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  #1  
Old 06-30-2018, 03:02 PM
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kbalch kbalch is offline
 
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Location: Clermont, FL
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Default Elevator riveting question...

I've been motoring along pretty well and making good progress nearly every day. One task today, however, has seen me talking to myself out in the garage as I tried to figure it out.

On page 09-18 Step 5, how the heck is one meant to buck those rivets along the rear spar?!? I have the special bucking bar, but that's intended to utilize leverage (when doing the second skin) unavailable with the assembly clamped to the edge of the workbench for this step per the plans. None of my many other bucking bars fit suitably inside the rear spar. Is it a two-person job with the special bar? It'll take two hands on that bar and I'm short a third hand to run the rivet gun...

What am I missing?
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RV-8 N118KB (sold)
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  #2  
Old 06-30-2018, 04:17 PM
Reflex Reflex is offline
 
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Location: Kansas
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Not sure if the pictures below are going to answer your questions, but maybe they'll help. I clamped the skeleton down firmly and that left me two hands to rivet. Used a standard tungsten bar. It's been a while, but I don't recall having a clearance issue.

The straight edge you see in the first picture is made from 1" angle with a 2" flat riveted to one side. Used double flush rivets so it would sit flat.

Used this bucking bar: http://www.cleavelandtool.com/Tungst...uctinfo/BBT41/



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  #3  
Old 06-30-2018, 06:09 PM
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kbalch kbalch is offline
 
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Quote:
Originally Posted by Reflex View Post
Not sure if the pictures below are going to answer your questions, but maybe they'll help. I clamped the skeleton down firmly and that left me two hands to rivet. Used a standard tungsten bar. It's been a while, but I don't recall having a clearance issue.

The straight edge you see in the first picture is made from 1" angle with a 2" flat riveted to one side. Used double flush rivets so it would sit flat.

Used this bucking bar: http://www.cleavelandtool.com/Tungst...uctinfo/BBT41/
Thanks! I have it clamped down firmly, but the only bucking bar I have small enough to get in there just isn't very substantial. I think that tungsten bar is the way to go. I'll order it on Monday, though the holiday next week will delay delivery. Maybe I'll get started on the tailcone while I wait...
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RV-8 N118KB (sold)
RV-14A #140494 (Fuselage underway)
N114KB (reserved)
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  #4  
Old 06-30-2018, 08:35 PM
Davoakes@att.net Davoakes@att.net is offline
 
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Location: Greenfield, IN
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Are you aware that there is a special bucking bar that is to be used in your building of the empennage? Look for it at Cleveland tools marked as a tool for the RV -10. You need it for your build also. It cost about 40.00.
I think it is used for the elevator with the trim tab, and maybe the other too. Can't remember now.
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  #5  
Old 06-30-2018, 08:50 PM
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kbalch kbalch is offline
 
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Yes. As I said, I have that special bucking bar, but it’s meant to aid with the second skin, not the first. I’ll see tomorrow if I can somehow make it work and, if not, will order the little tungsten bar on Monday.
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RV-8 N118KB (sold)
RV-14A #140494 (Fuselage underway)
N114KB (reserved)
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  #6  
Old 06-30-2018, 10:26 PM
Davoakes@att.net Davoakes@att.net is offline
 
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Ok, I built both elevators myself with no help, so I am not sure exactly what you are referring. Sorry if I spoke out of turn.
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  #7  
Old 07-01-2018, 01:11 AM
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RV-14E RV-14E is offline
 
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You can reach that elevator rear spar by hanging the edge over the work table and reaching up with a bucking bar. It's possible solo. I did it with help:

http://rv-14a.blogspot.com/2014/02/e...ront-spar.html

Using a tungsten bucking bar makes it easy. There are several available. For the elevator rear spar, I used this one:

https://www.yardstore.com/riveting/b...gsten-1-66-lbs



At the bottom of this page, you can see a smaller one that I later used for tighter spaces. It would also work for the elevator rear spar.

http://rv-14a.blogspot.com/2015/09/f...gage-area.html




The special bucking bar, outlined on page 09-17, is used at a different stage, on page 09-20. It is used when you put the second skin on the elevator (since you can't reach into the C-channel of the spar with both skins on).

For most of those rivets, I used the special bucking bar with help: http://rv-14a.blogspot.com/2014/02/e...ront-spar.html

For the few rivets along the spar that the plans have you buck later, I figured out one way to do it solo: http://rv-14a.blogspot.com/2014/06/e...rear-spar.html

Last edited by RV-14E : 07-01-2018 at 10:42 AM.
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  #8  
Old 07-01-2018, 09:02 AM
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kbalch kbalch is offline
 
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Location: Clermont, FL
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Quote:
Originally Posted by RV-14E View Post
You can reach that elevator rear spar by hanging the edge over the work table and reaching up with a bucking bar. It's possible solo. I did it with help:

http://rv-14a.blogspot.com/2014/02/e...ront-spar.html

Using a tungsten bucking bar makes it easy. There are several available. For the elevator rear spar, I used this one:

https://www.yardstore.com/riveting/b...gsten-1-66-lbs
Thanks for the links and confirmation that the little tungsten bar is the way to go. Yardstore is a new one for me and a great find. I've just ordered the bar from them.
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RV-8 N118KB (sold)
RV-14A #140494 (Fuselage underway)
N114KB (reserved)
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  #9  
Old 07-05-2018, 06:59 PM
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bk1bennett bk1bennett is offline
 
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Location: Sachse, TX
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For me the section with the trim tab hinge was the hardest. Used a steel bucking bar and got acceptable results, but they are the ugliest rivets I have bucked so far. You have to buck by feel. I also made a couple of smilies in the skin. Not happy about it but it will suffice. Not going to redo the skins because of it
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