pans
Both NASA and Renault published findings from wind tunnel research which included belly pans on Semis.They help.
Renault's V.I.R.A.G.E. attained Cd 0.29 in part,by the use of a full-length belly pan.Pretty sweet for 1987.
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Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
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