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air plenum tube to direct air to the electronic ignition mo

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tjs22t(at)verizon.net
Guest

Posted: Mon Sep 08, 2008 6:32 pm Post subject: air plenum tube to direct air to the electronic ignition mo

I have half in round  6061-T6 to make the tubes.  How in the world do I bend the tubes as  pictured on the JabiruUSA web site?  All the tube benders I can find only  bend up to 3 eights inch tubing.

 [quote]   Jeff,

    

   Since I'm one of the owners of an    older 3300 and don't know what JAB calls for now in innovative tubing bends,    can only suggest you take your half-inch aluminum tubing to a friendly    electrical firm, (the smaller the better might work) and ask them to work some    contortions into your tubing with a conduit bender.  

    

   Might be a way...jeff    small

[b]

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jetboy

Joined: 22 Jul 2006
Posts: 233

Posted: Tue Sep 09, 2008 1:57 am Post subject: Re: air plenum tube to direct air to the electronic ignitio

You might be better to start with the softer tubing: 

3003 is available from ACS for that application.

I have formed bends by making round plywood discs as formers, a smaller diameter disc of the same thickness as the tubing, bolted between 2 larger side discs, prevents the tube collapsing when you make the bend.

Discs easily made with large holesaws.

Ralph

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_________________
Ralph - CH701 / 2200a

DaveG601XL

Joined: 27 Oct 2006
Posts: 351
Location: Cincinnati, Oh

Posted: Tue Sep 09, 2008 2:27 am Post subject: Re: air plenum tube to direct air to the electronic ignitio

Jabiru USA told me to glue in PVC water supply pipe.  It is working pretty well so far after 23 hours of flight test.



Good luck,

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_________________
David Gallagher
Cincinnati, OH area

tjs22t(at)verizon.net
Guest

Posted: Tue Sep 09, 2008 4:59 am Post subject: air plenum tube to direct air to the electronic ignition mo

An  option to tubing is 1/2" blue line cold water pipe available from the aircraft  parts department in your local Lowes, 

  

 Lots of good ideas coming at you Jeff.  If you want to get a bit  more complicated, and direct cool air on other electricals, you could do  this.  Blast tubes to both coils, both mags, and the regulator.  Fed  from NACA vent on bottom of cowl.

  

 tailwind  jeff s.

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mark(at)flylightning.net
Guest

Posted: Tue Sep 09, 2008 5:24 am Post subject: air plenum tube to direct air to the electronic ignition mo

Jeff,

  

 I've  always liked that installation!

  

 Hope  all is well with you in PA.

  

 Have a  great day!

  

 Mark

 [quote]   --

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jeffrey_davidson(at)earth
Guest

Posted: Tue Sep 09, 2008 6:52 pm Post subject: air plenum tube to direct air to the electronic ignition mo

What a great idea!  I wish I had asked for help on some of these things earlier.  I probably wasted (no: used) a lot of time trying to educate myself that I didn't have to.  I actually thought of using other materials for the tubes myself, but I thought of copper elbows.  It turns out that the1/2 inch copper elbows are a lot bigger than 1/2 inch and were too big for the 1/2 inch AL tube.  And that doesn't even consider how far apart the two metals are on the galvanic scale.  I didn't think of the plastic pipes probably because I already had some left over 6061 tubing available.  I used it elsewhere for electrical conduit.  

Jeff  

   

         

  

From: owner-jabiruengine-list-server(at)matronics.com [mailto:owner-jabiruengine-list-server(at)matronics.com] On Behalf Of THOMAS SMALL

 Sent: Tuesday, September 09, 2008 8:58 AM

 To: jabiruengine-list(at)matronics.com

 Subject: Re: JabiruEngine-List: air plenum tube to direct air to the electronic ignition modules  

  

     

An option to tubing is 1/2" blue line cold water pipe available from the aircraft parts department in your local Lowes,   

    

   

    

Lots of good ideas coming at you Jeff.  If you want to get a bit more complicated, and direct cool air on other electricals, you could do this.  Blast tubes to both coils, both mags, and the regulator.  Fed from NACA vent on bottom of cowl.  

    

   

    

tailwind  jeff s.  

  

       [quote][b]

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jeffrey_davidson(at)earth
Guest

Posted: Tue Sep 09, 2008 6:53 pm Post subject: air plenum tube to direct air to the electronic ignition mo

Thanks to all that replied.  I got several great ideas.  This should be a fun weekend finishing up a bunch of little stuff!  

Jeff  Davidson  

   

       [quote][b]

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