aarvig

aarvig

Well Known Member
Here's a question to ask that I didn't notice until, of course, after I drilled the holes. On the RV-9A I am drilling holes for wing wiring. I downloaded the "routing of wires in the wing" page from the construction FAQ's on Vans website. On there it says to open the forward tooling hole up to a max of 5/8 inch to take a -7 snap bushing. However, I happened upon a place in the plans that says to open that forward tooling hole up to 1/2 inch to take a -6 snap bushing. I drilled all the foward tooling holes out to 5/8 for the -7 snap bushing per the FAQ page before I noticed the plans said 1/2. Do I need to worry about rib strength integrity?
 
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I don't see why that would be a problem. If you were using the cheap plastic conduit (as I did) , your holes are bigger than 1/2" and that doesn't cause any problem.
 
I have the 3/4 inch holes for the conduit, but I am actually wondering about the forward tooling hole. Can I open that up to 5/8 per the construction FAQ's in addition to the 3/4 inch hole for the conduit? The FAQ page says I can but then the plans call out 1/2 inch for the forward tooling hole so I am wondering if I drilled a hole that is to big.:confused:
 
On one of my wings, I opened up all of the tooling holes to 13/16" for conduit. I called and then emailed Vans and this is what they told me in 2008:

Mark: we have no absolute answer, because we've never tested ribs like yours. It seems
unlikely that it will cause any problem, but we can't say for absolute sure.
Click to expand...

I'm building a 7 and not a 9 but I would imagine that you'll get a similar answer. It wasn't exactly "No problem" but I was confortable with it and I didn't replace them.

For some reason I was worried that pulling through 3/4" would be difficult in the wing-walk area. In hindsight, 13/16" is unnecessarily large; the conduit is very easy to pull through 3/4" holes.

On the other wing I put a 3/4" hole in the recommended location.
 
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