Drilled conduit hole on wrong side of rib

jerryb · Post by **jerryb** » Mon Jul 07, 2008 1:37 pm

I started to drill the holes for the conduit before I realized it I drilled .75" holes into 2 ribs on the wrong side of the rib.

They are in the top of the rib instead of the bottom as shown in the recommended location drawing. I have drilled all the other ribs correctly except these 2 ribs have an extra hole. They are the 2nd and 4th in board ribs in the wing walk area. I guess my question is deburr, prime and keep building or do I order 2 new ribs?????

Jerry
Working on the wings
RV 7

Post by **Spike** » Mon Jul 07, 2008 1:44 pm

Keep on trucking....

cjensen · Post by **cjensen** » Mon Jul 07, 2008 2:18 pm

Don't even give it another thought Jerry. I drilled ALL the ribs on the top for the conduit...it can be dealt with easily enough.

jerryb · Post by **jerryb** » Mon Jul 07, 2008 6:42 pm

Thanks, I just needed some reassurance to keep going.

Jerry

jerryb · Post by **jerryb** » Mon Jul 07, 2008 10:51 pm

Stupid question, What size should the hole for the conduit be?

3/4" seems awfully small. The conduit is very tight in 3/4" hole.

cjensen · Post by **cjensen** » Mon Jul 07, 2008 11:21 pm

I used 3/4", and it is a bit tight. Are you using the corrugated stuff or smooth? I used smooth, but wish I would've used the corrugated tube...

cnpeters · Post by **cnpeters** » Mon Jul 07, 2008 11:21 pm

jerryb wrote:Stupid question, What size should the hole for the conduit be? 3/4" seems awfully small. The conduit is very tight in 3/4" hole.

If you are talking about Van's corrugated conduit, 3/4" is the proper hole. To pull the conduit through, stretch it as you pull through the hole, and give it a little side to side wiggle, too. It will make a lot of racket. Don't leave much stretch when done - just enough to keep the conduit from sagging. Some people will proseal the first and last holes to ensure the conduit doesn't slip, but I left a little overhand on the ends and felt it was overkill to break out the 'tar'.

Lorin Dueck · Post by **Lorin Dueck** » Tue Jul 08, 2008 2:38 pm

I did the same thing as Carl - using Van's corrogated conduit in 3/4" hole.
Pull.. stretch... wiggle up & down. Ignore the noise. After you get the hang of it - you can pull 1-2" though at a time.
Recommend you do the inboard ribs first since it's a little tight.
Don't squeeze the tubing too hard - it crushes easily (don't ask how I know).
I built both my wings at the same time - and pulled the conduit in 2 separate nights (all the stretching and relaxing of the conduit can be tough on the fingers - it pinches....).

Lorin D
SB 9A / O-320 / Tip Up
Fuse ordered

N194LD Reserved

Post by **bullojm1** » Tue Jul 08, 2008 3:21 pm

I used a 3/4" hole too and it was a little on the tight side, however once the corrugated tubing is in the hole, it is loose, so you don't want to go any bigger than 3/4". I didn't find it a big deal at all to pull, maybe an hour between the two wings.

One thing you will want to do is put some tank sealant or RTV between the tubing and the rib so the rib doesn't work itself into the tubing. I used ProSeal and it worked out great.