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KF 2 wing damage

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redline4100(at)att.net
Guest

Posted: Wed Nov 05, 2008 8:22 am Post subject: KF 2 wing damage

Hello,    I'm looking for help  finding the original 2.5" L.E. spar tube with extruded sheer web for my damaged  left wing. There is a dent aprx. 4" long not quite out to the strut attach  fitting. I'm curious to see if it can't be repaired. Any & all ideas will be  appreciated.   Thanks, John S.

   [quote][b]

peteohms

Joined: 31 Oct 2007
Posts: 224
Location: Leander, TX

Posted: Wed Nov 05, 2008 10:31 am Post subject: KF 2 wing damage

Have you tried Kitfox?

  

 Pete

 [quote]   ---

_________________
Pete
Leander, TX
Kitfox III, 912ul, Grove

Guy Buchanan

Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA

Posted: Wed Nov 05, 2008 12:53 pm Post subject: KF 2 wing damage

At 08:21 AM 11/5/2008, you wrote:

 	  Quote: 	
		  There is a dent aprx. 4" long not quite out to the strut attach 

fitting. I'm curious to see if it can't be repaired.


	


John,

         I'm guessing it's deep enough that you don't want to just 

live with it. If it's deep it can't be repaired, since you'll cause 

even more damage to the metal pulling it out. One thing you could do 

that would be easier than a new spar, although uglier, would be to 

glue and screw an aluminum patch over it. A lot depends on where it 

is relative to the strut bracket and ribs.

Guy Buchanan

San Diego, CA

K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.

_________________
Guy Buchanan
Deceased K-IV 1200
A glider pilot too.

redline4100(at)att.net
Guest

Posted: Wed Nov 05, 2008 1:43 pm Post subject: KF 2 wing damage

Guy, We've considered the patch idea & think that may work. Pops is an A&P & we've built a couple kitfoxs now. I would like to find some 2.5" tube for patch material & see if anyone has ribs. Again thanks for the input. John S.

--- On Wed, 11/5/08, Guy Buchanan <bnn(at)nethere.com> wrote:

  	  Quote: 	
		  From: Guy Buchanan <bnn(at)nethere.com>

Subject: Re: KF 2 wing damage

To: kitfox-list(at)matronics.com

Date: Wednesday, November 5, 2008, 3:41 PM

 	  Quote: 	
		  --> Kitfox-List message posted by: Guy Buchanan <bnn(at)nethere.com>

At 08:21 AM 11/5/2008, you wrote:

 	  Quote: 	
		  There is a dent aprx. 4" long not quite out to the strut attach 

fitting. I'm curious to see if it can't be repaired.

John,

         I'm guessing it's deep enough that you don't want to just 

live with it. If it's deep it can't be repaired, since you'll cause

even more damage to the metal pulling it out. One thing you could do 

that would be easier than a new spar, although uglier, would be to 

glue and screw an aluminum patch over it. A lot depends on where it 

is relative to the strut bracket and ribs.

Guy Buchanan

San Diego, CA

K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar. 

 [quote][b]

Float Flyr

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

Posted: Thu Nov 06, 2008 6:25 am Post subject: KF 2 wing damage

You’re doing the right thing by looking for a new spar.  Why not try John Mc Bean?  

   

Spar repairs are always suspect.  With this type of spar The only repair that I can see working is  an outside sleeve.  Trying to find the right size ID sleeve may be fun and it will add a bit of weight to your plane.  

   

Noel  

       

From: owner-kitfox-list-server(at)matronics.com [mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of redline4100(at)att.net

 Sent: Wednesday, November 05, 2008 12:51 PM

 To: Kitfox-List(at)matronics.com

 Subject: KF 2 wing damage  

  

  

     

Hello,    I'm looking for help finding the original 2.5" L.E. spar tube with extruded sheer web for my damaged left wing. There is a dent aprx. 4" long not quite out to the strut attach fitting. I'm curious to see if it can't be repaired. Any & all ideas will be appreciated.   Thanks, John S.  

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       [quote][b]

_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

redline4100(at)att.net
Guest

Posted: Fri Nov 07, 2008 8:34 am Post subject: KF 2 wing damage

Noel,    Thanks for the input. I've talked to john Mcbean. they offer a spar but doesn't have the extruded web. I've since pulled most of the dent out. We're going to put a patch front & back. Does anyone have any parts from a speed wing conversion? (ie;ribs,spar tube peice)            Thanks John S. 

--- On Thu, 11/6/08, Noel Loveys <noelloveys(at)yahoo.ca> wrote:

  	  Quote: 	
		  From: Noel Loveys <noelloveys(at)yahoo.ca>

Subject: RE: KF 2 wing damage

To: kitfox-list(at)matronics.com

Date: Thursday, November 6, 2008, 9:26 AM

You¢re doing the right thing by looking for a new spar.  Why not try John Mc Bean?

