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Old 03-26-2018, 11:57 AM   #32 (permalink)
kach22i
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Quote:
Originally Posted by 19bonestock88 View Post
SO I got bored at work and had a few min to kill, so found some scrap coroplast and some metal strapping material and tape and made a partial Kamm for my car...
That's the perfect car to prove or disprove the principles I've discussed about a roof wing with vented and non-vented leading edge.

I say this because of the dirt roads you apparently drive on.

You most likely have a good idea how much dirt you have on your rear window normally, this can be used as a crude measurement of attached airflow, yes?

Now you have your partial Kammback or coroplast, and can observe dirt attachment.

Then you can move back or cut out an air-slot at the leading edge to see if you are getting some Venturi effect.

The dirt has a less chance of settling on surfaces with attached air-flow, yes?

I guess other methods are tufts or rolling down a hill tests, or even your gas gauge.

Tuft testing kammback spoiler and rear wheel skirts in a vw lupo 3l
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Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
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