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Wing bolt torque values

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december29(at)bellsouth.n
Guest

Posted: Wed Jan 31, 2007 10:32 am Post subject: Wing bolt torque values

Hi there,

Attaching the wings and looking for torque settings for the bolts. AN-4 at 

50-70 inch pounds (two bolts into the center web of the spar), AN5 at 100-140 

inch pounds (rear spar). Now for the close tolerance bolts I am thinking to 

use the approx diameter and go with those settings. For the big boys, NAS 1307-

50 (they approx 7/16) so going 450-500 inch pounds and the smaller NAS1304-50 

(approx 1/4) I am going 50-70 inch pounds.



This is for an RV-8 with the new wing. Does this sound right? Does anyone 

have any "better" numbers?

Thanks for the help.



John

80002

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Hopperdhh(at)aol.com
Guest

Posted: Wed Jan 31, 2007 11:51 am Post subject: Wing bolt torque values

In a message dated 1/31/2007 1:36:14 PM Eastern Standard Time, 

december29(at)bellsouth.net writes:




Hi there,

Attaching the wings and looking for torque settings for the bolts. AN-4 at 

50-70 inch pounds (two bolts into the center web of the spar), AN5 at 100-140 

inch pounds (rear spar). Now for the close tolerance bolts I am thinking to 

use the approx diameter and go with those settings. For the big boys, NAS 

1307-

50 (they approx 7/16) so going 450-500 inch pounds and the smaller NAS1304-50 

(approx 1/4) I am going 50-70 inch pounds.



This is for an RV-8 with the new wing. Does this sound right? Does anyone 

have any "better" numbers?

Thanks for the help.



John

80002



John,



I like that serial number.



Those are the numbers I used on my -7A and the wings haven't fallen off in 

over 2 years.



Dan

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december29(at)bellsouth.n
Guest

Posted: Thu Feb 01, 2007 8:08 am Post subject: Wing bolt torque values

Dan,

  Thanks for the quick reply!  Going to try the dry ice and Boelube trick to get the bolts in.  Yeah,  when you have tail kit # 2 you are taking slow building to a new level. ha,ha  But she will fly this year.  OSH is the goal.



Later,



John



do not archive

 	  Quote: 	
		   

 From: Hopperdhh(at)aol.com

 Date: 2007/01/31 Wed PM 02:49:13 EST

 To: rv-list(at)matronics.com

 Subject: Re: Wing bolt torque values

 

 

 

 In a message dated 1/31/2007 1:36:14 PM Eastern Standard Time, 

 december29(at)bellsouth.net writes:

 

 

 Hi there,

 Attaching the wings and looking for torque settings for the bolts. AN-4 at 

 50-70 inch pounds (two bolts into the center web of the spar), AN5 at 100-140 

 inch pounds (rear spar). Now for the close tolerance bolts I am thinking to 

 use the approx diameter and go with those settings. For the big boys, NAS 

 1307-

 50 (they approx 7/16) so going 450-500 inch pounds and the smaller NAS1304-50 

 (approx 1/4) I am going 50-70 inch pounds.

 

 This is for an RV-8 with the new wing. Does this sound right? Does anyone 

 have any "better" numbers?

 Thanks for the help.

 

 John

 80002

 

 John,

 

 I like that serial number.

 

 Those are the numbers I used on my -7A and the wings haven't fallen off in 

 over 2 years.

 

 Dan

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Hopperdhh(at)aol.com
Guest

Posted: Thu Feb 01, 2007 8:22 am Post subject: Wing bolt torque values

In a message dated 2/1/2007 11:11:06 AM Eastern Standard Time, december29(at)bellsouth.net writes:

  	  Quote: 	
		  --> RV-List message posted by: <december29(at)bellsouth.net>



Dan,

  Thanks for the quick reply!  Going to try the dry ice and Boelube trick to get the bolts in.  Yeah,  when you have tail kit # 2 you are taking slow building to a new level. ha,ha  But she will fly this year.  OSH is the goal.



Later,



John 	


 John,

  

 I don't think the dry ice is necessary, IMHO.  I just put some wheel bearing grease on the bolts -- avoiding getting any on the threads.  I tapped them in with a hammer and brass punch or block of hardwood.  Have someone hold up the wing tip as you tap.  You can feel when the bolt is going best and tell the person holding the wing to raise it more or less, "That's it, right there!"

  

 Dan

  

 do not archive

  [quote][b]

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lhelming(at)sigecom.net
Guest

Posted: Fri Feb 02, 2007 5:19 am Post subject: Wing bolt torque values

I put my bolts in the freezer of my refrigerator and transferred  them to the airport in a cooler to keep them cold.  A bit of grease and  they slid in very easily.  Minimize hammering in to avoid buggering up  the threads.  Larry in Indiana

 [quote]   ---

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Ed Anderson

Joined: 10 Jan 2006
Posts: 475

Posted: Fri Feb 02, 2007 6:11 am Post subject: Wing bolt torque values

Dan, I found that using a rivet gun worked excellent. for  getting bolts through the spar and bulkhead.    The small  magnitude (in force) rapid tapping made them go in much easier than any heavy  force.

  

 Ed

 [quote]   ---

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_________________
Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com

Hopperdhh(at)aol.com
Guest

Posted: Sat Feb 03, 2007 6:10 am Post subject: Wing bolt torque values

In a message dated 2/2/2007 8:23:39 AM Eastern Standard Time, 

lhelming(at)sigecom.net writes:

I put my bolts in the freezer of my refrigerator and transferred them to the 

airport in a cooler to keep them cold.  A bit of grease and they slid in very 

easily.  Minimize hammering in to avoid buggering up the threads.  Larry in 

Indiana



Larry,



For the record, hammering in didn't bugger up the threads at all.  You don't 

hammer on the threads.  The friction is along the shank of the bolt.  The 

threads are smaller in diameter than the shank.



I had the holes in alignment by using standard hardware store bolts first, 

then replacing them one by one with the close tolerance bolts.  Guess I should 

have gone into more detail.



Dan Hopper

RV-7A

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