Re: [T3] Is this a myth? Backwards side vents?

[John Jaranson <jaransonT3@comcast.net>]

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On Jan 12, 2006, at 10:12 AM, Jim Adney wrote:
> Question for John J: Is it possible that the notch profile might 
> change the
> airflow around the rear quarter panels and make louvers there 
> ineffective?

I think it could but influence it some, but not enough to be 
ineffective.  That being said the location on the rear cowl is a better 
place from an airflow standpoint.  The circulation coming off the roof 
makes that a high pressure region on the Notch.

I suspect also that VW designed the Notch first and probably built on 
what they were doing with the Beetle.  When the Square came along you 
no longer had this region for the vents and the back panel of the 
Square is a terrible place for cooling intakes due to the low pressure 
wake behind the car.  So they put them on the rear fenders.

I suspect the Fastback utilized economies of scale by using the same 
rear fender as the Square, so the cooling ended up the same.  The Notch 
style probably would have been fine for the Fastback too....but the 
rear fenders of the Square were probably better suited for the body 
lines they were looking for.  Plus the Square style cooling allowed 
more trunk space.

Later,
John Jaranson
'66 Square (Sophy)
'70 Fasty (Jane 2 - Type 3 Lead Sled wannabe)
'71 Fasty (Jane -parts car due to rust)
various parts.....don't we all.
http://mywebpages.comcast.net/jaransonT3/jaransonT3/
http://mywebpages.comcast.net/jaransonT3/2006Invasion/
http://mywebpages.comcast.net/jaransonT3/notavwclub/

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