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Old 01-16-2017, 06:53 PM   #47 (permalink)
craysus
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Join Date: Jan 2017
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Quote:
Originally Posted by freebeard View Post
I remain agnostic on VGs. The 'recieved wisdom' around these parts goes like:

Other than cleaner swing doors, how would you counter that?

If this company is facing a $100,000 order, I'd make them work for it. Ask for a heat map (good locations in red, poor locations in blue) for your specific vehicle configuration.
As I understand it, by using the VG's on the rear of a trailer you create an extended air curtain off the back of the truck...this forms a "virtual" boat tail...
Looking at some of the heat maps on youtube, you can see this results in a tear drop shape off the back of the trailer, as opposed to the huge drag inducing turbulence off the back of a standard trailer.
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