 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
messydeer
Joined: 13 Feb 2006
Posts: 214
Location: Bellingham, WA
|
 Posted: Fri Dec 14, 2007 4:13 pm Post subject: Wing Wiring Clamps and Brackets |
 |
|
I will be routing 7-10 wires through the lightening holes of the leading edge ribs from the fuselage to the wingtip for landing (and maybe taxi) lights and nav/strobe/pos lights. Gauges vary from 10-20, average size 18. Distance between ribs is 10”. The skins will be riveted shut after wiring installation. Terminal connections are not an issue yet, since there will be no lights added until the fuselage and rest of the plane near completion. I’ll have a foot or so extra dangling out the tip end, and maybe more in the fuselage for the detaching wings of my Sonex.
The wires will stay more than 3/8” away from the edges of the lightening holes, so no grommets will be needed. Attached is a pic from Aeroelectric.com that illustrates this.
From the pitot tube inward, these brackets will also support 2 nygon tubes for the pitot tube. There will be a sag of ½” In the wires with normal hand pressure present between the rib mounted brackets. Padded Adel clamps MS-21919 will fasten the wires to the bracket, tight enough to not allow the bundle to move through the clamp when a slight axial pull is applied. Vinyl electrical tape could be used between the bundle and clamp to achieve this fit, if necessary.
Tying or lacing seems unnecessary, since the supports are less than 12 inches apart. But in another place in Chapter 11, AC43.13, it says ‘ties should be installed on service loop harnesses at 4 to 6-inch intervals.” I’m not sure what a ‘service loop harness’ is. The heading of this section looks like this: 10. SERVICE LOOP HARNESSES (Plastic Tie Strips) Do I need a tie between the clamps, or not? If ties are needed, would simply using short lengths of lacing tied in a clove hitch and square knot be okay? Or would it have to be one continual length of string?
Any suggestions appreciated!
| | - 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
| Description: |
|
Download |
| Filename: |
aeroelectric.com pic of adel clamped bundle through hole.doc |
| Filesize: |
93.5 KB |
| Downloaded: |
446 Time(s) |
_________________
Dan |
|
| Back to top |
|
 |
nuckolls.bob(at)cox.net
Guest
|
| Posted: Sat Dec 15, 2007 9:16 am Post subject: Wing Wiring Clamps and Brackets |
|
|
At 04:14 PM 12/14/2007 -0800, you wrote:
| Quote: |
I will be routing 7-10 wires through the lightening holes of the leading
edge ribs from the fuselage to the wingtip for landing (and maybe taxi)
lights and nav/strobe/pos lights. Gauges vary from 10-20, average size 18.
Distance between ribs is 10”. The skins will be riveted shut after
wiring installation. Terminal connections are not an issue yet, since
there will be no lights added until the fuselage and rest of the plane
near completion. I’ll have a foot or so extra dangling out the tip end,
and maybe more in the fuselage for the detaching wings of my Sonex.
The wires will stay more than 3/8” away from the edges of the lightening
holes, so no grommets will be needed. Attached is a pic from
Aeroelectric.com that illustrates this.
>From the pitot tube inward, these brackets will also support 2 nygon
tubes for the pitot tube. There will be a sag of ½” In the wires with
normal hand pressure present between the rib mounted brackets. Padded
Adel clamps MS-21919 will fasten the wires to the bracket, tight enough
to not allow the bundle to move through the clamp when a slight axial
pull is applied. Vinyl electrical tape could be used between the bundle
and clamp to achieve this fit, if necessary.
Tying or lacing seems unnecessary, since the supports are less than 12
inches apart. But in another place in Chapter 11, AC43.13, it says ‘ties
should be installed on service loop harnesses at 4 to 6-inch
intervals.” I’m not sure what a ‘service loop harness’ is. The
heading of this section looks like this: 10. SERVICE LOOP HARNESSES
(Plastic Tie Strips) Do I need a tie between the clamps, or not? If ties
are needed, would simply using short lengths of lacing tied in a clove
hitch and square knot be okay? Or would it have to be one continual length
of string?
Any suggestions appreciated!
|
None of the illustrations you've cited are a requirement
of any kind . . . nor are they intended to be any
sort of ordered good-better-best approach to keeping
bundles neat.
If your wires are adequately supported from coming
into contact with structure, then any form of bundling
between supports is up to you. Industry practices suggest
4-6" between ties but if you leave them off, there is
no hazard to the wires only to your aura of craftsmanship.
Chapter 11 of AC43-13 at . . .
http://www.aeroelectric.com/Reference_Docs/FAA/AC43.13-1B_Ch11_Electrical.pdf
speaks to industry standard practices.
I prefer string ties and would probably place them
at intervals not to exceed 6". Use this article
http://www.aeroelectric.com/articles/cable_lace/cable_lace.html
as a guide.
