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Spar Cutout Help!

 
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slook(at)mchsi.com
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PostPosted: Sat Apr 06, 2013 4:59 pm    Post subject: Spar Cutout Help! Reply with quote

Building the 601XLB...

I have the pre-cut side skin, so the spar cutout has been made by the
factory along with most of the rivet lines, etc.

The problem is that with everything in the proper position, The spar
greatly favors the aft edge of the cutout instead of being nicely
centered. Not so much that the wing won't go in, but not an abundance
of clearance either.

At first I thought I had managed to get spar installed 10mm too far
aft, but that is not the case.

I've very carefully checked everything to plan. The skin is set so
that there is the 24mm of overlap with the tail skin, the pre-drilled
rivet lines that go up from the gear channel are in the right place,
top of the skin is even with the longeron, etc.

Those of you with the cnc'd side skins - where did your center spar
end up in relation to the opening?

Thanks,
Steve

Steve Look
Monticello, IL
www.ilrt66.com
"Dogs have owners, Cats have staff"


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Tim Juhl



Joined: 21 Mar 2006
Posts: 488
Location: "Thumb" of Michigan

PostPosted: Sun Apr 07, 2013 5:13 pm    Post subject: Re: Spar Cutout Help! Reply with quote

My skin didn't have the spar cutout although the factory marked the location to cut. The skin did have the holes drilled but in some areas they were not a great match. This was especially true on the bottom edge of the skin behind the gear channel.

I wouldn't worry too much if the cutout is off slightly. You can trim it to fit better if you like. My spar was closer to the rear predrilled rivet line so I decided to make new ones. The wing will cover the unused holes by the spar and the "T" shaped gusset that comes with the upgrade kit will cover the rest.

Good luck!
Tim


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