug 2007
Location: Kenbridge VA
Posts: 4,270
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I thought that they offered some protection for the fragile rotors along with cooling.
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Peppy 2011 BMW 335d 1988 Targa 3.4  2001 Jetta TDI dead 1982 Chevette Diesel SOLD
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02-09-2008, 11:16 AM
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another round please
Join Date: Sep 2004
Location: Carmel In.
Posts: 4,452
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They keep MOST of the cool air that comes INTO the brakes from going out. It's kind of a chamber of sorts, a cool coller. Less air escapes. At least thats what I think I read some time ago.
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Getting old is not for wimps. |
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02-09-2008, 11:39 AM
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Gon fix it with me hammer
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they actually size those things up according to the track they use
smaller for low brake tracks such as Spa bigger for tracks like Monaco they take up 1.5% of the total drag on the car, so it's a big penalty if they go to big there's also the problem of cold ceramic brakes if they have to much cooling on the long highspeed tracks...
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Stijn Vandamme EX911STARGA73EX92477EX94484EX944S8890MPHPINBALLMACHINEAKAEX987C2007 BIMDIESELBMW116D2019 |
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02-09-2008, 11:43 AM
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Registered
Join Date: Feb 2000
Location: Dallas, TX
Posts: 4,612
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I think the drums also serve to reduce aero drag by filling in the void inside the wheel, kind of like the covers they put on the outside of the wheel.
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Neil '73 911S targa |
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02-09-2008, 02:02 PM
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BimForce the Third, Esquire
