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06-30-2013, 08:23 PM
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Join Date: Aug 2012
Location: Greenville, SC
Posts: 50
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Running wires in wings
Hi all,
1. If I run wires in the wings through snap bushings, i.e. without any conduit, what is a good thing to keep them from moving laterally?
2. I see people use PEX tubing for conduit. Don't know if there is some special PEX, but what I have seen at Home Depot has minimum operating temperature of 32F. Does anyone know what happens to them when temperature drops lower? Do they crack?
3. I have found clear vinyl tubing. It is much lighter than PEX, yet is much heavier than Vans' conduit. Still, does anyone have any experience with using vinyl tubes in wings?
Thanks!
__________________
Yuri
DA40
RV-10 - build in progress
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06-30-2013, 09:29 PM
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Join Date: Jul 2007
Location: Delta, CO/Atlin, BC
Posts: 2,391
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With regard to PEX, it is pretty stable well below freezing - in fact resists cracking when frozen with water inside.
To keep wires from moving, perhaps some RTV.
Greg
__________________
Greg Arehart
RV-9B (Big tires) Tipup @AJZ or CYSQ
N 7965A
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06-30-2013, 09:58 PM
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Join Date: Feb 2006
Location: San Diego, CA, U.S.A.
Posts: 770
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Quote:
Originally Posted by localizer
Hi all,
1. If I run wires in the wings through snap bushings, i.e. without any conduit, what is a good thing to keep them from moving laterally?
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Secure the wire bundle to structure using an adel clamp near the wing root. Secure it also at the outboard end near every place where a wire terminates, which also serves to strain-relief the connectors / terminals. Between these secured points, the wire bundle can then simply pass through the snap bushings.
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07-01-2013, 07:43 AM
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Join Date: Oct 2010
Location: La Feria Texas
Posts: 3,822
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I had to run pitot and AOA tubing thru a completed wing. I used some of the foam used for protecting pipes from freezing put thru some lightening holes about 1 1/2 in diameter with the tubing in the middle. Well protected and supported that way.
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07-01-2013, 08:43 AM
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Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 2,589
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Yuri---that 32* is the low working temp of the PVC with fluid and under some pressure (maybe water?) Not as use as a conduit.
Tom
__________________
Tom Swearengen, TS Flightlines LLC, AS Flightlines
Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
Ridgeland, SC
www.tsflightlines.com, www.asflightlines.com
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07-01-2013, 06:11 PM
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Join Date: Feb 2010
Location: Vancouver, BC, Canada
Posts: 860
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Running wires in wings
I used Avery 20150 nylon screw mounting base for tie-raps in each wing bay where there is an inspection panel (3 in the -9A). The wiring goes through the snap bushings in the ribs, then use a tie-rap to secure the bundle at each inspection panel. The mounting bases can be screwed into platenuts or pop riveted to the the wing spar web.
http://www.averytools.com/prodinfo.asp?number=21250
__________________
Terry Edwards
RV-9A (Fuselage)
2020/2021 VAF Contribution Sent
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07-01-2013, 09:30 PM
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Join Date: Aug 2012
Location: Greenville, SC
Posts: 50
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Thank you all for your responses!
Yuri
__________________
Yuri
DA40
RV-10 - build in progress
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