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-   -   cd and frontal area (https://www.rx7club.com/race-car-tech-103/cd-frontal-area-252360/)

bermuda20b 12-17-03 06:38 AM

cd and frontal area
 
Does anyone have the CD and frontal area of a stock 3rd generation? I know this is specific to the FD but there is much more chance of someone know on this forum.

tks

earl

bermuda20b 12-18-03 06:35 AM

what...no one knows?

rockshox 12-18-03 10:52 AM

yamaguchi book says drag is .29 for base and .31 for r1

Wargasm 12-18-03 08:13 PM

I agree with the .29 and .31 figures....

According to "Race Car Aerodynamics", the frontal area is cited as 1.69 AND 1.79 square meters. I am not sure which figure is more accurate.

Brian

reza 12-18-03 08:17 PM

Hey...if we take off the windshield wiper, would that improve the cd ?

Reza

bermuda20b 12-19-03 06:49 AM

It is strange that the r1 is not quite as slippery as the base. I found a website with the data I was looking for. It calculates hp loss at speed and has data for almost all cars.

check it out: http://www.teknett.com/pwp/drmayf/tbls.htm

maxpesce 12-19-03 09:30 AM


Originally posted by bermuda20b
It is strange that the r1 is not quite as slippery as the base. I found a website with the data I was looking for. It calculates hp loss at speed and has data for almost all cars.

check it out: http://www.teknett.com/pwp/drmayf/tbls.htm

The R-1's rear wing is the culprit - it produces lots of DRAG for a Minor increase in downforce. the later (99+) wings produce about the same drag but also much more downforce. :D

VTAOE 12-20-03 10:51 PM


Originally posted by reza
Hey...if we take off the windshield wiper, would that improve the cd ?

Reza

That's pretty funny. You might reduce the Cd by a little bit, but it would be so small that you would never notice the difference as a driver.

- Cody

reza 12-21-03 04:38 AM

I was considering that to reduce weight...and turbulence over hood and windshield. May improve a little but at reduced safety factory in case spill on track from car in front of you...

And you may get contested at SCCA auto-x? No?


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