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05-25-2011, 10:10 PM
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Join Date: Sep 2010
Location: Houston Texas
Posts: 83
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wiring through wing question
i have started working on cleaning, flutting wing ribs. I also intend to install landing lights, strobe and nav lights. I went through FAQ that VANS published regarding wing wiring and this is what they begin with:
"There are a number installations that require routing of wires and tubes in the wing. These may include nav lights, strobe lights, landing lights, heated pitot, nav antenna, autopilot, AOA and maybe a stall warning device. Listed here, in no particular preference, are some ways to run wires and tubing through the wing ribs. "
I am confused about the autopilot part. I intend to install autopilot and now i am wondering if i have to do something now for the autopilot? also they mention that we can drill a #30 hole near the lighting hole to hold the wire conduit with a wire tie. Anyone has done this and have a picture i can take a look at i would appreciate it.
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05-25-2011, 10:22 PM
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Join Date: Nov 2010
Location: lake charles, La.
Posts: 699
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servo?
Hi Omar,
Well about the autopilot, I am not real sure but I would think some wiring for the aileron servo would have to be somewhere in there, in one of the wings. Try a search on this site and some autopilot stuff should show up. I am installing a conduit and plan on routing through lightening holes and will drill a small hole near it to use for securing it. I am also going to apply some type of anti-chaff on the edge of the lightening hole where the conduit contacts it. Either some proseal or some plastic edge material for that. Good luck on your build.
bird
__________________
Bird
rv8 entire airframe at airport now, painting done, intersection and gear upper and lower fairings done, maybe order engine around first of year or before the next rate increase.
"to fly is a privilege that I am so thankful to God for"
http://www.mykitlog.com/tcb328/
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05-26-2011, 03:03 AM
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Join Date: Jan 2005
Location: Yorkshire, England
Posts: 2,052
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I bought a cheap 3/4" step drill - got it welded to a piece of 1/4 steel rod to make a very long drill - about 3' long.
Then - choose your route down the wing, there are tooling holes in line all along the wing.
Run it through from both ends, then slide some light 3/4" OD plastic conduit down the hole.
You can thread a lot of wires down the conduit - cut holes as you pass autopilot locations etc.
Once you are comfortable it is in place - dab some silicone at each rib station and the job is done.
This came from one of the guys blogs several years ago - i am sure someone has photos of similar installations.
I am away until the weekend and will post then if necessary.
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"I add a little excitement, a little spice to your lives, and all you do is complain!" - Q
Donated in 2020
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05-26-2011, 07:19 AM
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Join Date: Jan 2009
Location: Denver, CO
Posts: 590
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I drilled aligned holes in every rib and inserted the conduit Van's sells (so does Home Depot I found out later). Works very nice, and looks good. In addition, it will make it easier if you have to add wiring after the wing is closed up. Just be careful where you locate it so it doesnt interfere with the push-pull tubes and final riveting of the last skins.
As for the AP, I added my servo motor mounting brackets (Dynon) and a wiring harness (SteinAir). It should then be easy to install the servo when I purchase it later.
__________________
Ron Duren
Mechanical Engineer
"SportAir PhD"-RV Assembly/Composites/Electrical
Denver, CO (KBJC)
RV-7 'Tip Up'
Flying!! as of 3/16/14
IO-375/ WW 200G-CS/ SkyView/ Dual P-mags
N531R "Wablosa" Wings of Red
http://www.ronsrv7project.blogspot.com
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05-26-2011, 07:57 AM
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Join Date: Mar 2005
Posts: 78
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I went the VANS route
I drilled the 3/4" hole and inserted the conduit that Vans sells for the job. The link to document I used is below. I sometimes wonder if I shouldn't have routed a second conduit for radios, lighting, antennae, etc. as I'm not sure how stuffing all the electrical into 1 conduit is going to work out (I haven't done much research on the electrical part of my plane yet).
As for the autopilot, most of your vendors sell an install kit so you can install the required brackets in your wings now, and buy the servo later when you are closer to flying. I plan on leaving the bottom outboard skin off and installing the AP later in the build.
http://www.vansaircraft.com/pdf/Wing_Wiring.pdf
John
RV-7A
Spring, TX
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05-26-2011, 10:12 PM
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Join Date: Sep 2010
Location: Houston Texas
Posts: 83
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where is the AP location
when i buy the AP install kit, does it detail where to install the brackets and servo?
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05-27-2011, 12:17 AM
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Join Date: Jan 2010
Location: Tyler, Texas
Posts: 350
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Quote:
Originally Posted by osaleh
when i buy the AP install kit, does it detail where to install the brackets and servo?
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I just Installed the Dynon Kit in the right wing and it provided very detailed instructions.
__________________
RV 7
391RK Reserved
IO360 9:5:1 AFP
Slow Build
Last 90%
Tyler, Texas
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05-27-2011, 01:00 AM
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Join Date: May 2010
Location: Los Angeles, CA
Posts: 73
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Ron, when you ran the cables or harness for the AP servo, does SteinAir add a connector at the root end of the wing, when you take the wing off in the future, whats on there. And how much was it?
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05-27-2011, 07:18 AM
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Join Date: Jan 2009
Location: Denver, CO
Posts: 590
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Quote:
Originally Posted by newimaging
Ron, when you ran the cables or harness for the AP servo, does SteinAir add a connector at the root end of the wing, when you take the wing off in the future, whats on there. And how much was it?
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I havent purchased a connector as of yet and probably wont, but I am sure Stein has something to fill your needs. The question is, and its been debated plenty on here (do a search and you'll probably find a few threads), do you want/need a connector at the wing root? When will the wings ever come off under normal circumstances? And by doing so, you're adding a possible point of failure. Because of this, I will probably not add a connector and if I ever have to remove the wings at a later time I can easily add a connector then. Thats my approach, YMMV.
__________________
Ron Duren
Mechanical Engineer
"SportAir PhD"-RV Assembly/Composites/Electrical
Denver, CO (KBJC)
RV-7 'Tip Up'
Flying!! as of 3/16/14
IO-375/ WW 200G-CS/ SkyView/ Dual P-mags
N531R "Wablosa" Wings of Red
http://www.ronsrv7project.blogspot.com
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