Spar repairs are always suspect.  With this type of spar The only repair that I can see working is  an outside sleeve.  Trying to find the right size ID sleeve may be fun and it will add a bit of weight to your plane.

Noel

From: owner-kitfox-list-server(at)matronics.com [mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of redline4100(at)att.net

Sent: Wednesday, November 05, 2008 12:51 PM

To: Kitfox-List(at)matronics.com

Subject: Kitfox-List: KF 2 wing damage

Hello,    I'm looking for help finding the original 2.5" L.E. spar tube with extruded sheer web for my damaged left wing. There is a dent aprx. 4" long not quite out to the strut attach fitting. I'm curious to see if it can't be repaired. Any & all ideas will be appreciated.   Thanks, John S.

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f.miles.tcp.833(at)clearw
Guest

Posted: Fri Nov 07, 2008 10:03 am Post subject: KF 2 wing damage

Joe,  

   

I understand the desire to repair your wing spar and it indeed may be possible. I do not who you may have consulted in your quest to determine if the spar is repairable but I would encourage to seek the advice of a certified airframe mechanic who has done this type of repair before and not some “shade tree mechanic”, if you get my drift. (The world is full of people with advice that don’t know what they are talking about.) It is not just matter of “patching” it but it needs to be a properly made  “stiffener” primarily on the side of the dent (possibly both inside and out) which will now always be prone to bending. An airframe mechanic with this experience will know what the rule is for his and how the stiffener needs to be designed. I am not an air frame mechanic but I do speak from experience. Good luck!  

   

Frank Miles  

K- III w/ 582  

Clarkston, Wash.  

   

         

  

From: owner-kitfox-list-server(at)matronics.com [mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of Joe Bruman

 Sent: Friday, November 07, 2008 8:34 AM

 To: kitfox-list(at)matronics.com

 Subject: RE: KF 2 wing damage  

           

Noel,    Thanks for the input. I've   talked to john Mcbean. they offer a spar but doesn't have the extruded web.   I've since pulled most of the dent out. We're going to put a patch front   & back. Does anyone have any parts from a speed wing conversion?   (ie;ribs,spar tube   peice)              Thanks John S. 

   --- On Thu, 11/6/08, Noel Loveys <noelloveys(at)yahoo.ca>   wrote:   

From: Noel Loveys   <noelloveys(at)yahoo.ca>

   Subject: RE: KF 2 wing damage

   To: kitfox-list(at)matronics.com

   Date: Thursday, November 6, 2008, 9:26 AM         

You¢re doing the   right thing by looking for a new spar.  Why not try John Mc Bean?   

   

    

   

Spar repairs are   always suspect.  With this type of spar The only repair that I can see   working is  an outside sleeve.  Trying to find the right size ID   sleeve may be fun and it will add a bit of weight to your plane.   

    

Noel   

          

From:   owner-kitfox-list-server(at)matronics.com   [mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of redline4100(at)att.net

   Sent: Wednesday, November 05,   2008 12:51 PM

   To: Kitfox-List(at)matronics.com

   Subject: KF 2 wing   damage   

   

   

       

Hello,      I'm looking for help finding the original 2.5" L.E. spar tube with   extruded sheer web for my damaged left wing. There is a dent aprx. 4"   long not quite out to the strut attach fitting. I'm curious to see if it   can't be repaired. Any & all ideas will be appreciated.     Thanks, John S.   

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occom

Joined: 26 Aug 2006
Posts: 404

Posted: Fri Nov 07, 2008 11:09 am Post subject: KF 2 wing damage

I am just finishing up after replacing both of my rear spars. One with a 

small but deep dent at jury strut attach and the other repaired by prev. 

owner with a splice for last three feet. The new spars offered by Kitfox are 

much stronger with the insert than the extruded ones ever dreamed of. Given 

the extreme ease of replacing a front spar and the expense and time to 

recover a wing. I don't think I would even consider a repair. How exactly 

would you or could you determine how much strength it has lost?



do not archive



[quote]---

Firm

Joined: 22 May 2008
Posts: 13

Posted: Fri Nov 07, 2008 1:24 pm Post subject: Re: KF 2 wing damage

I would think that repairing a spar is flirting with disaster. Not much you can do when an outboard wing folds up. Please be careful.

Howard

Jim Shumaker

Joined: 09 Jan 2006
Posts: 106

Posted: Sun Nov 09, 2008 8:07 am Post subject: KF 2 wing damage

Round tubes are not repairable.  The loads on the tubes can not be transferred evenly by any patch either internal or external.  The lack of description of the exact location and extent of damage make any speculation on its repair suspect.

  

 Because the leading edge of the wing is a structural spare, leading edge dents are structural defects and not just aerodynamic anomolies as on some aircraft.

  

 Jim Shumaker

  

 

 

 

 ---

_________________
Jim Shumaker

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