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Wing Spar mysteries or how to make a left a right

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Ron Lendon

Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI

Posted: Tue Oct 17, 2006 2:03 pm Post subject: Wing Spar mysteries or how to make a left a right

Scratch builders,



While taking all the care I could muster, I have scratch built my outer wing spars.  During the process I noticed my template, the left wing spar web, would need to be bent away from the line on the part.  I left it flat and the flanged hole un-cut till I had the spar caps and angles all drilled and ready for rivets.  Well wouldn’t you know it I bent that flange and the flanged hole the wrong way.



My first thought was to just leave it and continue on, but I couldn’t stop thinking about it so. . . I discovered why you want to keep that drill press square when making these parts.  I was able to move the spar caps and the spar cap doublers to the other side of the web and take the spar cap angles from the other spar assembly and save the integrity of the CH design with a few fatter rivets.  Everything will come out to spec just not perfect, Is anything we make perfect?



Now I hope I bend the other side the right way.  I think I will be most careful and compare it many times before bending.

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_________________
Ron Lendon
WW Corvair with Roy's Garage 5th bearing
CH 601 XLB
N601LT - Flying
http://www.mykitlog.com/rlendon
Corvair Engine Prints:
https://sites.google.com/site/corvairenginedata/

cj.tremblay(at)videotron.
Guest

Posted: Tue Oct 17, 2006 3:25 pm Post subject: Wing Spar mysteries or how to make a left a right

I Ron,



I just finish to fabric my own extended wing spars and I/O web spars for my CH640. Your wings are similar to mine (I think so) except mine are wider and longer.  I don’t understand your problem. Photo will add more explanation. The pieces that I made are bend (except Inboard Spar - not have to be) and the flange holes are done. 



I can send photo if required, my web site is not up to date on spars progress.



Christian Tremblay

www.zodiac640.com

-----Message d'origine-----

De : owner-zenith-list-server(at)matronics.com [mailto:owner-zenith-list-server(at)matronics.com] De la part de Ron Lendon

Envoyé : Tuesday, October 17, 2006 6:03 PM

À : zenith-list(at)matronics.com

Objet : Wing Spar mysteries or how to make a left a right






Scratch builders,



While taking all the care I could muster, I have scratch built my outer wing spars.  During the process I noticed my template, the left wing spar web, would need to be bent away from the line on the part.  I left it flat and the flanged hole un-cut till I had the spar caps and angles all drilled and ready for rivets.  Well wouldnâ€™t you know it I bent that flange and the flanged hole the wrong way.



My first thought was to just leave it and continue on, but I couldnâ€™t stop thinking about it so. . . I discovered why you want to keep that drill press square when making these parts.  I was able to move the spar caps and the spar cap doublers to the other side of the web and take the spar cap angles from the other spar assembly and save the integrity of the CH design with a few fatter rivets.  Everything will come out to spec just not perfect, Is anything we make perfect?



Now I hope I bend the other side the right way.  I think I will be most careful and compare it many times before bending.



--------

Ron Lendon, Clinton Township, MI

Corvair Zodiac XL, ScrapBuilder 





Read this topic online here:



http://forums.matronics.com/viewtopic.php?p=68593#68593

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Ron Lendon

Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI

Posted: Tue Oct 17, 2006 6:11 pm Post subject: Re: Wing Spar mysteries or how to make a left a right

For clairifcation:  see the flanged hole and the flange at the end of the web?  Yesterday they were pointing up in the same direction as the spar cap angles.

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TxDave

Joined: 22 Jul 2006
Posts: 168
Location: Temple, TX

Posted: Tue Oct 17, 2006 10:14 pm Post subject: Re: Wing Spar mysteries or how to make a left a right

Way to go Ron. You do such high quality work. Your precise approach paid off in saving you from the task of making another spar web.



The fact that a builder of your stature can make a mistake lets me feel a little less angst over blunders I have made along the way.



Thanks,

Dave Clay

601XL Scratch Builder

Temple, TX

www.daves601xl.com

do not archive

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