Quote:
Originally Posted by MetroMPG
According to the Mitsu report, the Airtabs are ideally sized (height wise) for the boundary layer thickness at the rear of the roof (about 30 mm). They're very close to the same height as the fin style VG's Mitsu employs.
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Form the air tab site
"Each Airtab® generates two vigorous counter-rotating vortices 4 to 5 times the height ofthe Airtab® and several feet in length before bursting
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Thats far taller than it needs to be for boundary layer tripping on a small car.
Also I found this post on autospeed from the airtabs inventor at the bottom of the page.
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A good read.
Quote:
That said, VG's are a waste of time for significant (or even detectable) fuel consumption reduction.
There's much lower fruit to be picked elsewhere.
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I agree with you here. And for the average person you are more likely to do more harm than good.