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Best dimensions for conduits

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gilles.thesee(at)free.fr
Guest

Posted: Sun Jan 01, 2017 10:49 am Post subject: Best dimensions for conduits

Hi all,



Best wishes for 2017.



What could be the dimensions of the conduit for the (nav/strobe lights, 

magnetometer, etc.) wires in the wing of a a composite aircraft ?

There is plenty of room in the empty leading edge, but obviously the 

passage is too large and some means of attaching the wires seems in order.

Any opinions on a practical way to use this long empty passage for wires ?

Thanks in advance for your input,

-- 

Best regards,

Gilles

http://contrails.free.fr

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kjashton(at)vnet.net
Guest

Posted: Sun Jan 01, 2017 12:15 pm Post subject: Best dimensions for conduits

Looking at your wings, I think I'd put some 1/2” to 3/4” auto wire loom protector in the wings, with zip ties so the wire does not work itself out of the split in the loom protector.  Leave a nylon string in the protector that you can later use to pull wires.  Later on, you can push a stiff wire through the loom protector and use it to pull wires.  The loom protector is lightweight but will protect them from abrasion.

-Kent

Cozy & Long-EZ builder



 	  Quote: 	
		   On Jan 1, 2017, at 1:44 PM, GTH <gilles.thesee(at)free.fr> wrote:

 

 

 

 Hi all,

 

 Best wishes for 2017.

 

 What could be the dimensions of the conduit for the (nav/strobe lights, magnetometer, etc.) wires in the wing of a a composite aircraft ?

 There is plenty of room in the empty leading edge, but obviously the passage is too large and some means of attaching the wires seems in order.

 Any opinions on a practical way to use this long empty passage for wires ?

 Thanks in advance for your input,

 -- 

 Best regards,

 Gilles

 http://contrails.free.fr

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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ceengland7(at)gmail.com
Guest

Posted: Sun Jan 01, 2017 2:05 pm Post subject: Best dimensions for conduits

Virtually everyone complains of running out of wire path volume at some 

point, so 'go big'.

For choices, the split loom stuff does work. I like this stuff:

https://www.techflex.com/prod_ccp.asp

and

https://www.techflex.com/prod_f6w.asp

Very light weight and very flexible. The unsplit stuff works like the 

old 'Chinese finger cuffs' we played with as kids; the 1" stuff will 

expand to close to 1 1/2" if you push it together (make it shorter). And 

it will shrink to about 1/2" if you stretch it. You could install the 

max size with enough length for max diameter, and when you know 

everything is in, just pull on the ends to tighten it up (if you feel 

it's needed; I don't).

Only downside to the closed stuff is that you'll need a smooth, more or 

less ball shaped end on whatever you pull through it, to avoid snagging 

on the weave.

Charlie

On 1/1/2017 2:08 PM, Kent or Jackie Ashton wrote:

 	  Quote: 	

 Looking at your wings, I think I'd put some 1/2” to 3/4” auto wire loom protector in the wings, with zip ties so the wire does not work itself out of the split in the loom protector.  Leave a nylon string in the protector that you can later use to pull wires.  Later on, you can push a stiff wire through the loom protector and use it to pull wires.  The loom protector is lightweight but will protect them from abrasion.

 -Kent

 Cozy & Long-EZ builder

> On Jan 1, 2017, at 1:44 PM, GTH <gilles.thesee(at)free.fr> wrote:

>

> 

>

> Hi all,

>

> Best wishes for 2017.

>

> What could be the dimensions of the conduit for the (nav/strobe lights, magnetometer, etc.) wires in the wing of a a composite aircraft ?

> There is plenty of room in the empty leading edge, but obviously the passage is too large and some means of attaching the wires seems in order.

> Any opinions on a practical way to use this long empty passage for wires ?

> Thanks in advance for your input,

> -- 

> Best regards,

> Gilles

> http://contrails.free.fr

>

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donvansanten(at)gmail.com
Guest

Posted: Sun Jan 01, 2017 2:23 pm Post subject: Best dimensions for conduits

Try these for pulling wire thru conduit.

http://www.techtoolsupply.com/ProductDetails.asp?ProductCode=85-901

On Sun, Jan 1, 2017 at 2:05 PM, Charlie England <ceengland7(at)gmail.com (ceengland7(at)gmail.com)> wrote:

 	  Quote: 	
		  --> AeroElectric-List message posted by: Charlie England <ceengland7(at)gmail.com (ceengland7(at)gmail.com)>

 

 Virtually everyone complains of running out of wire path volume at some point, so 'go big'.

