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XL Landing gear nuts Torque

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chris Sinfield

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

Posted: Sun Dec 02, 2007 4:02 am Post subject: XL Landing gear nuts Torque

Hi all

Today we stood it on the gear, what a sight. Now for the life of me I cant find the torque required on the nut before I drill it and split pin. Those of you how are already there where did you find it ? Is it just the normal torque for that size nut from the figures on the new CS page 35?? 



Chris.

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bryanmmartin

Joined: 10 Jan 2006
Posts: 1018

Posted: Sun Dec 02, 2007 5:30 am Post subject: XL Landing gear nuts Torque

If you torque it to the standard value for that nut, you will bend the aluminum extrusion holding the gear spring in place. The gear spring has to pivot some at that point as you load and unload the mains. I just tightened the nuts until the rubber strips were compressed a bit and the extrusion wasn't distorted. It's kind of like the engine mount bolts with the rubber cones, they need to be snug but not over tightened.



On Dec 2, 2007, at 7:02 AM, chris Sinfield wrote:

 	  Quote: 	
		  --> Zenith-List message posted by: "chris Sinfield" <chris_sinfield(at)yahoo.com.au (chris_sinfield(at)yahoo.com.au)>

Hi all

Today we stood it on the gear, what a sight. Now for the life of me I cant find the torque required on the nut before I drill it and split pin. Those of you how are already there where did you find it ? Is it just the normal torque for that size nut from the figures on the new CS page 35?? 

Chris.

	






 -- 

Bryan Martin

N61BM, CH 601 XL, 

RAM Subaru, Stratus redrive.

 



 [quote][b]

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Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive.

Afterfxllc(at)aol.com
Guest

Posted: Sun Dec 02, 2007 9:41 am Post subject: XL Landing gear nuts Torque

I don't think that is correct... you don't want any flexing at the angle. I  torque mine to the proper torque specs for the nut and it did bend the angle  slightly. I would call Zenith on this one. If you look at the photos theirs is  bent also.

  

 Jeff

  

  In a message dated 12/2/2007 8:32:29 A.M. Eastern Standard Time,  bryanmmartin(at)comcast.net writes:

  	  Quote: 	
		  If you    torque it to the standard value for that nut, you will bend the aluminum    extrusion holding the gear spring in place. The gear spring has to pivot some    at that point as you load and unload the mains. I just tightened the nuts    until the rubber strips were compressed a bit and the extrusion wasn't    distorted. It's kind of like the engine mount bolts with the rubber cones,    they need to be snug but not over tightened.    

   

      On Dec 2, 2007, at 7:02 AM, chris Sinfield wrote:

    	  Quote: 	
		       --> Zenith-List message posted by: "chris      Sinfield" <chris_sinfield(at)yahoo.com.au (chris_sinfield(at)yahoo.com.au)>

     



     Hi all

     Today we stood it on the gear, what a sight. Now      for the life of me I cant find the torque required on the nut before I drill      it and split pin. Those of you how are already there where did you find it ?      Is it just the normal torque for that size nut from the figures on the new      CS page 35?? 

     



     Chris.

     



	






      -- 

   Bryan Martin

   N61BM, CH 601 XL, 

   RAM Subaru, Stratus redrive.

 	  Quote: 	
		  



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.matronics.com/">http://forums.matronics.com



	
	




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  [quote][b]

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Tim Juhl

Joined: 21 Mar 2006
Posts: 488
Location: "Thumb" of Michigan

Posted: Sun Dec 02, 2007 12:15 pm Post subject: Re: XL Landing gear nuts Torque

This is one of those questions that we'd all like to see answered.  Please contact Zenith and report back what you find out.



Tim

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bryanmmartin

Joined: 10 Jan 2006
Posts: 1018

Posted: Sun Dec 02, 2007 12:17 pm Post subject: XL Landing gear nuts Torque

It will flex at the angle. When you put a load on the mains, the gear legs bend upward and the middle section of the gear spring bows downward. This is noticeable even when the plane is empty and parked. There's no way to get the nuts tight enough to prevent this. Most of the bending occurs in the gear legs of course. If this was meant to be a rigid attachment, you wouldn't bother with the rubber spacers.

I tightened my nuts until they started to distort the extruded angles. I didn't manage to get the torque to the standard value. It does have to be tight enough to prevent any vertical play at the attachment point. The notches in the gear spring and the close fit of the bolts to the spring prevent any sideways or fore-aft movement.

