07-25-2006, 05:25 PM
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#9
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Registered Member
Join Date: Dec 2005
Posts: 4,223
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More info I've found about VG's...
zpiloto: yours are/were not on backwards, at least according to the old web site of Gary Wheeler, an Indy car designer/aerodynamicist who originally popularized VG's for use on regular cars (if I'm not mistaken). His were oriented the same way as your photos show.
zugyNA: what's that flat black thing on the top of the rear window downstream of your VG's? It's not a spoiler is it? (Would kind of negate the VG's.)
3rd party tests: I still haven't found anything good that supports using these at the trailing edge of a vehicle (vs. the roof)... but I did hear back from the airtabs company with a report of a study done in the UK using them ahead of the tractor/trailer gap, and it appears legit.
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ZugyNA 
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