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  #11  
Old 08-14-2018, 11:44 AM
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airguy airguy is offline
 
Join Date: Oct 2006
Location: Garden City, Tx
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My experience is that an assistant at the wing tip to lift and wiggle the wing is definitely needed, the clearance on these bolts is so small that ANY misalignment will cause the bolts to bind. You'll need one set of hands in the cockpit pushing on the bolts and another on the wingtip wiggling up/down and fore/aft to get the bolts to slip in. The bullet bolts you have in there are not close-enough on tolerance to get the others to line up exactly, they are for gross location only.

Do NOT ream the holes.
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Built an off-plan 9A with too much fuel and too much HP. Should drop dead any minute now.

Last edited by airguy : 08-14-2018 at 11:46 AM.
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  #12  
Old 08-14-2018, 04:17 PM
whd721 whd721 is offline
 
Join Date: Oct 2007
Location: Beaverton, OR
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Two tips that worked for me.

Polish the hardware store bolts in a drill press with sandpaper till smooth and clean. Lube them well.

Pre fit the temp bolts in the wing before attempting to fit it to the RV. It should slide smoothly into both sides of each wing (Wing spar side and fuselage center section side side) before you start. That way you know the bolts are a smooth fit through all the assembly holes, without the alignment issue.

Good Luck and proceed slowly, without major force being involved.
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  #13  
Old 08-15-2018, 05:08 PM
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sglynn sglynn is offline
 
Join Date: Mar 2008
Location: Anacortes, WA
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Default Wing Bolts - How to get them in

Wiggling the wing while inserting the bolts made all the difference. Cold, ice, freezing of no obvious value. Did use STP and thin oil. With a helper wiggling the wing the top 4 wing bolts went in with just a little assistance from a hard plastic hammer. Just needed light taps. I also had bullet pins in from the wrong direction and they backed out as final bolts went in. Top four down.

Tonight I'll try to get the bottom four bolts in. Can't use the bullet bolts down there because I can't push them out from the front side. And pulling them out is too hard. I'll just tap them forward. This is a -7A so gear weld mount is a challenge.
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  #14  
Old 08-16-2018, 10:24 AM
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sglynn sglynn is offline
 
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Location: Anacortes, WA
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Default Installing Wing Bolts

Follow-up for future builders who are installing the wing bolts. This is a 7A.
I did get the bottom four bolts in with no issues last night. I did NOT use freezing the bolts. I merely used STP and thin oil on the bolts and I brushed some in the holes. I used a gun barrel cleaner to brush out the holes and deposit some thin oil. The lower four bolts just tapped right in. I think the top 4 bolts lined up the interface so no bullet bolts were needed on the lower. And no wiggling needed on the lower bolts either. Watch out for your hammer hitting the push rod. Once I had the bolts showing a couple threads on the forward side, I held the nuts in place with hemostats and turned the bolts with a ratchet. Eventually the nut grabbed and then I just kept turning the bolt until the nut had pulled the bolt all the way in.

To me, putting on the wings is a path of no return and has been the most stressful part of the build. It was more concerning then the canopy. I hope I thought of everything needed before installing them.
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