On Feb 26, 2011, at 10:24 PM, Jeffrey Engle wrote:

On Feb 26, 2011, at 9:49 PM, Jeffrey Engle wrote:

just some curiosity here ..... has anybody ever seen the cowl/ housing?

You're probably talking about the little strip of foam shown in these photos:

<http://www.ifixit.com/Guide/Repair/Installing-Power-Mac-G4-MDD-System-Fans/1623/6 >

Hey Kris, take a look at this? the 2 pictures of this show the airflow going in the opposite direction? where did this thing go?

http://www.pricedbelowmarket.com/computer-parts-hardware-fans-papst-multifan-4212/-12h-fan-218404.html

I see no indication of airflow direction? The cowl probably just makes certain air doesn't recirculate around the edges of the fan giving slightly better cooling efficiency, perhaps damping the noise a little too?

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