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XL Wing Root/Tip Shaping

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dfmoeller

Joined: 19 Jun 2006
Posts: 60
Location: Austin, TX

Posted: Tue Oct 23, 2007 4:47 am Post subject: XL Wing Root/Tip Shaping

Here's a quick question for those that have BT/DT.



Its been suggested to make a paper template of the contours of the wing skin root and end.  Easy enough to do; but do the tabular values on 6W9 represent a plan view of the 3 dimensional wing or the curve, as laid out on a flat wing skin?  If the latter, the template method is easy.  If the former, this is kind of tricky.  



How have others accomplished this task?



Thanks,



Doug

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GLJSOJ1

Joined: 18 Aug 2007
Posts: 82
Location: Chesapeake, Virginia

Posted: Tue Oct 23, 2007 7:51 am Post subject: XL Wing Root/Tip Shaping

HI DOUG

 WHEN I DID MINE I MARKED THE SKIN WITH X, Y COORDINATES AND MARKED THEM, THEN LAID A STIFF ROPE TO GET A GOOD GENTLY CURVE.    THE WING TIP IS PERFECT, THE ROOT IS IN QUESTION.  MY SUGGESTING IS TO LEAVE A LITTLE ON THE ROOT UNTIL YOU ARE READY TO SLIDE THE WINGS IN AND TRIM AS NEEDED TO GET A GOOD GAP ALL THE WAY AROUND

  

 

 	  Quote: 	
		   Subject: XL Wing Root/Tip Shaping

 From: dfmoeller(at)austin.rr.com

 Date: Tue, 23 Oct 2007 05:47:35 -0700

 To: zenith-list(at)matronics.com

 

 --> Zenith-List message posted by: "dfmoeller" <dfmoeller(at)austin.rr.com>

 

 Here's a quick question for those that have BT/DT.

 

 Its been suggested to make a paper template of the contours of the wing skin root and end. Easy enough to do; but do the tabular values on 6W9 represent a plan view of the 3 dimensional wing or the curve, as laid out on a flat wing skin? If the latter, the template method is easy. If the former, this is kind of tricky. 

 

 How have others accomplished this task?

 

 Thanks,

 

 Doug

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=141281#141281

 

 

 

 > ==

 

 

 


	


Climb to the top of the charts!  Play Star Shuffle:  the word scramble challenge with star power. Play Now!  [quote][b]

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_________________
601XL N676L FLYING PHASE I
CHESAPEAKE VA

aspen1150(at)yahoo.com
Guest

Posted: Tue Oct 23, 2007 1:02 pm Post subject: XL Wing Root/Tip Shaping

I just made a heavy paper template from the plans, it worked fine.   

  N105JT



dfmoeller <dfmoeller(at)austin.rr.com> wrote:

  [quote]--> Zenith-List message posted by: "dfmoeller" 



Here's a quick question for those that have BT/DT.



Its been suggested to make a paper template of the contours of the wing skin root and end. Easy enough to do; but do the tabular values on 6W9 represent a plan view of the 3 dimensional wing or the curve, as laid out on a flat wing skin? If the latter, the template method is easy. If the former, this is kind of tricky. 



How have others accomplished this task?



Thanks,



Doug





Read this topic online [quote][b]

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dfmoeller

Joined: 19 Jun 2006
Posts: 60
Location: Austin, TX

Posted: Tue Oct 23, 2007 3:31 pm Post subject: Re: XL Wing Root/Tip Shaping

So, from the above responses, it sounds (if I'm interpreting this correctly) that the first responder laid out his curve on the skin as installed on the wing.  The second responder laid out his curve on the flattened skin (or the same thing since the paper method duplicates the results of trimming before installing the skin).



Sounds like both produced acceptable results although I'm not clear why.  These two interpretations would not yield equivalent curves.



Maybe I should just ask Zenith what was intended.



Doug

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Jaybannist(at)cs.com
Guest

Posted: Tue Oct 23, 2007 4:21 pm Post subject: XL Wing Root/Tip Shaping

Doug,



I laid out the curve on paper. I laid the paper on the in-place skin and traced the curve.  Paper WILL bend to the bowed skin and the results are just as though the skin was flat. There is no difference here.



Jay in Dallas

"dfmoeller" <dfmoeller(at)austin.rr.com> wrote:



 	  Quote: 	
		  



So, from the above responses, it sounds (if I'm interpreting this correctly) that the first responder laid out his curve on the skin as installed on the wing.  The second responder laid out his curve on the flattened skin (or the same thing since the paper method duplicates the results of trimming before installing the skin).



Sounds like both produced acceptable results although I'm not clear why.  These two interpretations would not yield equivalent curves.



Maybe I should just ask Zenith what was intended.



Doug





Read this topic online here:



http://forums.matronics.com/viewtopic.php?p=141399#141399

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601zv(at)ritternet.com
Guest

Posted: Tue Oct 23, 2007 4:40 pm Post subject: XL Wing Root/Tip Shaping

I would bet that no one at ZAC really knows except whoever originally did 

the measurements or calculations for the dimensions on the plans, and that 

the difference is probably negligible for practical purposes. I remember 

doing mine curved in place and don't recall checking what the difference 

would be if doing it flat. In fact, without looking again at the plans, as I 

recall, the way the dimensions are given it would not make any difference if 

flat or curved.



---

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