David Dymaxion wrote:
> The U.S. gov't EPA databases have some really neat information, like
> the weight and Cd*A, as well as fuel economy.
>
> Unfortunately, the newer databases only have fuel economy info, but
> 1996 and earlier there is alot of neat stuff.
>
> http://www.fueleconomy.gov/feg/download.shtml
>
> ----- Original Message ----
> From: "
[email protected]" <
[email protected]>
> To:
[email protected]
> Sent: Friday, September 21, 2007 4:26:16 AM
> Subject: Re: [EVDL] Drag coefficient, frontal area data?
>
> I'm interested in this too so I propose a team effort -
> if you can find front and side drawings or pics with scale,
> I'll calculate A and approximate Cd (assuming car is 2d extrusion)
> and put it up at
> http://imby.biz/saymoo/EvdlGems/DragAndRollingCoefficients
> or if u like the nerd stuff I'll find the pics and you do the calcs.
>
>> I was hoping for something comprehensive, a database where I could
>> look up any
>> mass-produced vehicle including OEM body style variants up to the
>> current year. (The second list, while longer, only states Cd values,
>> which aren't very useful without frontal area).
>> I'll assume such a resource doesn't exist. There are descriptions
>> online
>> for using the deceleration curve of a vehicle to determine drag values
>> (and, interestingly, to separate aerodynamic drag from rolling
>> resistance), but these require that I actually get to drive the
>> vehicles, on an otherwise vacant road. Maybe I can rent or do test
>> drives...
>> Makes me curious though ... some vehicle reviews do contain this kind
>> of
>> data -- where do they get it? If it's not published somewhere, do they
>> call the manufacturer? Surely a car review site isn't going to do its
>> own wind tunnel tests....?
>
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