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  #1  
Old 11-22-2022, 03:05 PM
rjm727's Avatar
rjm727 rjm727 is offline
 
Join Date: Oct 2009
Location: Dade City, Florida
Posts: 82
Default RV14 Tailcone Wiring

Page 10-14, Step 8, has us routing wiring (WH-00057 and WH-00059) along the j channel through the F-01407 and F-01408 bulkheads. I have everything clecoed in place but I am not comfortable with routing the wires (unprotected) through the bulkheads. I am concerned about chafing as time goes by. Has anyone else changed the wiring routing? I am thinking about running some conduit through the lightening holes and running the wires through there. Any issues with this?
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Last edited by rjm727 : 11-22-2022 at 03:47 PM.
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  #2  
Old 11-22-2022, 03:31 PM
squeakersc063 squeakersc063 is offline
 
Join Date: Jul 2020
Location: Las Vegas
Posts: 21
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There isn't enough room to fit conduit in there. I wrapped mine in teflon where it goes through those channels and put conduit on it everywhere else. https://eaabuilderslog.org/showmy.ph...BD3C1D62D.jpeg
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  #3  
Old 11-22-2022, 03:38 PM
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rjm727 rjm727 is offline
 
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Location: Dade City, Florida
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Quote:
Originally Posted by squeakersc063 View Post
There isn't enough room to fit conduit in there. I wrapped mine in teflon where it goes through those channels and put conduit on it everywhere else. https://eaabuilderslog.org/showmy.ph...BD3C1D62D.jpeg
Thanks for the reply and pic. Seems there is plenty of room to run conduit through the large lightening holes?
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Happily DONATED for 2023. I meet more than one of the exemptions but feel this site is well worth the donation. Hoping other will follow suit!

Good judgment comes from experience. Unfortunately, experience usually comes from bad judgment.RV14
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  #4  
Old 11-22-2022, 05:47 PM
JET14 JET14 is offline
 
Join Date: Aug 2019
Location: Ridgeway, SC
Posts: 47
Default Tailcone wiring.

After doing the fuselage joining, I found out that on the Garmin system the power to the pitch trim which comes through the pitch servo is supposed to be shielded as is the ELT wiring and possible the taillight depending on your application. I made a decision to remove the connectors at the fuselage join and run shielded wires front to back. I feel much better about it now. The harness supplied for the roll servo is also an issue. Why put connectors 6" from the servo when the servo itself has a connector?

JET
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  #5  
Old 11-23-2022, 09:56 PM
Allan Stern Allan Stern is offline
 
Join Date: Jan 2006
Location: Cape Coral, Florida
Posts: 313
Default Wiring

Why not use some grommets?
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  #6  
Old 11-24-2022, 08:28 AM
mturnerb mturnerb is online now
 
Join Date: Apr 2015
Location: Jacksonville, FL
Posts: 1,680
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I don't think there's much risk of chafing if you secure the bundles on either side of the bulkheads as shown in plans. I found the trick to be taking care when final-installing / riveting the side skins to be sure nothing gets "pinched". Once the side skins are riveted in place, the wires won't move (therefore little risk of chafing) if secured on either side. Wrapping the bundle where it passes through bulkheads is a good idea but might make it harder to trace a problem wire later or run more wires through the channel.
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Last edited by mturnerb : 11-24-2022 at 08:32 AM.
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  #7  
Old 11-25-2022, 10:48 AM
bob865 bob865 is offline
 
Join Date: Feb 2021
Location: Greenville, SC
Posts: 56
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Properly secured wires won't chafe. I would also advise against using zip ties. In Naval aviation, Zip ties are not used expect for very specific locations because they create stress points that can cause wires to fail. Lacing (spot ties) should be used instead. Tying spot ties is an art too. A simple square not is not a properly tied spot tie. A lot of people on here refer folks to the AC 43.13 for metal repairs. I would refer you to NAVAIR 01-1A-505−1 for wire repair. Below is a link to the NAVAIR technical manual and below that is the excerpt regarding zip ties.

https://www.rbracing-rsr.com/downloa...air_manual.pdf

69. SELF-CLINCHING CABLE STRAPS (ZIP TIE).
The use of plastic cable straps is strictly prohibited in
all instances (refer to AS50881). When maintenance is
to be performed on a wire bundle secured with plastic
cable straps, only remove enough straps to affect the
appplicable repair. Upon restoration, install lacing
tape/tie string (A-A-52084, or A-A-52083) (refer to
paragraph 68). Specific installations requiring plastic
straps are to be called out in platform/aircraft-specific
manuals.
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  #8  
Old 11-27-2022, 10:45 PM
squeakersc063 squeakersc063 is offline
 
Join Date: Jul 2020
Location: Las Vegas
Posts: 21
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Quote:
Originally Posted by rjm727 View Post
Thanks for the reply and pic. Seems there is plenty of room to run conduit through the large lightening holes?
It was always my understanding that the ELT wiring should go outside the bulkhead in case a crash happens so that the line can't be severed. I dunno how to source that though, someone could have made it up.
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