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 2Likes
10-01-2009, 07:24 PM
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Senior Club Cobra Member
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Join Date: Jul 2002
Cobra Make, Engine:
Posts: 15,712
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Not Ranked
Just to help keep a VERY complex subject simple, I figured a Miata would be a good comparison. Similiar size, weight, shape with smaller frontal area.
BUT Patrickt brought up an interesting comparison with the Lambo, which apparently has very little frontal area and yet a CD similiar to a Cobra??
Which reminds me of the testing Shelby did when he first started working on the Ford GT-40. Overheating, terrible drag, low top speed. Due mostly, as I recall, to the many "air scoops" here there and everywhere. Which may be the Lambo's problem, big ass air scoops.
Thats some impressive work Greg!
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10-01-2009, 07:43 PM
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CC Member
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Join Date: Feb 2006
Location: Gilroy,
CA
Cobra Make, Engine: SPF 2291, Whipple Blown & Injected 4V ModMotor
Posts: 2,741
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Not Ranked
Cobra Drag Coefficient
Here is some data out of the Bosch Automotive Handboook
We are probably pretty close to the entry for "Typical Roadster" with a Cd of 0.55
Sooo, that puts us in about the same class as a bus! Good news is we are not as bad as a truck.
Ed
__________________
Help them do what they would have done if they had known what they could do.
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10-01-2009, 08:32 PM
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Stolen Avitar
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Join Date: Oct 2004
Location: Brunswick,
GA
Cobra Make, Engine: BDR 1311 428PI
Posts: 3,044
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Not Ranked
Quote:
Originally Posted by eschaider
Good news is we are not as bad as a truck.
Ed
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WoooHooo!!!!! 
BTW, if memory serves, that huge CD for the Countach was when it was fitted with the huge rear wing not shown in the above pic.
Steve |
10-03-2009, 09:00 AM
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CC Member
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Join Date: Nov 2001
Location: Windham,,
Me
Cobra Make, Engine:
Posts: 1,590
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Not Ranked
Put enough horsepower to a brick it and becomes very fast.
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10-03-2009, 12:15 PM
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Senior Club Cobra Member
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Join Date: Jun 2007
Location: Covington,
wa
Cobra Make, Engine: Superformance # 532, 466 BB, 560HP
Posts: 3,029
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Not Ranked
Quote:
Originally Posted by mdross1
Put enough horsepower to a brick it and becomes very fast.
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That defines the F4 fighter too. 
__________________
John Hall
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10-02-2009, 09:11 AM
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CC Member
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Join Date: Jan 2001
Location: Post Falls,
ID
Cobra Make, Engine: Everett-Morrison
Posts: 111
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Not Ranked
just to stir up the pot a bit.........
I am by no means an engineer, but based on what all of you have said, which BTW, sounds very credible and logical to me, I just couldn't help thinking of Dick Smith's car reportedly going 198mph. I just find it too difficult to accept and believe that Dick was actually able to drive his car that fast.
As mentioned, if it takes a substantial amount of hp just going 110mph, and at 160mph, the Cobra, due to its shape, is hitting the aerodynamic wall, then how could it be possible, back in the 60's, that Dick could go faster by almost another 40mph?? Morris Clement in his well engineered car with air splitter, wing, flat belly pan, and tons of hp, I haven't heard that even he has been able to reach the speeds claimed by Smith. Something just doesn't add up.
I'm not trying to take anything away from Dick, but physics is physics. If I'm missing something important facts, I'd like to know.
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