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Old 12-22-2015, 05:49 PM   #30 (permalink)
bluebunny
EcoModding Lurker
 
Join Date: Oct 2012
Location: chicagoland
Posts: 24

P-D_Racer - '12 VW Golf TDI
90 day: 41.91 mpg (US)
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Quote:
Originally Posted by aerohead View Post
...
...In the calm condition,if the box was at least 1.6X the box width,there'd be reattachment with zero mods,but we'd have to pay continuously for the vorticity...

...With no crosswind,a leading edge radius equal to around 4-5% of the box width would be adequate to kill the separation...

...With crosswind,it's been determined with wind tunnel testing,that a 'bulbous',or 'oval' leading surface has the lowest drag for anything below 250-mph...

...The bulbous nose is the most complicated and expensive to produce,but aerodynamically,it has no peers...
And there I have it! THANK YOU for the info, patience. Best I stuff a big ovate bulb or radii on the leading edges. Simple and robust, and then just complain about the weather.
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