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#100121 - 20/06/2002 11:54 Re: Fan question [Re: maczrool]
genixia
Carpal Tunnel

Registered: 08/02/2002
Posts: 3411
Hmm. I make it ~60 times per minute absolute minimum, but it's going to be even more than that:

According to the FAQ, the sleds dimenions are 2"x7.2"x6.8" = ~98 cubic inches. (The dimensions are all 'max' dimensions, so the players dimension would include more errors because of the fascia being wider/taller than everything else, hence the use of the sleds dimensions.)

1 cubic foot is 1728 cubic inches. Therefore 3.5cfm is 6048 cubic inches per minute.

But, a significant percentage of the empegs volume is filled with miscellania, such as motherboard, display board, hard drives etc..If we estimated this percentage to be 40%, then that leaves approximately 60 cubic inches of air.

So we are probably looking at a figure nearer 100 times per minute.

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Mk2a 60GB Blue. Serial 030102962 sig.mp3: File Format not Valid.

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#100122 - 20/06/2002 13:05 Re: Fan question [Re: tfabris]
grgcombs
addict

Registered: 03/07/2001
Posts: 663
Loc: Dallas, TX
What about the new magnetic motorized fans with magnets running on the exterior tips of the blades ... supposedly this cuts the noise drastically down....

Greg
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#100123 - 21/06/2002 03:53 Re: Fan question [Re: tfabris]
Derek
addict

Registered: 16/08/1999
Posts: 453
Loc: NRW, Germany
Add to that the fact that, if you move it away from the holes, less air actually gets blown out of the casing. When I moved it away from the holes, I couldn't feel any air coming out of them (fan was oriented to move air up and out of the case).

Yes, well, there is a very good reason for that. If the fan casing isn't hard up against the lid then you have to seal the gap up with something don't you. Otherwise you just end up stirring up the air inside the case, especially once the gap is big enough that the resistance to flow through the gap is much lower than the resistance to flow through the holes, which is all a bit pointless really isn't it.
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(list 6284, Mk1 S/N 00299 4GB blue [sold]. Mk2 S/N 080000094 20GB blue)

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#100124 - 21/06/2002 14:01 Re: Fan question [Re: Derek]
tfabris
carpal tunnel

Registered: 20/12/1999
Posts: 31599
Loc: Seattle, WA
Well, I seem to have solved all my problems by installing the fan in the docking station instead of in the player itself. Everything runs cool as a cucumber now. I'm happy.

Thanks for all the help and suggestions.
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Tony Fabris

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#100125 - 21/06/2002 14:39 Re: Fan question [Re: tfabris]
beaker
addict

Registered: 19/08/2000
Posts: 588
Loc: England
Excellent!!!
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Marcus 32 gig MKII (various colours) & 30gig MKIIa

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#100126 - 21/06/2002 15:15 Re: Fan question [Re: tfabris]
matthew_k
pooh-bah

Registered: 12/02/2002
Posts: 2298
Loc: Berkeley, California
It actualy hit me back when you posted that you only had heating problems in your home docking station that I didn't see why it would be a problem... Has anyone with heat problems in their car tried installing a fan attached to the docking sled in a car?

Matthew

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