On Dec 2, 2007, at 12:40 PM, Afterfxllc(at)aol.com (Afterfxllc(at)aol.com) wrote:

 	  Quote: 	
		    I don't think that is correct... you don't want any flexing at the angle. I torque mine to the proper torque specs for the nut and it did bend the angle slightly. I would call Zenith on this one. If you look at the photos theirs is bent also.

  

 Jeff

  

  In a message dated 12/2/2007 8:32:29 A.M. Eastern Standard Time, bryanmmartin(at)comcast.net (bryanmmartin(at)comcast.net) writes:

  	  Quote: 	
		  If you   torque it to the standard value for that nut, you will bend the aluminum   extrusion holding the gear spring in place. The gear spring has to pivot some   at that point as you load and unload the mains. I just tightened the nuts   until the rubber strips were compressed a bit and the extrusion wasn't   distorted. It's kind of like the engine mount bolts with the rubber cones,   they need to be snug but not over tightened.   

  

    On Dec 2, 2007, at 7:02 AM, chris Sinfield wrote:

   	  Quote: 	
		      --> Zenith-List message posted by: "chris     Sinfield" <chris_sinfield(at)yahoo.com.au (chris_sinfield(at)yahoo.com.au)>

    



    Hi all

    Today we stood it on the gear, what a sight. Now     for the life of me I cant find the torque required on the nut before I drill     it and split pin. Those of you how are already there where did you find it ?     Is it just the normal torque for that size nut from the figures on the new     CS page 35?? 

    



    Chris.

    



	




	




	






 -- 

Bryan Martin

N61BM, CH 601 XL,

RAM Subaru, Stratus redrive.

do not archive.



 



 [quote][b]

- The Matronics Zenith-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith-List

_________________
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive.

Afterfxllc(at)aol.com
Guest

Posted: Mon Dec 03, 2007 3:01 pm Post subject: XL Landing gear nuts Torque

Talked to zenith today and asked if we torque the landing gear nut to the  specs or just snug and they said it can be torque to specs but good and tight is  fine also. I told them I would tighten mine down until the angle just started to  bend and give them the torque and they said they would post it in the  updates. It's funny how so many have been built and the question has never come  up.

  

 Jeff

  

  In a message dated 12/2/2007 12:48:15 P.M. Eastern Standard Time,  Afterfxllc(at)aol.com writes:

  	  Quote: 	
		     I don't think that is correct... you don't want any flexing at the angle.    I torque mine to the proper torque specs for the nut and it did bend the angle    slightly. I would call Zenith on this one. If you look at the photos theirs is    bent also.

    

   Jeff

    

      In a message dated 12/2/2007 8:32:29 A.M. Eastern Standard Time,    bryanmmartin(at)comcast.net writes:

    	  Quote: 	
		  If you      torque it to the standard value for that nut, you will bend the aluminum      extrusion holding the gear spring in place. The gear spring has to pivot      some at that point as you load and unload the mains. I just tightened the      nuts until the rubber strips were compressed a bit and the extrusion wasn't      distorted. It's kind of like the engine mount bolts with the rubber cones,      they need to be snug but not over tightened.      

     

          On Dec 2, 2007, at 7:02 AM, chris Sinfield wrote:

      	  Quote: 	
		         --> Zenith-List message posted by: "chris        Sinfield" <chris_sinfield(at)yahoo.com.au (chris_sinfield(at)yahoo.com.au)>

       



       Hi all

       Today we stood it on the gear, what a sight. Now        for the life of me I cant find the torque required on the nut before I        drill it and split pin. Those of you how are already there where did you        find it ? Is it just the normal torque for that size nut from the figures        on the new CS page 35?? 

       



       Chris.

       



	






          -- 

     Bryan Martin

     N61BM, CH 601 XL, 

     RAM Subaru, Stratus redrive.

 	  Quote: 	
		  



://www.matronics.com/contribution">http://www.matronics.com/contribution

f="http://www.matronics.com/Navigator?Zenith-List">http://www.matronics.com/Navigator?Zenith-List

.matronics.com/">http://forums.matronics.com



	
	




         hottest products and top money wasters of 2007.

 	  Quote: 	
		  



://www.matronics.com/contribution">http://www.matronics.com/contribution

f="http://www.matronics.com/Navigator?Zenith-List">http://www.matronics.com/Navigator?Zenith-List

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hottest products and top money wasters of 2007.

  [quote][b]

- The Matronics Zenith-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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