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Mazda Rotary Club

General => General Technical => Topic started by: BlitzBoy on March 05, 2004, 04:14:44 PM

Title: CDA of the FD3S rx7?
Post by: BlitzBoy on March 05, 2004, 04:14:44 PM
anyone know this value? i need this to input into a performance meter
Title: CDA of the FD3S rx7?
Post by: kevint on March 05, 2004, 04:24:11 PM
Is that the drag coefficient?  In which case it is 0.31 for a stock car with older style spoiler.

Kevin
Title: CDA of the FD3S rx7?
Post by: BlitzBoy on March 05, 2004, 04:25:50 PM
Not Quite Kevin, CD and CDa are different things

Someone must know
Title: CDA of the FD3S rx7?
Post by: J4P RX on March 05, 2004, 04:27:11 PM
CDa is Drag Coeff multiplyed by frontal area if I remember corectly.  I spent ages trying to find frontal area with little sucess.  I recon you want it for similar reasons to me :D

Cheers
Lee
Title: CDA of the FD3S rx7?
Post by: BlitzBoy on March 05, 2004, 04:29:53 PM
arrrrggggh this is soo Frustrating Lee lol
Title: CDA of the FD3S rx7?
Post by: kevint on March 06, 2004, 10:51:41 AM
Ok Guys:

Cd: 0.31
Frontal area (A): 1.79 sq meters, 19.26 sq feet
Cd x A: 0.55 sq meters, 5.98 sq feet

Source p71, The Mazda RX-7: Mazda\'s Legendary Sports Car
Yamaguchi & Dinkel

Kevin
Title: CDA of the FD3S rx7?
Post by: BlitzBoy on March 06, 2004, 11:33:06 AM
nice one kevin:)
Title: CDA of the FD3S rx7?
Post by: g11ary on March 06, 2004, 11:36:07 AM
what the fduk would you want to know the cda of a car for.
Title: CDA of the FD3S rx7?
Post by: J4P RX on March 06, 2004, 11:49:11 AM
Top speed calculation :D
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