 

 For choices, the split loom stuff does work. I like this stuff:

 https://www.techflex.com/prod_ccp.asp

 and

 https://www.techflex.com/prod_f6w.asp

 

 Very light weight and very flexible. The unsplit stuff works like the old 'Chinese finger cuffs' we played with as kids; the 1" stuff will expand to close to 1 1/2" if you push it together (make it shorter). And it will shrink to about 1/2" if you stretch it. You could install the max size with enough length for max diameter, and when you know everything is in, just pull on the ends to tighten it up (if you feel it's needed; I don't).

 

 Only downside to the closed stuff is that you'll need a smooth, more or less ball shaped end on whatever you pull through it, to avoid snagging on the weave.

 

 Charlie

 

 On 1/1/2017 2:08 PM, Kent or Jackie Ashton wrote:

  	  Quote: 	
		   --> AeroElectric-List message posted by: Kent or Jackie Ashton <kjashton(at)vnet.net (kjashton(at)vnet.net)>

 

 Looking at your wings, I think I'd put some 1/2” to 3/4” auto wire loom protector in the wings, with zip ties so the wire does not work itself out of the split in the loom protector.  Leave a nylon string in the protector that you can later use to pull wires.  Later on, you can push a stiff wire through the loom protector and use it to pull wires.  The loom protector is lightweight but will protect them from abrasion.

 -Kent

 Cozy & Long-EZ builder

 

  	  Quote: 	
		   On Jan 1, 2017, at 1:44 PM, GTH <gilles.thesee(at)free.fr (gilles.thesee(at)free.fr)> wrote:

 

 --> AeroElectric-List message posted by: GTH <gilles.thesee(at)free.fr (gilles.thesee(at)free.fr)>

 

 Hi all,

 

 Best wishes for 2017.

 

 What could be the dimensions of the conduit for the (nav/strobe lights, magnetometer, etc.) wires in the wing of a a composite aircraft ?

 There is plenty of room in the empty leading edge, but obviously the passage is too large and some means of attaching the wires seems in order.

 Any opinions on a practical way to use this long empty passage for wires ?

 Thanks in advance for your input,

 -- 

 Best regards,

 Gilles

 http://contrails.free.fr

 

 	
	
 

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user9253

Joined: 28 Mar 2008
Posts: 1920
Location: Riley TWP Michigan

Posted: Sun Jan 01, 2017 3:35 pm Post subject: Re: Best dimensions for conduits

I have not tried this but builders on another forum recommend using lawn sprinkler tubing available at home improvement stores.

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_________________
Joe Gores

rick(at)beebe.org
Guest

Posted: Mon Jan 02, 2017 9:17 am Post subject: Best dimensions for conduits

I wouldn't. I'd use smooth conduit. Either regular plastic electrical 

conduit or, as Joe suggested, something like lightweight plumbing 

tubing. I'd suggest 3/4" or 1" if it'll fit. The corrugated stuff is 

good for wrapping around wires that are already in place but I find 

trying to feed wires through it later to be a pain. The reason for the 

larger pipe is not necessarily so you can cram more wires in but because 

the extra space also makes it easier to pull or replace wires later.

--Rick

On 1/1/2017 3:08 PM, Kent or Jackie Ashton wrote:

 	  Quote: 	

 Looking at your wings, I think I'd put some 1/2” to 3/4” auto wire loom protector in the wings, with zip ties so the wire does not work itself out of the split in the loom protector.  Leave a nylon string in the protector that you can later use to pull wires.  Later on, you can push a stiff wire through the loom protector and use it to pull wires.  The loom protector is lightweight but will protect them from abrasion.

 -Kent

 Cozy & Long-EZ builder

> On Jan 1, 2017, at 1:44 PM, GTH <gilles.thesee(at)free.fr> wrote:

>

> 

>

> Hi all,

>

> Best wishes for 2017.

>

> What could be the dimensions of the conduit for the (nav/strobe lights, magnetometer, etc.) wires in the wing of a a composite aircraft ?

