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  #1  
Old 09-17-2013, 07:18 PM
sbalmos's Avatar
sbalmos sbalmos is offline
 
Join Date: Oct 2011
Location: Liberty Twp, OH
Posts: 641
Default Inboard rear spar wing skin rivets

A question a week from me. I'm on a roll.

This past weekend, my dad, a family friend, and I were riveting the inboard wing skins. All was well, until I got to the inboard rear spar rivets, where the doubler fork and plate is already riveted to the spar with universal-head rivets. The thickness of the doublers and rivet heads was enough to interfere with trying to set the skin-to-spar rivets.

I'm still drilling out other rivets. But these ones worry me the most about how to set them. You can see how they literally were half-set. One I tried back-riveting, the other I tried with my squeezer. I'm not even sure my tungsten bar would be thin enough to fit between the unset tail and the edge of the doubler plate if I were to try flush riveting.

How'd the rest of you do these?

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Cincinnati, OH, KHAO
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  #2  
Old 09-17-2013, 07:34 PM
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Andrew M Andrew M is offline
 
Join Date: Aug 2006
Location: Secluded Lake,Alaska (AK49)
Posts: 359
Default Gun and bar

I used a gun and bar with one face cut at about a 30 degree angle.
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A&P, IA
-9 empennage
Wings arrived 12 JAN 13
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  #3  
Old 09-17-2013, 07:38 PM
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DaleB DaleB is offline
 
Join Date: Sep 2012
Location: Omaha, NE (KMLE)
Posts: 2,247
Default

I ran into the same thing on my -7. I used an old wood chisel. I laid the wing on the work bench with some carpet under it to prevent scratches. Then I slid the trailing edge about 6" off the edge of the carpet and used Styrofoam blocks to raise the leading edge so the trailing edge was flat against the carpet - and my back riveting plate. I laid the chisel down against the rivet shanks and used it as a flat set. I hit it with the rivet gun with a real flat set. It worked fine, I didn't even have to drill out the ones that had the shanks half-smashed like yours, they set pretty nice and flat.

Hope this helps. I couldn't even wedge the angled face of my tungsten bar under there to get the last half dozen or so, but the chisel worked like a charm.
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Omaha, NE
RV-12 # 222 N980KM "Screamin' Canary" (bought flying)
Fisher Celebrity (under construction)
Previous RV-7 project (sold)
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  #4  
Old 09-17-2013, 07:48 PM
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sbalmos sbalmos is offline
 
Join Date: Oct 2011
Location: Liberty Twp, OH
Posts: 641
Default

Hrm. I like that idea Dale. Dad's an ex-woodshop teacher, so plenty of old dull chisels sitting around. I'll have him bring some for this weekend's work session. The rest of the rear spar rivets I'm going to squeeze once my 4" yoke comes in from Avery later this week.

Thanks!
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Cincinnati, OH, KHAO
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  #5  
Old 09-17-2013, 07:51 PM
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airguy airguy is offline
 
Join Date: Oct 2006
Location: Garden City, Tx
Posts: 5,145
Default

Yup - wood chisel would probably work, I used a big flat blade screwdriver with the tungsten bucking bar behind it, and the gun on the factory head.
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Greg Niehues - SEL, IFR, Repairman Cert.
Garden City, TX VAF 2020 dues paid
N16GN flying 700 hrs and counting; IO360, SDS, WWRV200, Dynon HDX, 430W
Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now.
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  #6  
Old 09-18-2013, 08:47 AM
Ranger Ranger is offline
 
Join Date: Aug 2009
Location: La Grande, Oregon
Posts: 32
Default I used this...

...from Cleaveland
http://www.cleavelandtool.com/Footed...ductinfo/BB30/
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RV-9A N214DX
Flying since 7/26/13
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  #7  
Old 09-18-2013, 09:07 AM
JSOliveira JSOliveira is offline
 
Join Date: Jul 2011
Location: Port Townsend, Washington
Posts: 77
Default

Used 4 inch yoke which has a thin side, with a pneumatic squeezer. I don't remember any particular problem.
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RV9a N709RV
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  #8  
Old 09-18-2013, 09:11 AM
Paul B Paul B is offline
 
Join Date: Jan 2009
Location: Beautiful downtown Winnemucca
Posts: 87
Default make a tool

A lot of the building fun is making/modifying tools. I believe I used a no-hole yoke in my squeezer. I ground (grinded?) the top and sides of the yoke so it would fit in the space available.
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Building RV-9
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  #9  
Old 09-18-2013, 09:16 AM
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longranger longranger is offline
 
Join Date: Mar 2007
Location: 45G, Brighton, MI
Posts: 1,867
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Tungsten bucking bar with a 15-degree face. Best $125 I've spent so far.
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Miles (VAF# 1238, Paid up as of 2018)
RV-7 TU 904KM (reserved)
Wings Fitted and Finish Kit on site

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1955 Cessna 170B flying since 1982

'To get something you never had, you have to do something you never did.' -Unk.
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  #10  
Old 09-18-2013, 11:59 AM
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cln1owner cln1owner is offline
 
Join Date: Jan 2006
Location: Ehprata, WA
Posts: 318
Default

4 inch no hole yoke, "adjusted" the tip with the bench grinder to fit.
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Nate Benson
Ephrata, WA
RV9A/Slider N608MA
Flying

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