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Albert Gardner
Joined: 10 Jan 2006
Posts: 455
Location: Yuma, AZ
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 Posted: Sun Jun 07, 2009 8:12 pm Post subject: Computer fan under glare shield |
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After the AZ sun heats up my glare shield, my Dynon EFIS sometimes indicates it’s overheated.
I bought a thin computer fan to install figuring it would be both a defrost fan as well as remove
heat from under the shield. It’s 12 V and has 3 wires attached: red, black, and yellow. Are any
of you computer knowledgeable enough to tell me which wire does what. I want to hook it up to
an on-off switch to 12 V.
Albert Gardner
N991RV
Yuma, AZ
[quote][b]
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RV-9A N872RV
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robin1(at)mrmoisture.com
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| Posted: Sun Jun 07, 2009 8:52 pm Post subject: Computer fan under glare shield |
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Albert,
As a data point I purchased an 2 ultra high velocity computer fans to act as you describes, heat removal & defrost. They had something like 3 times the airflow as normal computer fans and are a bit louder. After installing them I am surprised how much less air flow is blown through then than I expected. I can only imagine if I had used a standard fan the disappointment I would feel. I have yet to need the fans for defrost but I am glad I upgraded.
www.NewEgg.com rates them by CFM & dBA
Average Case Fan ~ 20-40 CFM $5.00
High Volume Fans ~70-90 CFM $8.00
Ultra High Volume ~100-120 CFM $10-20.00
WOW 175 CFM $35.00
Ridicules 217 CFM $42.00 (note 120 MM may be too big)
Don’t be surprised if you own 35 CFM fan.
Robin
Do Not Archive
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Albert Gardner
Sent: Sunday, June 07, 2009 9:11 PM
To: rv10-list(at)matronics.com
Subject: Computer fan under glare shield
After the AZ sun heats up my glare shield, my Dynon EFIS sometimes indicates it’s overheated.
I bought a thin computer fan to install figuring it would be both a defrost fan as well as remove
heat from under the shield. It’s 12 V and has 3 wires attached: red, black, and yellow. Are any
of you computer knowledgeable enough to tell me which wire does what. I want to hook it up to
an on-off switch to 12 V.
Albert Gardner
N991RV
Yuma, AZ
| Quote: | | http://www.matronics.com/Navigator?RV10-List |
0123456789
No virus found in this incoming message.
Checked by AVG - www.avg.com
06/07/09 17:53:00
[quote][b]
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ScooterF15
Joined: 19 Jun 2006
Posts: 136
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| Posted: Sun Jun 07, 2009 9:11 pm Post subject: Computer fan under glare shield |
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I did the same on my glareshield. I originally installed the fan as only a defrost fan, however, last weekend I had to turn it on to keep the temperature down on my EFIS units. I connected the black wire to ground and the red wire to +12V. I switched the +12V power. I snipped and shrink wrapped the yellow wire. You can experiment with a 12V battery to confirm that is the correct wiring.
-Jim
40134
On Sun, Jun 7, 2009 at 11:10 PM, Albert Gardner <ibspud(at)roadrunner.com (ibspud(at)roadrunner.com)> wrote:
[quote]
After the AZ sun heats up my glare shield, my Dynon EFIS sometimes indicates it’s overheated.
I bought a thin computer fan to install figuring it would be both a defrost fan as well as remove
heat from under the shield. It’s 12 V and has 3 wires attached: red, black, and yellow. Are any
of you computer knowledgeable enough to tell me which wire does what. I want to hook it up to
an on-off switch to 12 V.
Albert Gardner
N991RV
Yuma, AZ
| Quote: |
get="_blank">http://www.matronics.com/Navigator?RV10-List
ttp://forums.matronics.com
_blank">http://www.matronics.com/contribution
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[b]
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dave.saylor.aircrafters(a
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| Posted: Sun Jun 07, 2009 9:11 pm Post subject: Computer fan under glare shield |
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Albert,
My Dynon was doing the same thing, here in cool NorCal. Eventually it would just go black. I tried venting the top of the panel (no help), and blowing some cool air up behind the panel from the NACAs (that helped a little). Finally we put a 12V fan from McMaster (P/N 1939K39) above the Dynon, blowing down on the finned part of the case. That helped a lot. I haven't seen the problem since.
I don't use it as a defrost fan, just for cooling the Dynon. It takes cool air from one of the vent holes in the glareshield and blows it down from there.
