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XL Wingtip trimming

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Tim Juhl

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

Posted: Thu Nov 02, 2006 5:11 pm Post subject: XL Wingtip trimming

I'm installing the top skin on my right wing and looking ahead at the drawings I've come up with a couple of questions.   6-W-8 says the top wing skin should be 3658 mm long while the pre-drilled one that came from ZAC is only 3640.  In addition, when laying out the points used to establish the top cut on the wing tip 6-W-9 calls for measurements that go up to 580 mm out  from the rivet line on rib 9.  Well, the skin only measures 575 mm past the rivet line so I'm coming up short....  My plans are the most recent and the kit came in May.  Anybody else run into this and what did you do?



Tim

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CFII
Champ L16A flying
Zodiac XL - Jabiru 3300A
Almost done! It'll fly in spring!

dredmoody(at)cox.net
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Posted: Fri Nov 03, 2006 8:11 am Post subject: XL Wingtip trimming

I don't recall having that problem Tim.



Ed Moody II

Do Not Archive



---- Tim Juhl <juhl(at)avci.net> wrote: 

 	  Quote: 	
		   

 

 I'm installing the top skin on my right wing and looking ahead at the drawings I've come up with a couple of questions.   6-W-8 says the top wing skin should be 3658 mm long while the pre-drilled one that came from ZAC is only 3640.  In addition, when laying out the points used to establish the top cut on the wing tip 6-W-9 calls for measurements that go up to 580 mm out  from the rivet line on rib 9.  Well, the skin only measures 575 mm past the rivet line so I'm coming up short....  My plans are the most recent and the kit came in May.  Anybody else run into this and what did you do?

 

 Tim

 

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 Zodiac XL - Working on wings

 

 

 

 

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DaveG601XL

Joined: 27 Oct 2006
Posts: 351
Location: Cincinnati, Oh

Posted: Fri Nov 03, 2006 9:07 am Post subject: Re: XL Wingtip trimming

Tim,



I just did my first wingtip trimming and don't remember having any big problems other than my own skill level not being as good as I would have liked.  Is your skin long enough to reach the ends of the spar tip and rear channel?  If they line up there and you are only 5mm off in the middle I wouldn't see a huge problem with using your 575mm as the longest point and adjusting the other measurements slightly to keep as close to the original shape as possible.  You make the tip sheet and angles 6W9-4, -6 and -7 to match anyway.  



If your skin is shorter than the sheet metal spar tip and rear channel then you could either cut them back flush and proportion the skin measurements to match the longest point or call ZAC for a different solution.



Dave G.

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