Drag Coefficients

[gasblender37]

Back to square one -- he's looking for the drag coefficients on the various Roadster BODIES.

Thanks Stan,
Your right. I guess I should have asked what are the frontal areas of the various Roadster BODIES in stead of the drag coefficients
Thanks,
Skip

[hotrod]

If you read the text on Dr. Mayfields table page he says the data comes from a computer program called "cartest" available on the web.

I have no info on that program but that should give you a search key to find out more info about the program.
Looks like the source should be here:

http://www.cartestsoftware.com/index.php

[wobblywalrus]

Please post the aero info for the old classic cars and hot rods if you find it. 

[Jack Gifford]

"Cartest" website doesn't even give a hint where the drag coefficient data originates.

[Jack Gifford]

... Please post the aero info for the old classic cars and hot rods if you find it...

The only thing that comes to my mind, is an article one of the engineer-editors (Don Franciso maybe?) wrote in Hot Rod back in '53 or '54 (need to dig it out sometime). He showed a short list of "representative" vehicle types with ballpark drag coefficients. The only one I recall was drop-tank lakesters, at about 0.9 Cd.

[trimmers]

Here are a couple of sites that show some Cd's:

http://en.wikipedia.org/wiki/Automobile_drag_coefficient

The one above is mostly recent street vehicles, but it also shows JCB DieselMax and Goldenrod

There's more at:

http://en.wikipedia.org/wiki/Automotive_aerodynamics

[Jack Gifford]

... http://en.wikipedia.org/wiki/Automobile_drag_coefficient...

A couple things of interest there-
> Typical Formula 1 car 0.7- 1.1
> Summers Brothers' Goldenrod 0.117