Dave
On Sun, Jun 7, 2009 at 9:10 PM, Albert Gardner <ibspud(at)roadrunner.com (ibspud(at)roadrunner.com)> wrote:
| Quote: |
After the AZ sun heats up my glare shield, my Dynon EFIS sometimes indicates it’s overheated.
I bought a thin computer fan to install figuring it would be both a defrost fan as well as remove
heat from under the shield. It’s 12 V and has 3 wires attached: red, black, and yellow. Are any
of you computer knowledgeable enough to tell me which wire does what. I want to hook it up to
an on-off switch to 12 V.
Albert Gardner
N991RV
Yuma, AZ
| Quote: |
get="_blank">http://www.matronics.com/Navigator?RV10-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
|
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--
Dave Saylor
AirCrafters LLC
140 Aviation Way
Watsonville, CA 95076
831-722-9141 Shop
831-750-0284 Cell
[quote][b]
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jim(at)CombsFive.Com
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| Posted: Mon Jun 08, 2009 3:53 am Post subject: Computer fan under glare shield |
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The yellow wire is a speed sensor from the fan. Computer system can detect if it is turning or not. You don't need it for your application.Black - Ground, Red - +12VJim CN312F - AFS EFIS and AFS Autopilot - Sweet!Do Not Archive--------------------After the AZ sun heats up my glare shield, my Dynon EFIS sometimesindicatesit's overheated.I bought a thin computer fan to install figuring it would be both adefrostfan as well as removeheat from under the shield. It's 12 V and has 3 wires attached: red,black,and yellow. Are anyof you computer knowledgeable enough to tell me which wire does what. Iwantto hook it up toan on-off switch to 12 V.Albert GardnerN991RVYuma, AZ [quote][b]
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Tim Olson
Joined: 25 Jan 2007
Posts: 2879
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| Posted: Thu Jun 11, 2009 5:25 am Post subject: Computer fan under glare shield |
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I've got some higher speed 25CFM fans and they seem to do
a good job. I would think that they'd be a bare minimum
though. I've tried quite a bit lower volume fans and they didn't
work well. So I'd stick with something in the 25-125CFM range
if you can.
I actually have my glareshield fans blowing out anytime the
master is on, and it's helped me remember to turn the master
off a few times. It's nice because I get the plane all tucked
away in the hangar and I can hear if I left the switch on
or not. No fan noise, no dead battery.
Oh, and newegg.com rocks. I buy many thousands of bucks worth
of stuff there.
Tim Olson - RV-10 N104CD
Robin Marks wrote:
| Quote: | Albert,
As a data point I purchased an 2 ultra high velocity
computer fans to act as you describes, heat removal & defrost. They had
something like 3 times the airflow as normal computer fans and are a bit
louder. After installing them I am surprised how much less air flow is
blown through then than I expected. I can only imagine if I had used a
standard fan the disappointment I would feel. I have yet to need the
fans for defrost but I am glad I upgraded.
www.NewEgg.com <http://www.NewEgg.com> rates them by CFM & dBA
Average Case Fan ~ 20-40 CFM $5.00
High Volume Fans ~70-90 CFM $8.00
Ultra High Volume
<http://www.newegg.com/Product/Product.aspx?Item=N82E16835705057>
~100-120 CFM $10-20.00
WOW
<http://www.newegg.com/Product/Product.aspx?Item=N82E16835213008>
175 CFM $35.00
Ridicules
<http://www.newegg.com/Product/Product.aspx?Item=N82E16835706019>
217 CFM $42.00 (note 120 MM may be too big)
Don’t be surprised if you own 35 CFM fan.
Robin
Do Not Archive
*From:* owner-rv10-list-server(at)matronics.com
[mailto:owner-rv10-list-server(at)matronics.com] *On Behalf Of *Albert Gardner
*Sent:* Sunday, June 07, 2009 9:11 PM
*To:* rv10-list(at)matronics.com
*Subject:* Computer fan under glare shield
After the AZ sun heats up my glare shield, my Dynon EFIS sometimes
indicates it’s overheated.
I bought a thin computer fan to install figuring it would be both a
defrost fan as well as remove
heat from under the shield. It’s 12 V and has 3 wires attached: red,
black, and yellow. Are any
of you computer knowledgeable enough to tell me which wire does what. I
want to hook it up to
an on-off switch to 12 V.
Albert Gardner
N991RV
Yuma, AZ
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Checked by AVG - www.avg.com
06/07/09 17:53:00
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