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  #1  
Old 07-12-2021, 12:46 PM
StressedOut StressedOut is offline
 
Join Date: Jun 2017
Location: Fullerton, CA
Posts: 161
Default Flush Riveting Results

I finished double flush riveting the trim tab trailing edge and these are the results (I hope this photo comes through). The shop head is sitting about 0.030 in. proud from the skin.

Before I rivet the TE on the rest of the elevator tomorrow I'd like some confirmation that this is acceptable or if it needs to be flush with the skin. My main fear is cracking the rivet. I made three passes on each rivet to get this far because I was concerned about keeping the edge straight. So far the trim tab TE is straight to 0.020 in. along the entire length.

On a related note, the plans call out using a AD3-4.5 rivet. I had another location that had to be double flush riveted and I substituted a half size small length rivet and got great results. It seems that using a AD3-4 here would be a bit easier to make it flush on the shop head.

What are your recommendations? Should I make another pass to try and get it flush or just leave it alone? Should I use a AD3-4 on the main TE?
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Art Jackson
RV-14A Kit#140433
Completed: Vertical Stab/Horizontal Stab
Scrapped: Rudder
Working on: Empennage (Elevator, Rudder #2, Aft Fuselage)
Ordered: Wing Kit (Arrives March 2021)
Construction log - mykitlog.com/ajackson
Dues paid on March 2021
Member of EAA Chapter 92 (KCNO)
Pet peeve: "Lose" (rhymes with "booze") is the opposite of "find". "Loose" (rhymes with "juice") means "not tight".

Last edited by StressedOut : 07-12-2021 at 03:03 PM. Reason: Added picture
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  #2  
Old 07-12-2021, 12:49 PM
jrtens's Avatar
jrtens jrtens is offline
 
Join Date: Apr 2018
Location: Utah
Posts: 210
Default

Attach your photo using the paperclip icon.
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2019 12iS SLSA
Salt Lake Int'l
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  #3  
Old 07-12-2021, 12:53 PM
chubsterini chubsterini is offline
 
Join Date: Jun 2021
Location: California
Posts: 103
Default image attachment common error

Make sure you click "upload" before closing the attachment dialog box. I've noticed this is a common error: people think the attachment has happened as soon as they've finished selecting their local file.
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  #4  
Old 07-12-2021, 01:00 PM
chubsterini chubsterini is offline
 
Join Date: Jun 2021
Location: California
Posts: 103
Default image attachment common error

Quote:
Originally Posted by chubsterini View Post
Make sure you click "upload" before closing the attachment dialog box. I've noticed this is a common error: people think the attachment has happened as soon as they've finished selecting their local file.
... a little self reference paradox for your enjoyment.
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  #5  
Old 07-12-2021, 03:18 PM
StressedOut StressedOut is offline
 
Join Date: Jun 2017
Location: Fullerton, CA
Posts: 161
Default Error fixed

Thanks everybody. I've fixed the original post. I tried to use an image hosting server, but it didn't work. The attachment method is by far easier to use.
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Art Jackson
RV-14A Kit#140433
Completed: Vertical Stab/Horizontal Stab
Scrapped: Rudder
Working on: Empennage (Elevator, Rudder #2, Aft Fuselage)
Ordered: Wing Kit (Arrives March 2021)
Construction log - mykitlog.com/ajackson
Dues paid on March 2021
Member of EAA Chapter 92 (KCNO)
Pet peeve: "Lose" (rhymes with "booze") is the opposite of "find". "Loose" (rhymes with "juice") means "not tight".
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  #6  
Old 07-12-2021, 03:43 PM
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wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 4,669
Default Double flush

Looks kinda like they are a bit too short to fully fill the dimple. It's also possible they work hardened and refused to spread out. Not sure I would bother drilling them. They look structurally sound.
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Larry Larson
Estes Park, CO
wirejock at yahoo dot com
Donated 01/01/2021, plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ hours)
Empennage, wings, fuse, finishing kit, now FWF
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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  #7  
Old 07-12-2021, 05:13 PM
StressedOut StressedOut is offline
 
Join Date: Jun 2017
Location: Fullerton, CA
Posts: 161
Default

Quote:
Originally Posted by wirejock View Post
Looks kinda like they are a bit too short to fully fill the dimple. It's also possible they work hardened and refused to spread out. Not sure I would bother drilling them. They look structurally sound.
They're the size called out in the plans. The work hardening is what I'm worried about. I might try to squeeze one rivet to flush and see if it works. If I crack it it's not an issue to drill out one. I just don't want to do it for all of them.
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Art Jackson
RV-14A Kit#140433
Completed: Vertical Stab/Horizontal Stab
Scrapped: Rudder
Working on: Empennage (Elevator, Rudder #2, Aft Fuselage)
Ordered: Wing Kit (Arrives March 2021)
Construction log - mykitlog.com/ajackson
Dues paid on March 2021
Member of EAA Chapter 92 (KCNO)
Pet peeve: "Lose" (rhymes with "booze") is the opposite of "find". "Loose" (rhymes with "juice") means "not tight".
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  #8  
Old 07-13-2021, 05:25 AM
AlexC AlexC is offline
 
Join Date: May 2018
Location: Oviedo, FL
Posts: 91
Default

I used this squeezer set from Cleaveland Tool:

https://www.cleavelandtool.com/produ...31588459937854

This die set will be able to squeeze those shop heads flatter.

_Alex
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2021 RV-14A: Flying as of 4/13/21 - Phase 1 completed!
1999 Cessna 182S - Sold
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  #9  
Old 07-13-2021, 06:32 AM
JeremyL JeremyL is offline
 
Join Date: Aug 2020
Location: Maurertown,Virginia
Posts: 119
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Quote:
Originally Posted by AlexC View Post
I used this squeezer set from Cleaveland Tool:

https://www.cleavelandtool.com/produ...31588459937854

This die set will be able to squeeze those shop heads flatter.

_Alex
I have these and I am about 2 days from tackling the trailing edge on a 7. Have you used them and what do you think of them? Any tips or considerations?
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https://eaabuilderslog.org/?s=N524JL
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  #10  
Old 07-13-2021, 06:19 PM
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tyconnell tyconnell is offline
 
Join Date: Jul 2007
Location: Keller, TX
Posts: 254
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Quote:
Originally Posted by JeremyL View Post
I have these and I am about 2 days from tackling the trailing edge on a 7…. Have you used them and what do you think of them? Any tips or considerations?
They made it stupid easy.

I partially set the rivets, starting from the center, and alternating out towards the ends. An old Avery hand squeezer was great for this. Then I went back over them with a pneumatic to finish.
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