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  #1  
Old 12-13-2015, 07:54 PM
Aero_Octaveus Aero_Octaveus is offline
 
Join Date: Aug 2014
Location: Edmonton, AB
Posts: 241
Default Slightly Oblong hole in Wing Spar

Well.. I've managed to put myself in a bit of a spot. While match drilling the W-726 spacers/W-731 Tie-down to the Wing Spar for the AN3 bolt, one of the holes managed to get slightly oblong in the Spar Web. At its widest point its 0.207" across. The hole in the spacer is good as well as the Tie down bar.

Do I build on?? Or go to a plan B?

http://3.bp.blogspot.com/-Aoqfouji2u...0/IMG_6758.JPG

http://1.bp.blogspot.com/-5yqpiV4m90...0/IMG_6760.JPG
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Last edited by Aero_Octaveus : 12-13-2015 at 10:05 PM.
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  #2  
Old 12-13-2015, 07:58 PM
wirejock's Avatar
wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 4,773
Default Bigger bolt

Quote:
Originally Posted by Aero_Octaveus View Post
Well.. I've managed to put myself in a bit of a spot. While match drilling the W-726 spacers/W-731 Tie-down to the Wing Spar for the AN3 bolt, one of the holes managed to get slightly oblong in the Spar Web. At its widest point its 0.207" across.

Do I build on?? Or go to a plan B?

http://3.bp.blogspot.com/-Bb6HZY3Cj3...0/IMG_6758.JPG

http://1.bp.blogspot.com/-E_P08EOpyS...0/IMG_6760.JPG
Ask Vans for the record but one size up would probably be fine. Step away from the clif.
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Donated 12/01/2021, plus a little extra.
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Last edited by wirejock : 12-13-2015 at 09:05 PM.
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  #3  
Old 12-13-2015, 09:45 PM
gtmule gtmule is offline
 
Join Date: Oct 2007
Location: Macon, GA
Posts: 507
Default

So the hole in question just attaches the (top of the) tiedown block to the spar web? I guess I should say "ask Van" but I'm pretty sure they'll tell you you're fine as-is, there shouldn't be much if any load transferred by that fastener during maneuvers. If it attached the spar cap to the web it might be more problematic. If you wanted to oversize it you'd have to go to 1/4"...which would probably be fine, too, assuming you had proper ED on the other parts.
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  #4  
Old 12-13-2015, 10:21 PM
Aero_Octaveus Aero_Octaveus is offline
 
Join Date: Aug 2014
Location: Edmonton, AB
Posts: 241
Default Attachment for aileron bellcrank

Correct. It is the bottom inboard hole (right wing) that is the bolt attachment for the W-823PP bottom aileron bellcrank bracket/Thru spar/Thru W-726 Spacer/Into nutplate on W-731 Tie-Down Bar.

All the other holes are very nice.

http://2.bp.blogspot.com/-MMlPx8AKex...0/IMG_6763.JPG

http://2.bp.blogspot.com/-LRDXeYM4HB...0/IMG_6761.JPG

Ultimately I will send an email to vans on this one. Just not sure If I should be hyperventilating yet or not.

If I have to go up to and AN4 bolt. The next trick will be figuring out the nut plate that will fit on the spacer.
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Garet Hess - Edmonton, AB
RV-7A - Emp and Wings Done. Working on fuse
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http://garetsrv.blogspot.ca/
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  #5  
Old 12-15-2015, 02:58 PM
Aero_Octaveus Aero_Octaveus is offline
 
Join Date: Aug 2014
Location: Edmonton, AB
Posts: 241
Default AN4 Bolt

Yup, Van's recommends AN4 bolt.

I think I also need to give consideration to a different nutplate. The K1000-4 is a no. Might have to go with a MK1000-4 or an MK2000-4.

Does anyone think I should be concerned with edge distance on the W-726 spacers/W-731 Tie-down going up to the AN4 or am I simply overthinking it?

http://4.bp.blogspot.com/-0SbTMdGIDU...0/IMG_6769.JPG
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Garet Hess - Edmonton, AB
RV-7A - Emp and Wings Done. Working on fuse
2020 Donation Current

http://garetsrv.blogspot.ca/

Last edited by Aero_Octaveus : 12-15-2015 at 08:30 PM.
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