On Feb 26, 2011, at 8:42 PM, Kris Tilford wrote:
> 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?
The direction the fan is in the bracket says to me the airflow is going the
wrong way? that's assuming that the "bracket" is installed in a similar fashion
as the stock fan in my MDD....
Something else... what do you suppose this guy is talking about?
Apple's Solution--Does It Work?
After releasing the MDD's successor, the quieter G4 FW800, Apple made a
retrofit noise kit available to MDD owners. It comprises a new Papst fan
("Multifan 4212H", 12 V, 5.3 W), a new power supply, and a good set of
instructions. The power supply looks the same, but presumably has new fans. It
has been derated to 360 W, down from the original 400 W. I should point out
that this mod kit does NOT include a fan cowl such as is used on the FW 800
machines. This means the coupling of the fan to the heat sink is still not very
efficient.
the phrase "I should point out that this mod kit does NOT include a fan cowl
such as is used on the FW 800 machines" has got me wondering what this guy is
talking about? got any ideas?
Jeffrey Engle
Kamiah, Idaho 83536
macgu...@gmail.com
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