RE: <a4Q> The First 1000 Miles

["Duff, Ian" <iduff@charter.com>]

I've got one of those cheesy gray plexi wind deflectors in front of the
sunroof on my CQ and it makes a world of difference. No more thrumming,
no more Bozo the Clown hairdo upon arrival, an all around good thing.

Ian Duff, New Bedford, MA
1990 Coupe Quattro

>----------
>From: 	Don Hoefer[SMTP:hoefer@eng.pko.dec.com]
>Sent: 	Thursday, May 23, 1996 9:52 AM
>To: 	David Robbins
>Cc: 	Quattro List
>Subject: 	Re: <a4Q> The First 1000 Miles
>
>David Robbins asks:
>> 
>> 2.  With the sunroof open (slid back) and the windows closed, I get a
>>lot of
>> wind buffeting in the car at about 30-35 mph.  My guess is that this is a
>> basic design flaw in the way the air moves around, but wanted to see if
>> others experienced this.
>>
>
>Yes.  My Coupe does this, I know of others whose Audis do this.
>The cars are so tight that if you only have the sunroof open it
>is like blowing over the opening of a bottle.  The bottle is
>smaller so you get a higher frequency vibration.  The Audi is
>bigger so you get a low frequency vibration (about 2 -  3 Hz in
>my car) just like an organ pipe.  No design flaw, just physics.
>Open any other window a crack and it will go away.
>
>Don Hoefer
>'82 Coupe
>