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  #1  
Old 09-11-2017, 10:10 AM
RicoB RicoB is online now
 
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Default Avionics Cooling fan

What have you guys done about that? I am at that point so trying to get ideas. I love to use the cyclone 21-3 but the price is pretty steep for a fan!
Got ideas and pics to share?
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  #2  
Old 09-11-2017, 10:20 AM
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Raymo Raymo is offline
 
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I have a few cooling fans out of old HP servers that work great. They run on 12 volts, are light and inexpensive. Mine comes on with the nav lights.

I have several extras if you'll donate $5 to VAF and pay shipping (USPS small box or padded envelope).

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  #3  
Old 09-11-2017, 10:20 AM
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Auburntsts Auburntsts is offline
 
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I didn't install one. My GTN 650 has a built-in fan, but I don't think that in most instances an external fan is required for today's avionics. However, I have nothing factual to back that assertion up.
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  #4  
Old 09-11-2017, 10:48 AM
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rleffler rleffler is offline
 
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My Garmin transponder was the other thing in my panel that needed a dedicated fan port. I added two standard computer fans on the glareshield. They solve two issues. The first is to remove hot air trapped behind the panel. The second is function a defroster when the temps start to drop.
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  #5  
Old 09-11-2017, 02:07 PM
SteinAir SteinAir is offline
 
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Many of the modern avionics and EFISes have their own cooling fans in or on them, and in addition to that perhaps the most important thing is to have some sort of vent holes in the glareshield (or even a couple muffin fans). That should allow that dead space between the main panel and sub panel to be ventilated and kept at a good temperature, so everything should be good (as Bob noted, those glareshield fans also work as defrosters too).

Just my 2 cents as usual!

Cheers,
Stein
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  #6  
Old 09-11-2017, 11:53 PM
RicoB RicoB is online now
 
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I guess I forgot to mention that mine is a tip up canopy so fan placement on the glare shield is not quite the same!!
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  #7  
Old 09-12-2017, 02:17 AM
Wingnut Wingnut is offline
 
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Default I believe it

was Bruce Swayze that did an excellent job of describing how to mount fans in his tip up glare shield. Check his build log website for details. 09-30-15 entry.
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Last edited by Wingnut : 09-12-2017 at 02:20 AM. Reason: Added date of entry.
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  #8  
Old 09-12-2017, 05:53 AM
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Auburntsts Auburntsts is offline
 
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Quote:
Originally Posted by SteinAir View Post
Many of the modern avionics and EFISes have their own cooling fans in or on them, and in addition to that perhaps the most important thing is to have some sort of vent holes in the glareshield (or even a couple muffin fans). That should allow that dead space between the main panel and sub panel to be ventilated and kept at a good temperature, so everything should be good (as Bob noted, those glareshield fans also work as defrosters too).

Just my 2 cents as usual!

Cheers,
Stein
I should have stated that I also have 2 glaresheld vents too.
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  #9  
Old 09-12-2017, 08:38 AM
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flion flion is offline
 
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When Stein speaks avionics, we should all listen.

My -6A has a fan but no venting in the glare shield and pooled heat can get to around 150 degrees on a hot day. The -10 will have vents and has two fans to service the ports on the G900X components and the LSE ignition boxes. Those fans are mounted on the sub-panel between the G900X racks and are updraft to draw from cooler air below the panel and any air not forced into the cooling hoses will be sent up toward the glare shield vents. Don't count on your avionics having fans and, even if they do, you still want to be sure air moves from under your panel so you're not 'cooling' your avionics with hot air.

And, while the -6A panel is out this winter getting updated, I will rectify the dead air situation behind the panel.
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  #10  
Old 09-12-2017, 01:33 PM
lr172 lr172 is offline
 
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Quote:
Originally Posted by SteinAir View Post
Many of the modern avionics and EFISes have their own cooling fans in or on them, and in addition to that perhaps the most important thing is to have some sort of vent holes in the glareshield (or even a couple muffin fans). That should allow that dead space between the main panel and sub panel to be ventilated and kept at a good temperature, so everything should be good (as Bob noted, those glareshield fans also work as defrosters too).

Just my 2 cents as usual!

Cheers,
Stein
This is what I did. The 6A glareshield isn't' big enough to put a fan in it, so I used two 80mm computer fans in the area behind the panel. One sits near the bottom of the panel, pushing air up and the other sits in the foreward bulkhead in the cutout for the avionics, behind the panel, pushing air into the foreward area. I figured this would keep the air behind the panel from getting stale and hot.

Larry
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