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Wing Bolt Installation made easy or at least precise

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AirMike

Joined: 27 Feb 2007
Posts: 514
Location: Nevada

Posted: Sun Jun 28, 2009 5:47 pm Post subject: Wing Bolt Installation made easy or at least precise

The day finally came to put in the final close tolerance wing bolts. We all know how much we do NOT want to screw up this job. With no room for error I was quite nervous approaching the task. Best to have three people for the job



I used three drift pins in the first wing and four in the second. I recommend that you spend a few extra bucks and get 4 in each wing. Or do one at a time with four. This gets the wing and fuse more aligned. It may be only a few 10,000 of an inch but it matters. Also remove the fore and aft spar bolts if previously installed It helps twist the wing to align the holes.



Then I got some dry ice to cool the bolts down really low. I took the 8 large bolts and put them on the 3M wheel VERY LIGHTLY to remove the minute ridge between the threads and the shaft of the bolts. This way if you are hanging on a misalignment between the pieces, it will slide on thru without buggering the junction area.



Put the bolts in the cooler for 15-20 minutes but not right on the dry ice. Then put on a pair of latex/nitrile gloves. As you need the bolts, pull them out and holding them by the threads spray the shaft with LP2 or LP3. Then slap it in the hole. use a 12"x1"x2" piece of oak or hardwood as a dowel to push the on thru. Then use a rubber mallet or if needed - your rivet gun to push the bolts on thru. Have one friend lift the wing to unload the end and have the other friend hold the wood dowel against the bolt so that it does not slip off. I had to rivet a few bolts really hard, but one bolt actually slid in with a press of the fingers. Neeedless to say when they heated up to room temp they are in VERY solid. I also heated the spars with a heat gun between the top bolts and the bottom bolts. Replacing the front and rear spar bolts afterward is no sweat with your wingtip friend twisting and moving the wing for and aft.

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ricksked(at)embarqmail.co
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Posted: Sun Jun 28, 2009 6:50 pm Post subject: Wing Bolt Installation made easy or at least precise

Ummm. Yeah.... I put them in the cooler with the water bottles....used two 3/8 standard bolts with the threads cut off as guide pins...some 30W oil on the cold bolt shafts and a ball peen hammer to tap them in....go figure....never thought of doing all that other stuff.... They seem to work OK....



Rick Sked

N246RS

Do not archive

Sent via BlackBerry by AT&T



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cjay

Joined: 15 Dec 2007
Posts: 53

Posted: Tue Jun 30, 2009 2:45 pm Post subject: Re: Wing Bolt Installation made easy or at least precise

any idea where to get LP2 or 3?  What is it?



cjay

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Bob Turner

Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA

Posted: Tue Jun 30, 2009 3:00 pm Post subject: Re: Wing Bolt Installation made easy or at least precise

I believe he meant "LPS-2" or "LPS-3". These are spray lubricants available at many hardware stores (ACE, etc.).

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Bob Turner
RV-10 QB

ricksked(at)embarqmail.co
Guest

Posted: Wed Jul 01, 2009 2:54 am Post subject: Wing Bolt Installation made easy or at least precise

Use caution using LPS or any silicone based spray lube around the airframe if you plan to paint anytime soon  The residue/overspray from spraying can settle into the dimples and is a bi$¥h to properly prep for paint...trust me These products are taboo in all paint shops. That's why I used a coat of light oil...no spray silicones



Rick Sked

N246RS

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