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Wing Conduit Question - Why Not?
First time poster...
I have opened the RV-9 main rib tooling holes closest to the spar to 5/8" according to the wing wiring .pdf. After the 5/8" OD bushings are installed, I think this should accommodate the wiring needs for a day VFR RV-9. The reason for using bushings instead of conduit is I just like the look of a neatly bundled wires...even though nobody will ever see them. My question is about installing the 3/4" conduit that is also shown in the wing wiring .pdf. I really can't imagine having a need to run additional wires, but if one should ever come up, it seems like it would be a lot easier to add the conduit now instead of trying to drill additional holes in the wing ribs after the wings are closed. Are there any reasons not to install the conduit while the wings are being constructed besides a little more time and money? I have searched the forums and a lot of you have installed the conduit. But I'm also sure a lot of you haven't. Thanks, |
Welcome to VAF!!!!
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I did the bushings also. No conduit run for Aurora, as it is not part of the mission. It was a tough choice to build in lightness and not let project creep run rampant.
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conduit
I know I'm in the minority, but I didn't do conduit.
I can see the need for conduit if you are going to rivet on the wingtip. If the tip is removable it shouldn't be a big deal to run a fish down the grommets and pull a wire. A removable tip and a conduit seems like belt and suspenders to me. Like all things, to each his own. |
No conduit here. I plan on putting an expandable sleeve (chinese finger) over the wires and running thru the bushings. Plan on putting a dab of RTD on the sleeve at each bushing to keep it in place.
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I put in the conduit
It eliminates the need for bundle ties to keep the wires routed in a straight line, eliminated the need to deal with the string ties (or tie-wraps)for wire replacemenr if you need to change the wiring for any reason (original wire gauge too small), protect the wire bundle from the tools left inside when you closed up the wing. All that said I have yet to change a wire after 8 years of flying the airplane.
Bob Axsom |
Why not:
Do the following experiment:
Cut a short piece of that corrugated plastic conduit that Van's sells. Take it outside and set it down on a concrete surface well away from anything flammable. Use a match or a lighter to put a flame to the conduit material for one or two seconds until the conduit ignites. Take a few steps back so that you don't breath the smoke. Stand back and watch. No conduit for me. |
I used standard plastic electrical conduit
Didn't use Van's.
Bob Axsom |
I ran conduit...and glad I did, sure makes it easy feeding those wires down. I too used electrical conduit from the aviation conduit isle at Lowes.
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Try a different "condute"
[quote=roee;636026]Do the following experiment:
Cut a short piece of that corrugated plastic conduit that Van's sells. Take it outside and set it down on a concrete surface well away from anything flammable. Use a match or a lighter to put a flame to the conduit material for one or two seconds until the conduit ignites. Take a few steps back so that you don't breath the smoke. Stand back and watch. What Roee said is true. However if you do the same to black irrigation pipe (13mm Dripper line) It won't sustain a flame and goes out once you remove the heat source. It is also easier to get a wire down as it is smooth not corrugated. Cheers Jim |
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