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select Cd figures

To: land-speed@autox.team.net
Subject: select Cd figures
From: "gary baker" <lsr350@hotmail.com>
Date: Sun, 29 Dec 2002 10:14:23 +1100
list/ 2wheel jockeys
Here are some interesting figures for the Suzuki Hayabussa and the Kawasaki 
ZX12R
Results from Kevin Cooper principal research officer aerodynamics,National 
research council Ottawa Canada ( wind tunnel tests) rider on bike not sure?
frontal area
Hayabussa = 6.01 feet 2 (0.558m2)
ZX12R     = 6.09 feet 2 (0.566m2)
Cda
Hayabussa = 3.37 feet 2 ( 0.313m2)
ZX12R     = 3.67 feet 2 ( 0.341m2)
Cd
Hayabussa = 0.561
ZX12R     = 0.603

I am suprised at the very high Cd figures there is enormous scope for 
improvement via streamlining just goes to show that motorcycles are about as 
aerodynamic as bricks as the Hayabussa is supposedly the most aerodynamic 
production cycle to date.
hope you found these as interesting as I did
Gary


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