Quote:
Originally Posted by drmiller100
for the sides, the real number is 22 degrees minus side winds.
I don't think 22 degree sides is realistic in the real world IMO.
The top of the car is not affected by side winds.
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If an auto maker wants to brag they'll quote the zero-degree drag coefficient.Some companies test for yaw and report a crosswind-averaged Cd.
In 1987,the Arivett Brothers designed a streamlined Top Fuel dragster which had Cd 0.20 at zero-degrees and Cd 0.18 at 12-degrees of yaw.The best funny cars of the day were measuring at around Cd 0.60.
I'll be posting some 'streamlined' cars of the past,soon I hope,and you'll see that some were designed for plan-view,with fineness ratios which would mimic a streamlined section,rather than a streamlined body of revolution.
A section of 3.92:1 has the lowest drag,so the boat tail angles are more generous.