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ruebd(at)skymail.csus.edu
Guest

Posted: Wed Aug 30, 2006 7:43 am Post subject: wing spars

Gentlemen:



	If you degrade an aircraft structural member by heating it,

please be sure it never gets into the hands of someone who may want to

use it for it's original purpose.  None of us would want to ever be

'fooled' by assuming that a piece of aircraft metal is as marked if it

isn't.  

	This may seem trivial, but if you were fooled by assuming that a

piece of aircraft metal was in it's marked condition and then used it in

your baby, and then --- , well, you see what I mean.  Either cut off the

heated (altered) portion or clearly mark the piece as altered and no

longer useable for aircraft construction.  



Duane Rueb 



--

hank(at)hankseidel.com
Guest

Posted: Wed Aug 30, 2006 8:06 am Post subject: wing spars

Hi,

My wings were factory built and when I was setting up to attach them it became obvious that the front spar would have to be bent to have the attachment pin pass vertically through the center of the spar. I called the factory before continuing and was told not to bent the spar at all but to drill off center. Looks odd but that is what they told me to do. I am curious as to whether your spars have the correct separation at the inboard end. Perhaps the previous owner introduced a bend to correct the same sort of problem I had with my quick build wings.



Hank



On Aug 29, 2006, at 6:14 PM, cirrus10 wrote:

 	  Quote: 	
		  I am the second owner of a 6 in which the previous owner did very little constructionwise, and am at the point of attaching the wings.  One of wings fore spars has a bend on the vertical (perpendicular to the shear of the insert).  It is a continuous bend from end to end, and is 3/16" - 1/4" at the apex.  I carefully inspected the rivets and glue joints on that spar and see nothing unusual. 

Problem?  Do I need to replace the spar?

 

Thanks for any advice,

Ed

 	  Quote: 	
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Fox5flyer
Guest

Posted: Wed Aug 30, 2006 8:09 am Post subject: wing spars

With that tiny bid of bend, it's probably just from the way it was glued and

I doubt it would ever cause any sort of problem or even be perceptible when

covered.  As someone said, use the fabric shrinking to straighten it.

Deke



---

cirrus10(at)qwest.net
Guest

Posted: Wed Aug 30, 2006 8:57 am Post subject: wing spars

Hank,

 One of the first measurements I made were the tube  distances, and they were both the same, 27.5" c to c.

 Thanks.

  

  

 Regards,

 Ed

 [quote]   ---

cirrus10(at)qwest.net
Guest

Posted: Wed Aug 30, 2006 8:59 am Post subject: wing spars

Thanks Duane, good advice.



Regards,

Ed

---

cirrus10(at)qwest.net
Guest

Posted: Wed Aug 30, 2006 9:00 am Post subject: wing spars

John,

 No, not varnished.  I will take your advice  and reglue the stringer.

  

 Regards,

 Ed

 [quote]   ---

cirrus10(at)qwest.net
Guest

Posted: Wed Aug 30, 2006 9:01 am Post subject: wing spars

Thanks Deke.

---

cirrus10(at)qwest.net
Guest

Posted: Wed Aug 30, 2006 9:02 am Post subject: wing spars

Thanks Guy, good info.

---

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Wed Aug 30, 2006 2:35 pm Post subject: wing spars

Sorry about that Ed As I got  deeper into the thread this morning it became evident that you were trying to  soften the epoxy to remove the ribs.  I just got back to the 'puter  tonight.

  

  

 

Noel [quote]   

   --

_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

occom

Joined: 26 Aug 2006
Posts: 404

Posted: Wed Aug 30, 2006 3:19 pm Post subject: wing spars

[quote] ---

cirrus10(at)qwest.net
Guest

Posted: Wed Aug 30, 2006 3:43 pm Post subject: wing spars

Not a problem.  Just thanks to you and  everyone else who has emailed.

  

 Regards,

 Ed

 [quote]   ---

cirrus10(at)qwest.net
Guest

Posted: Wed Aug 30, 2006 3:48 pm Post subject: wing spars

Lucky for me that it's the leading edge spar.   I think I will be able to pry it as I'm using the heat.  Thanks again for  the help.

  

 Regards,

 Ed

 [quote]   ---

shilocom(at)mcmsys.com
Guest

Posted: Thu Aug 31, 2006 3:02 am Post subject: wing spars

Generally so, but not exactly.  6061-T6  actually has a slight increase in tensile properties up to 440 degrees for up to  30 min.  I looked into this when I was considering powder coating an  aluminum frame, but never did do it.  Bob U. 

 [quote]   ---

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