Wing Tip Installation

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Wing Tip Installation

Postby scubarider » Tue Aug 07, 2007 11:53 am

Can someone tell me the best way to mount the wing tips?  Some specifics would be nice, and pictures even better.  I have the the strobes ready to be mounted.
I have the wings almost done and would like to have everything set up before covering the wings concerning the tips.  Any advice would be much appreciated.
Thanks!
Dennis
Living life on the edge makes me dizzy.  I love Dizzy!
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Re: Wing Tip Installation

Postby Dave Krall CFII SEL SES » Tue Aug 07, 2007 2:55 pm

scubarider wrote:Can someone tell me the best way to mount the wing tips?  Some specifics would be nice, and pictures even better.  I have the the strobes ready to be mounted.
I have the wings almost done and would like to have everything set up before covering the wings concerning the tips.  Any advice would be much appreciated.
Thanks!
Dennis


I know I want these tips here to be removable, so I'm thinking stainless bolts or set screws.

It seems like a few little bolts or set screws could go through the wingtip fiberglass and directly into the forward wing spar through properly drilled and deburred holes. The aft spar would need a spacer sleeve on the top and a thinner one on the bottom between the tip and spar.

In the middle, maybe a few small U brackets that grasp through a wing rib hole and small bolts or locking pins on the outside?
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wing tip mounting

Postby Johnny C! » Tue Aug 07, 2007 8:54 pm

I was told at the factory to use my left over amounts of
epoxy to build up a healthy fillet in board of the web of
each tip rib, top & bottom. Then when you need to mount
the tips, mark off the spacings on the rib & pilot drill holes
for self tapping type screws. I thought this was the
method mentioned in builders manual, but I haven't
looked at it in a while...

My camera is at work, or I would show you my fillets...

Good Luck!

Johnny C!
There are many things that happen really fast when you are
flying an airplane. There is no sense in rushing any of the others.

I would much rather be looking down at the runway, than up at it.

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What I saw

Postby scubarider » Tue Aug 07, 2007 9:15 pm

What I saw was someone mounted the same lug anchors to the inside of the last spar.  They put them on with rivets and epoxy.  Then use  epoxy to fill in all the gaps.  Then use the machine screws to attach the tip.  I was wondering if there was a better way or alternative.
Here is the picture I got from Wahalla:
Attachments
wingtip.jpg
wingtip.jpg (116.1 KiB) Viewed 2358 times
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Postby Johnny C! » Wed Aug 08, 2007 9:34 pm

That is certainly cleaner than my epoxy fillets!

I wish I had thought of that, but since this is my
first build project, I not going to stray from the
proven methods too much on this one!

Oh well, I have both tip ribs perimeters already
full of epoxy.

Johnny C!
There are many things that happen really fast when you are
flying an airplane. There is no sense in rushing any of the others.

I would much rather be looking down at the runway, than up at it.

Duane Sorenson & Rick Norton Gone West 6/8/09. Godspeed
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Postby Dave Krall CFII SEL SES » Sat Sep 01, 2007 1:14 am

Ended up going with epoxy fillets about every 4 inches because it's fast, easy & light.
Will drill out for rivets which a mechanic has taught me are a "removable fastening device".
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