Running wing conduit

[Jetmart]

What do people do with the QB wings? I don't suppose it comes with conduit.

[N941WR]

Originally Posted by wirejock

I installed the black stuff Vans sells in the designated location before riveting bottom skins. No problem bucking rivets. Adding a dollop of proseal at each intersection was easy. Just reach in with a glob on a popsicle stick. All it does is prevent the conduit from vibrating.

I did the exact same thing. It is a challenge getting it started and it takes a good tug to get it to pull through. It also makes a horrible noise but didn't damage anything.

Here is a picture. (The pitot and AoA lines were just being test run and the service loop was later pulled out.)

(Click to enlarge)

From my website:
To make sure all wing rib conduit holes line up I made the simple template on the left. Take one rib, measure and mark the position of the conduit hole as per Van's instructions. Drill the hole with #40 (or #30) drill. (The big hole on the left was just a test hole to make sure the conduit would fit, so ignore it.) Mark the template with arrows, one pointing up, and one pointing to one corner. Hold the template in place with the marked corner touching the big lightening hole and the bottom against the bottom of the rib. Mark the hole on the template with a pen or center punch. Drill the #40 hole in the template and you are ready to start marking all of ribs.

(Click to enlarge)

[wirejock]

Originally Posted by Jetmart

What do people do with the QB wings? I don't suppose it comes with conduit.

I thought QB wings had no bottom skins. Or maybe it's just the outboard bottom skins. Anyway, just drill the hole with a long bit and start yanking. Put on some ear protection, cuz it make a horrible noise.

[N941WR]

Originally Posted by wirejock

I thought QB wings had no bottom skins. Or maybe it's just the outboard bottom skins. Anyway, just drill the hole with a long bit and start yanking. Put on some ear protection, cuz it make a horrible noise.

Exactly. I know of one guy who installed the conduit on a completed and flying -9A that he bought without removing the wings.

I believe he pulled the conduit from the wing root out to the tip, which is removable on his plane.

It was a "challenge" but he was able to do it.

[CoolDadTed]

When running conduit in the wings, some wires need to go all the way to the wingtip and others terminate earlier (a/p servo, pitot-heat, ...). Do you run a single conduit and cut exit holes midway, or do you run different conduits for the different distances?

Thanks,
-Ted

[RV6_flyer]

Originally Posted by CoolDadTed

When running conduit in the wings, some wires need to go all the way to the wingtip and others terminate earlier (a/p servo, pitot-heat, ...). Do you run a single conduit and cut exit holes midway, or do you run different conduits for the different distances?

Thanks,
-Ted

I cut an exit hole in mine. I used the recommended material that Van's Aircraft calls out in the location that they recommend.

[N941WR]

Originally Posted by wirejock

Yes. Just keep pulling. It will go.

Ditto for me and it sounds horrible when you pull it. Not only that, but you really have to tank on it but it will pull through without damaging any thing.

One suggestion, after you pull it through and before you run any wires, cut openings in it by where your roll servo and pitot heat wires will have to come out.

[wirejock]

Originally Posted by CoolDadTed

When running conduit in the wings, some wires need to go all the way to the wingtip and others terminate earlier (a/p servo, pitot-heat, ...). Do you run a single conduit and cut exit holes midway, or do you run different conduits for the different distances?

Thanks,
-Ted

Use a pencil type soldering iron to drill a hole in the conduit.

[Reflex]

Van's Tech wasn't excited about me drilling another hole in my ribs. They didn't say I couldn't, just didn't like the idea. So, I used SpringFast flexible grommets and Van's conduit. I contacted SpringFast and they stated that I could use as little as 1/3 diameter of a circle and the grommet wouldn't move. I used about 1/2 diameter (look hard on second rib) on the internal ribs and a full grommet on each end rib. Clears bellcrank, servo, pushrods, etc. with ease. Conduit is yet to be trimmed.

[RV10Man]

I ran separate conduits for my a/p servo and lights. I wanted to make sure I had separation for possible strobe interference.