Fans (was Re: 3B1 in the news(groups))

DoN Nichols dnichols at
Wed Jun 19 09:12:03 AEST 1991

In article <1991Jun18.032817.14348 at texrex.uucp> rmfowler at texrex.uucp (Rex Fowler) writes:

	[ ... ]

>Having two fans; one blowing in, one blowing out?  There has been discussion
>in the past about fan usage and it seemed to me that the 'FARTASS' method
>might be the best way to keep air moving through the computer.
>The only problem I see is that maybe the air blowing in exits through the 
>holes in the back(front)-plane before being sucked out by the other fan.

	All the better!  If the incoming fan is filtered, and has a bit more
airflow than the outbound fan, the extra lost through the holes will keep
the dust-bunnies out.  I haven't checked for the 3" fans, but the 5" fans
(from Rotron, at least) were available in both the 7-watt version (whisper
fan), and the 14-watt version (more noise, but more airflow).  If there is a
similar pair available, this sounds like the way to go.  With the original
7300's fans, run the inbound one on the full 12VDC, while sending reduced
power to the other.

Donald Nichols (DoN.)		| Voice (Days):	(703) 664-1585
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	--- Black Holes are where God is dividing by zero ---

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