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Mag cooling tubes

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woxofswa

Joined: 12 Aug 2008
Posts: 349
Location: AZ

Posted: Sat Dec 01, 2012 8:26 am Post subject: Mag cooling tubes

I'll be running Bendix 1200's primarily in AZ.  I'm curious about the brain trust consensus about mag cooling tubes. My spam cans never had them. 

Is the air worth taking or is the air put to better use left in the containment area?

What about the fuel pump?  

Thanks in advance.

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_________________
Myron Nelson
Mesa, AZ
Flew May 10 2014

dave.saylor.aircrafters(a
Guest

Posted: Sat Dec 01, 2012 10:28 am Post subject: Mag cooling tubes

I think it helps to cool the part of the mag closest to the breaker cam.  The little plastic follower that rides on the cam seems most sensitive to heat.  Make sure you keep the tube up close the the magneto case so the cooler air doesn't get diluted before it reaches the mag.  



I don't cool my fuel pump but I don't have to deal with the OATs that you do.

Dave Saylor

831-750-0284 CL

 



On Sat, Dec 1, 2012 at 8:26 AM, woxofswa <woxof(at)aol.com (woxof(at)aol.com)> wrote:

[quote]  --> RV10-List message posted by: "woxofswa" <woxof(at)aol.com (woxof(at)aol.com)>

 

 I'll be running Bendix 1200's primarily in AZ.  I'm curious about the brain trust consensus about mag cooling tubes. My spam cans never had them.

 Are they air worth taking or is the air put to better use left in the containment area?

 What about the fuel pump?

 Thanks in advance.

 

 --------

 Myron Nelson

 Mesa, AZ

 Emp completed, QB wings completed, legacy build fuse on gear.  Finishing kit and FWF kit in progress.

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=389673#389673

 

 

 

 

 

 

 

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 t="_blank">http://www.matronics.com/contribution

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 " target="_blank">http://www.matronics.com/Navigator?RV10-List

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carl.froehlich(at)verizon
Guest

Posted: Sat Dec 01, 2012 11:59 am Post subject: Mag cooling tubes

I'm not using cooling tubes on the mags - I will however back fit a small

tube if/when Brad at Emag ever gets the six cylinder electronic ignition

done.



On the fuel pump, no cooling tube but I had a lot of concern on the location

of the cabin heat control valves.  In the summertime all that really hot air

coming off the heat muffs is dumped right toward the fuel pump.  I put a

piece of KoolMat

http://www.aircraftspruce.com/search/search.php?s=KOOLMAT+INSULATION&x=0&y=0

between the firewall and the control valves (hole cut out where the value

penetrates the firewall0 then draped the KoolMat over the top of the valves,

tucking the end between the bottom of the valves and the nose gear mount.

This redirects the dumped hot air down and away from the engine and fuel

pump. 



Carl 



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robin(at)PaintTheWeb.com
Guest

Posted: Sat Dec 01, 2012 12:10 pm Post subject: Mag cooling tubes

Carl,

I suspect you will have built your RV-27 before the 6 cylinder P-Mag arrives.



Robin

Do Not Archive 



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Kellym

Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

Posted: Sat Dec 01, 2012 4:34 pm Post subject: Mag cooling tubes

I believe the Bendix 1200 uses a very different breaker cam follower 

arrangement than the Slicks the new engines come with.

I don't know if there is anything in the Bendix that is particularly 

heat sensitive, but my Mooney has cooling blast tubes for the stock 

Bendix mags it came with 47 yrs ago.

On 12/1/2012 11:26 AM, Dave Saylor wrote:

 	  Quote: 	
		   I think it helps to cool the part of the mag closest to the breaker 

 cam.  The little plastic follower that rides on the cam seems most 

 sensitive to heat.  Make sure you keep the tube up close the the 

 magneto case so the cooler air doesn't get diluted before it reaches 

 the mag.



 I don't cool my fuel pump but I don't have to deal with the OATs that 

 you do.



 Dave Saylor

 831-750-0284 CL

 On Sat, Dec 1, 2012 at 8:26 AM, woxofswa <woxof(at)aol.com 

 <mailto:woxof(at)aol.com>> wrote:



     

     <mailto:woxof(at)aol.com>>



     I'll be running Bendix 1200's primarily in AZ.  I'm curious about

     the brain trust consensus about mag cooling tubes. My spam cans

     never had them.

     Are they air worth taking or is the air put to better use left in

     the containment area?

     What about the fuel pump?

     Thanks in advance.



     --------

     Myron Nelson

     Mesa, AZ

     Emp completed, QB wings completed, legacy build fuse on gear.

      Finishing kit and FWF kit in progress.





     Read this topic online here:



     http://forums.matronics.com/viewtopic.php?p=389673#389673



     ===========



     target="_blank">www.aeroelectric.com

     ldersbooks.com" target="_blank">www.buildersbooks.com

     " target="_blank">www.homebuilthelp.com

     t="_blank">http://www.matronics.com/contribution

              -Matt Dralle, List Admin.

     ===========

     " target="_blank">http://www.matronics.com/Navigator?RV10-List

     ===========

     MS -

     k">http://forums.matronics.com

     ===========





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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

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