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Old 12-06-2018, 02:08 AM   #1 (permalink)
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windshield visor, but drag reduction?

I for some reason have it in my head that I want to combine a cowl visor and a sun visor to attempt an effective windshield angle reduction without the whole cut, weld, re-glue hassle of actually moving the windshield.

Maybe something like this http://www.sarona.com/media/images/4..._93_94_95_.jpg with an open top?

This would be on my w126 mercedes, not a full size van fwiw. My hood is longer which in my head would give me more room to work that angle modification.

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Old 12-06-2018, 04:23 PM   #2 (permalink)
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aerohead uses a cowl deflector. Here's an early version:

I suspect the visor is a[n air] trap. Possibly a Gurney flap at the top of the windshield would suffice.
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Old 12-06-2018, 06:21 PM   #3 (permalink)
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If you really want an outside sun visor, you could do a sun visor doubling as a big turning vane to keep the air from overshooting the windshield/roof line

Something like this, turned on its side, all along the top of the windshield, trying not to increase frontal area too much

GasDwarf's fuel consumption :
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Old 12-08-2018, 03:45 PM   #4 (permalink)
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Isn't that like the proposed spoiler for CUVs?

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