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Old 07-09-2018, 07:10 AM
mciaglia mciaglia is offline
Join Date: Jun 2012
Location: Houston, TX
Posts: 157
Default Wing to Fuselage wiring

As I am completing the wings and the associated wiring (heated pitot, auto-pilot, trim, ziptip lights) I have a question.

Do most people leave a long tail of wire at the wing root so it can be finished when the wings get attached?


Do people terminate them with a CPC connector or like which allows the fuselage wiring to be completed and then simply make the connection?

I know minimizing the amount of potential failure points ie. connectors is a best practice, but it seems easier to have a single connector.
Dr. Mark Ciaglia
Houston, TX
Donating Monthly since 10/17
N189PT- Christen Eagle II
N627DG (reserved)- RV10 in the making
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Old 07-09-2018, 07:34 AM
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Mel Mel is offline
Join Date: Mar 2005
Location: Dallas area
Posts: 10,308

Personally I use a terminal block inside the fuselage. This way if you need to remove the wings (rare occurrence), you can simply remove the individual wires.
Mel Asberry..DAR since last century
A&P/EAA (LifeTime) Tech Counselor/Flight Advisor/Nat'l Test Pilot School
Specializing in Amateur-Built and Light-Sport Aircraft
North Texas (8TA5)
RV-6 Flying since 1993, 172hp O-320, 3-Blade Catto (since 2003)Sold
Legend Cub purchased 12/2017
FRIEND of the RV-1
Eagle's Nest Mentor
Recipient of Wright Brothers "Master Pilot" Award
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Old 07-09-2018, 07:45 AM
rcoleman-10 rcoleman-10 is offline
Join Date: Apr 2017
Location: Bastrop, TX
Posts: 33
Default Wings to Fuselage wiring

I used a small quick disconnect cannon plug that connects from wing to Fus. Also all my egt, oil temp, cht, fuel flow and other sensor data goes into a cannon plug connect to the top center of the firewall. Greatly improves wire management. Makes for easy documentation of pin outs for the files.

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Old 07-09-2018, 08:11 AM
jibby212 jibby212 is offline
Join Date: Oct 2014
Location: Sarasota Fl
Posts: 135

I have been researching this trying to figure out what I am going to do here also. I am now leaning toward the terminal block, as I see it, it will also serve as a good way to split the wires for the left and right wing and even some wires going to the tail lighting. Still not 100% decided though.
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Old 07-09-2018, 08:13 AM
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Auburntsts Auburntsts is offline
Join Date: Jan 2005
Location: Tampa, FL
Posts: 2,671

I was going to use some type of connector but in the end opted not to. Figured if I was having to remove my wings, cutting wires would be the least of my worries. I left a long pigtail that I typically splice with D-sub sockets and pins covered with shrink tube in lieu of using a d-sub housing.
Todd “I drink and know things” Stovall
RV-10 N728TT - Flying!
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Old 07-09-2018, 08:42 AM
219PB 219PB is offline
Join Date: Aug 2014
Location: Victoria, Tx
Posts: 347

I am putting a service loop between the wing and fuselage and the wires will be crimped with water proof butt connectors. I figured that I would not be removing the wings on any frequency. Would have been best to run all of the wires direct, but I had to remove the wings due to shop constraints.

I ordered these heat shrink but connectors.
Paul Bonorden
RV-6A under construction
My Builders Website
Victoria, TX
2019 Dues Gladly Paid
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Old 07-09-2018, 08:51 AM
Mike S's Avatar
Mike S Mike S is offline
Senior Curmudgeon
Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 14,679

I mounted a D-sub 9 to the fuse for the roll servo control wiring.

Strobe wiring had Molex connectors already installed.

All other lines were done with knife splice connectors, below.

Mike Starkey
VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.

"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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Old 07-09-2018, 09:27 AM
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Carl Froehlich Carl Froehlich is offline
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 2,006

Defer wiring until final wing install (other than conduits in the wing and fusleage). No connectors or terminal blocks - just run the wires. If you ever need to take the wing off, pull them into the fusleage. For things like a D connector for something like trim or autopilot, cut it off. Just leave enough slack to put on a new connector. For wingtip antennas, disconnect and pull the coax into the fuselage.

Never a fan of terminal blocks. Too many bare connections and they tend to be clunky. If you really must do a connector have the connector on the fuselage side - easier to protect it from the elements.

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Old 07-09-2018, 10:28 AM
mciaglia mciaglia is offline
Join Date: Jun 2012
Location: Houston, TX
Posts: 157

Thanks for all suggestions. I think I will plan for a connector in the fuselage to better protect from the elements.
Dr. Mark Ciaglia
Houston, TX
Donating Monthly since 10/17
N189PT- Christen Eagle II
N627DG (reserved)- RV10 in the making
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Old 07-09-2018, 09:01 PM
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majuro15 majuro15 is offline
Join Date: Feb 2013
Location: Charlotte, NC
Posts: 558

I did a CPC for each wing. I wanted to have the wings wired and complete without putting them on to save hangar time and keep the fuse at home.
Tim Huneycutt, Capt, NCANG
RV-10 Powered on!
N1017H Reserved
EAA #: 1106970
2019 VAF Dues Paid!
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