But even if you do no more than what you've described
in terms of bundle support, you're not going to find
yourself spiralling out of the sky trailing smoke
and wishing that you had put on one more string tie.
Bob . . .
| | - 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
messydeer
Joined: 13 Feb 2006
Posts: 214
Location: Bellingham, WA
|
| Posted: Sat Dec 15, 2007 2:01 pm Post subject: Re: Wing Wiring Clamps and Brackets |
|
|
Thanks, Bob 
If I get the lacing string before buttoning up the wings, I'll prolly tie the bundle in the middle of each bay. It sounds like the lacing string is easy to apply and less hazardous than plastic cable ties, so I'll break down and pay the $20 for a quarter mile of it.
Cheers,
Dan
| | - 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
nuckolls.bob(at)cox.net
Guest
|
| Posted: Sat Dec 15, 2007 5:19 pm Post subject: Wing Wiring Clamps and Brackets |
|
|
At 02:01 PM 12/15/2007 -0800, you wrote:
| Quote: |
Thanks, Bob
If I get the lacing string before buttoning up the wings, I'll prolly tie
the bundle in the middle of each bay. It sounds like the lacing string is
easy to apply and less hazardous than plastic cable ties, so I'll break
down and pay the $20 for a quarter mile of it.
|
It's nice stuff . . . and after 40 years of
herding wire, it's still my favorite "lasso".
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
| | - 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
echristley(at)nc.rr.com
Guest
|
| Posted: Sat Dec 15, 2007 7:49 pm Post subject: Wing Wiring Clamps and Brackets |
|
|
messydeer wrote:
| Quote: |
Thanks, Bob
If I get the lacing string before buttoning up the wings, I'll prolly tie the bundle in the middle of each bay. It sounds like the lacing string is easy to apply and less hazardous than plastic cable ties, so I'll break down and pay the $20 for
The hardware big-box stores carry rolls of velcro designed to hold wires
|
in bundles. The first rotation goes through a loop that locks the thing
together. Two rotations, and you can hang from it. It is as easy to
apply and as strong as zip-ties, but shouldn't erode steel tubes
(because you put the nice felt side against the tube).
| | - 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
| Back to top |
|
|
Eric M. Jones
Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts
|
| Posted: Sun Dec 16, 2007 11:53 am Post subject: Re: Wing Wiring Clamps and Brackets |
|
|
I sell the Panduit LHMS "Lightening Hole Mounting Saddles" on my website to do this wiring job. See:
http://www.periheliondesign.com/glastarparts.htm
I don't know who talked Panduit into making these-- they sell very few of these per year. Panduit usually won't touch a part if they can't sell billions.
Free sample on prospect of selling a hundred or so.
| | - 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
_________________
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net |
|
| Back to top |
|
|
messydeer
Joined: 13 Feb 2006
Posts: 214
Location: Bellingham, WA
|
| Posted: Sun Dec 16, 2007 1:15 pm Post subject: Re: Wing Wiring Clamps and Brackets |
|
|
Looks interesting, Eric.
Does it provide the required 3/8" stand-off from the edge of the metal? I have 13 ribs per wing, so for the wires I'd only need 26. Maybe more if I could adapt them to safely securing the 2 pitot tube lines. So 40 is the most I'd need and would be happy with a sample.
Cheers,
Dan
| | - 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
_________________
Dan |
|
| Back to top |
|
|
Eric M. Jones
Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts
|
| Posted: Sun Dec 16, 2007 3:27 pm Post subject: Re: Wing Wiring Clamps and Brackets |
|
|
| Quote: | Posted: Sun Dec 16, 2007 3:15 pm Post subject: Re: Wing Wiring Clamps and Brackets Looks interesting, Eric.
So 40 is the most I'd need and would be happy with a sample.
Cheers,
Dan |
Dan, send address and email me offlist at emjones(at)charter.net
| | - 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
_________________
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net |
|
| Back to top |
|
|
JohnInReno
Joined: 08 Sep 2007
Posts: 150
|
| Posted: Tue Dec 18, 2007 1:16 pm Post subject: Wing Wiring Clamps and Brackets |
|
|
Conduit and pipe hanger
I used 1/2" CPVC and pipe hangers from the usual sources.
John Morgensen
RV-9A Fuselage
messydeer wrote:
| Quote: |
Looks interesting, Eric.
Does it provide the required 3/8" stand-off from the edge of the metal? I have 13 ribs per wing, so for the wires I'd only need 26. Maybe more if I could adapt them to safely securing the 2 pitot tube lines. So 40 is the most I'd need and would be happy with a sample.
Cheers,
Dan
--------
Dan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=152556#152556
|
| | - 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:
http://www.matronics.com/Navigator?AeroElectric-List |
|
_________________
John Morgensen
RV-9A - Born on July 3, 2013
RV4 - for sale |
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
