Eric,
I just perused the site and went to the fans directory. apparently
technology is moving forward. there are a number of adaptable 12/24 volt
blowers (look like leaf blowers) that draw < 1 amp and are reasonably
priced too.
You don't get much for a dollar today, but I saw some from $5-10.
Glenn
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Eric
Schlanser
Sent: Thursday, November 05, 2009 11:41 AM
To: AeroElectric-List Digest
Subject: Avionics cooling fan revisited
In researching the Aeroelectric-list archives for cooling fans, I found
several interesting posts.
I copied and pasted the post below from 2003. When I followed Bob's
link to the fan at MPJA.com, it was no longer there. The one Bob
recommended (60 cfm and 2 amps)seems like too much when compared to
TSO'd fans like the Cyclone-21 (21 cfm and 0.19 amp) or Ameriking (26
cfm and 0.6 amp).
If Bob is reading, what would you suggest today?
Is there a specific alternative fan that would be appropriate to cool
the two radios in my OBAM plane besides the T$O's fans made for
certified planes?
Or how to house the suggested computer fans?
Have such computer fans been used successfully notwithstanding Bob's
doubts as to their suitability?
Thanks for the list,
Eric Schlanser
Match:
#83
Message:
#15485
Date: Thu, 5 Nov 2009 09:20:07 AM PST
Dec 08, 2003
From:
"Robert L. Nuckolls, III" <bob.nuckolls(at)cox.net>
Subject:
Re: cooling fans, ONE DOLLAR
<http://www.matronics.com/searching/getmsg_script.cgi?INDEX=24759583?KE
Y
S=cooling_fan?LISTNAME=AeroElectric?HITNUMBER=83?SERIAL=064059231
52?SHOW
BUTTONS=NO>
>
>There's been some talk about cooling fans, and people have
mentioned 8-12
>bucks (I think). No need to spend that much:
>
>$1 each: http://store.yahoo.com/nexfan03/evcafan80bl.html
>
>Or, for quieter, ball bearing, $4.99 each:
>http://store.yahoo.com/directron/uc001btc.html
>http://store.yahoo.com/directron/80l1a.html
Air movers for avionics need characteristics
conducive to moving air against quite a bit
of back pressure. The relatively small diameter
hoses are probably too much for a computer cooling
fan that almost never has to move air though
tiny spaces.
Most of the avionics cooling fans I've seen
used centrifugal blowers or vane axial blowers.
If I were going to hammer something together
for avionics cooling, I'd start with a product
like
http://www.mpja.com/productview.asp?product=14495+FN
This critter draws 2A and is rated at 60 cfm
(at no pressure). You could build a plenum onto
its output snoot for attaching cooling hoses.
Bob . . .
