Would relative testing show the same results (improvement or lack there of)
weather in a wind tunnel or on the coast down?
JB
----- Original Message -----
From: "DrMayf" <drmayf@teknett.com>
To: "List Land Speed" <land-speed@autox.team.net>
Sent: Tuesday, January 28, 2003 11:04 AM
Subject: Re: Aero Testing
> If doing a coast down, what you are goig to get is a relative Cd so to
> speak. You list the vehicle configuration and when youchange that config
you
> make another coast down to see whether or not that helped. I can extract
> rolling resistance to a point but have to know car weight on the front
axle
> and rear. The we can assume losses for tranny, rear end, inertia, etc to
get
> a truer Cd. But the result is still the same. for comparative purposes.
Lots
> of work and testing for maybe nothing.
>
> mayf
> ----- Original Message -----
> From: "John Beckett" <landspeedracer@msn.com>
> To: "DrMayf" <drmayf@teknett.com>; "List Land Speed"
> <land-speed@autox.team.net>
> Sent: Monday, January 27, 2003 6:36 PM
> Subject: Re: Aero Testing
>
>
> > OK here's another thought to factor in to the coast down. How big a
factor
> > is the drag from the brakes, drive line and rolling resistance. Guess it
> > would only be important if comparing coast down Cd to a wind tunnel Cd.
> >
> > JB
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/// what is needed. It isn't that difficult, folks.
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