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Counter balance snag in the LAA drawings

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Afterfxllc(at)aol.com
Guest

Posted: Tue Feb 02, 2010 2:27 am Post subject: Counter balance snag in the LAA drawings

I have just finished installing the counter balance upgrade and the LAA  measurements will not work as printed. If you lay out the new ribs to the 327.3  the counter balance weights will not clear the lower wingtip and will hang out  of the wingtip if you install the weights on the outboard side of the square  tube.



The plans don't show this but the fix is either move the ribs 200  mm inboard or making the ribs 90 degrees of the hinge line.



for those of  you that have already rivited them as to the drawings you will have to install  all but one of your weights inboard and one of the thin weights outboard to keep  the tube from crushing.



Have Fun 

  [quote][b]

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chris Sinfield

Joined: 28 Nov 2006
Posts: 270
Location: Sydney Australia

Posted: Wed Feb 03, 2010 12:55 am Post subject: Re: Counter balance snag in the LAA drawings

I wonder why you are now seeing this when there are other planes out there with the LAA mod in place?/ out and flying? 



anyone else find this out when doing their LAA balance mod?? AMD? Zenith? LAA??



hope we can find an answer to this before I get up to it..

Chris..

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Ron Lendon

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

Posted: Thu Feb 04, 2010 10:22 am Post subject: Re: Counter balance snag in the LAA drawings

I think the confusion comes from using the Zenith supplied User Guide.  If you follow the actual LAA prints it should work out much better.



This one caught me also and I canted the ribs to gain room. I will find out tonight if that will fix the issue.

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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/

Afterfxllc(at)aol.com
Guest

Posted: Thu Feb 04, 2010 12:07 pm Post subject: Counter balance snag in the LAA drawings

No Ron if you use the LAA drawing they DON'T work. Roger didn't follow  the drawings and placed his at 90 degrees so he had much more room from the  wingtip. If you look at the photo guide you will see in his aileron the bottom  rivet line is very close to the trailing edge outboard tip. If you use the LAA  drawing measurements it is further away thus putting the tube closer to the  wing tip.

  

 Jeff

  

  In a message dated 2/4/2010 2:17:36 P.M. Eastern Standard Time,  ron.lendon(at)gmail.com writes:

  	  Quote: 	
		  -->    Zenith601-List message posted by: "Ron Lendon"    <ron.lendon(at)gmail.com>



I think the confusion comes from using the    Zenith supplied User Guide.  If you follow the actual LAA prints it    should work out much better.



This one caught me also and I canted the    ribs to gain room. I will find out tonight if that will fix the    issue.



--------

Ron Lendon, Clinton Township, MI

WW Corvair with    Roy's Garage 5th bearing

Zodiac XL, ScrapBuilder    

http://www.mykitlog.com/rlendon





Read this topic    online    here:



http://forums.matronics.com/viewtopic.php?p=284858#284858===============================================

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  [quote][b]

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Ron Lendon

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

Posted: Thu Feb 04, 2010 8:48 pm Post subject: Re: Counter balance snag in the LAA drawings

It doesn't matter who is wrong here.  The fix I am going to apply is to bend the arm about 2.5" towards the fuselage.  It was EAA chapter 13 night and some good ideas came out about how to move the bar without tearing the aileron down again.



Going to make a form to make the bend that will keep the bar boxed while forming with clamps.  Pictures and dimensions to follow.

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Afterfxllc(at)aol.com
Guest

Posted: Thu Feb 04, 2010 8:56 pm Post subject: Counter balance snag in the LAA drawings

Ron 

  

 If you do what I did and Roger suggested all you have to do is put all the  weights but 1 inboard.

 Then it fits without bending the tube.

  

 Jeff

  

  In a message dated 2/4/2010 11:50:18 P.M. Eastern Standard Time,  ron.lendon(at)gmail.com writes:

  	  Quote: 	
		  -->    Zenith601-List message posted by: "Ron Lendon"    <ron.lendon(at)gmail.com>



It doesn't matter who is wrong here.     The fix I am going to apply is to bend the arm about 2.5" towards the    fuselage.  It was EAA chapter 13 night and some good ideas came out about    how to move the bar without tearing the aileron down again.



Going to    make a form to make the bend that will keep the bar boxed while forming with    clamps.  Pictures and dimensions to follow.



--------

Ron    Lendon, Clinton Township, MI

WW Corvair with Roy's Garage 5th    bearing

Zodiac XL, ScrapBuilder    

http://www.mykitlog.com/rlendon





Read this topic    online    here:



http://forums.matronics.com/viewtopic.php?p=284928#284928===============================================

_-=    Use the  ties  Day  ================================================               - MATRONICS WEB FORUMS  ================================================             - List Contribution Web Site  sp;                             ===================================================



	


  [quote][b]

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Ron Lendon

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

Posted: Fri Feb 05, 2010 6:40 am Post subject: Re: Counter balance snag in the LAA drawings

Jeff,



The design calls for skin protection plates which I plan to use.  So the arm which is hitting the rivet line of the wingtip will be moved inboard to allow for the design factors.  



http://mykitlog.com/users/display_log.php?user=rlendon&project=780&category=0&log=98079&row=1



or



http://preview.tinyurl.com/ygzvwbs



Takes you to mykitlog which shows the proof of this idea.



This was looked at by many people from EAA Chapter 13 and this is the direction I will be proceeding.



I talked to Zenith also and made my comments to them directly.  The bottom line here is to follow the design intent and have a safe result.



Cheers,

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Ron Lendon

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

Posted: Fri Feb 05, 2010 5:46 pm Post subject: Re: Counter balance snag in the LAA drawings

Here is a link to how I bent the arms.  It came out real nice without any marks on the arms.



http://mykitlog.com/users/display_log.php?user=rlendon&project=780&category=0&log=98126&row=5



or



http://preview.tinyurl.com/yfsshrl



Cheers,

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