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Windshield install & defrost fans

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carl.froehlich(at)verizon
Guest

Posted: Sun Apr 26, 2015 6:14 am Post subject: Windshield install & defrost fans

Attached photo is what I did.  Works well.  The hole pattern eliminated the

need for a screen.



I got a dozen or so 3", 0.12A, 12vdc brushless muffin fans from EBay for

perhaps $1 each.  You want enough fan to move air, not create a tornado.  A

single 2" fan worked well in the RV-8A.



Even with the fans off the heat from the avionics and cabin heat will come

up though the holes.  I tend to use the fans more in summer to add

additional cooling for the avionics than in the winter for defrost - but on

the few occasions I needed to defrost these were more than adequate.



Carl



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RV-10_glare_shield_fans.jpg

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rleffler

Joined: 05 Nov 2006
Posts: 680

Posted: Sun Apr 26, 2015 6:21 am Post subject: Windshield install & defrost fans

It really depends on your panel layout.    Mine are about 4" off center.    Since I have an Aerosport panel, the right one is over the comm stack.  You just need to ensure clearance and have an understanding of the likely heat sources.  



While the fans are fairly standardized, I would buy them now to ensure the proper size. 



Sent from my iPhone



 	  Quote: 	
		   On Apr 26, 2015, at 9:34 AM, rvdave <rv610dave(at)gmail.com> wrote:

 

 from ?

 

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_________________
Bob Leffler
N410BL - Phase I
http://mykitlog.com/rleffler

philperry9

Joined: 23 Nov 2011
Posts: 381

Posted: Sun Apr 26, 2015 6:35 am Post subject: Windshield install & defrost fans

What Bob said....

There really isn't a standard size, so it's best to find your fans and then drill the holes to match.   When I got my fans I bought a 3rd just to keep in a cabinet for the day when one of the two in the airplane quit working. 

I have two fans that are centered between the center rib and the side ribs.   Using the Aerosport panel, that put one over the radio stack and another behind my PFD/MFD.  

Sent from my iPhone

 	  Quote: 	
		   On Apr 26, 2015, at 9:18 AM, Bob Leffler <rv(at)thelefflers.com> wrote:

 It really depends on your panel layout.    Mine are about 4" off center.    Since I have an Aerosport panel, the right one is over the comm stack.  You just need to ensure clearance and have an understanding of the likely heat sources.  

 While the fans are fairly standardized, I would buy them now to ensure the proper size. 

 Sent from my iPhone

> On Apr 26, 2015, at 9:34 AM, rvdave <rv610dave(at)gmail.com> wrote:

> 

> from ?

> 

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rene(at)felker.com
Guest

Posted: Sun Apr 26, 2015 8:18 am Post subject: Windshield install & defrost fans

Do not archive



Be careful here, you might run into problems like the Turbo Encabulator.

You have to worry about problems with Modial Interaction.



Here is a reference:  https://www.youtube.com/watch?v=rLDgQg6bq7o



If Vans thought it was ok to have these fans, they would have put them in

the drawings and included cheap fans in the parts bag.



........



I used two 80mm fans.  Worked fine when needed for defrost, but as mentioned

by others, I use them more for airflow on hot days.



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