> There is plenty of room in the empty leading edge, but obviously the passage is too large and some means of attaching the wires seems in order.

> Any opinions on a practical way to use this long empty passage for wires ?

> Thanks in advance for your input,

> --

> Best regards,

> Gilles

> http://contrails.free.fr

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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jim(at)PoogieBearRanch.co
Guest

Posted: Mon Jan 02, 2017 10:38 am Post subject: Best dimensions for conduits

Leaving a "tied-off" line in the conduit to help pull a new wire through

is a great idea.  But remember that when you use that line to pull the

next wire through, you need to also pull through another "spare" line to

tie off, awaiting your inevitable "next" wire pull...  

Of course, I learned this the hard way...  (Long story involving a

lengthy conduit run from house to workshop, and a new welding circuit

for the shop... Sigh.)

Jim Parker

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jan_de_jong(at)casema.nl
Guest

Posted: Mon Jan 02, 2017 11:54 am Post subject: Best dimensions for conduits

I found that the black 25mm OD HDPE sprinkler system tubing by Gardena 

(2718) is very lightweight.

Fixing it inside a finished wing would be a problem. Wouldn't want it 

free to move.



Jan de Jong



On 1/2/2017 6:16 PM, Rick Beebe wrote:

 	  Quote: 	
		   



 I wouldn't. I'd use smooth conduit. Either regular plastic electrical 

 conduit or, as Joe suggested, something like lightweight plumbing 

 tubing. I'd suggest 3/4" or 1" if it'll fit. The corrugated stuff is 

 good for wrapping around wires that are already in place but I find 

 trying to feed wires through it later to be a pain. The reason for the 

 larger pipe is not necessarily so you can cram more wires in but 

 because the extra space also makes it easier to pull or replace wires 

 later.



 --Rick



 On 1/1/2017 3:08 PM, Kent or Jackie Ashton wrote:

> 

> <kjashton(at)vnet.net>

>

> Looking at your wings, I think I'd put some 1/2” to 3/4” auto wire 

> loom protector in the wings, with zip ties so the wire does not work 

> itself out of the split in the loom protector.  Leave a nylon string 

> in the protector that you can later use to pull wires.  Later on, you 

> can push a stiff wire through the loom protector and use it to pull 

> wires.  The loom protector is lightweight but will protect them from 

> abrasion.

> -Kent

> Cozy & Long-EZ builder

>

>> On Jan 1, 2017, at 1:44 PM, GTH <gilles.thesee(at)free.fr> wrote:

>>

>> 

>>

>> Hi all,

>>

>> Best wishes for 2017.

>>

>> What could be the dimensions of the conduit for the (nav/strobe 

>> lights, magnetometer, etc.) wires in the wing of a a composite 

>> aircraft ?

>> There is plenty of room in the empty leading edge, but obviously the 

>> passage is too large and some means of attaching the wires seems in 

>> order.

>> Any opinions on a practical way to use this long empty passage for 

>> wires ?

>> Thanks in advance for your input,

>> -- 

>> Best regards,

>> Gilles

>> http://contrails.free.fr

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edpav8r(at)yahoo.com
Guest

Posted: Mon Jan 02, 2017 12:16 pm Post subject: Best dimensions for conduits

If you have a solid conduit with no pull string, you can send one through by tying it around a wad of cotton balls and using either compressed air to blow it through or a shop vac to suck it through.  This works best in conduit under a couple of inches in diameter, and where the conduit isn't already stuffed full of wires.  It definitely won't work in a split loom.



Another alternative is to disconnect a wire that's already installed and use it to pull through a replacement for itself along with the new wires (and a pull string for the future).



Eric

 	  Quote: 	
		   On Jan 2, 2017, at 10:36 AM, <jim(at)poogiebearranch.com> <jim(at)poogiebearranch.com> wrote:

 Leaving a "tied-off" line in the conduit to help pull a new wire through is a great idea.  But remember that when you use that line to pull the next wire through, you need to also pull through another "spare" line to tie off, awaiting your inevitable "next" wire pull...  

 

 Of course, I learned this the hard way...  (Long story involving a lengthy conduit run from house to workshop, and a new welding circuit for the shop... Sigh.)

 

 Jim Parker

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