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04-28-2015, 11:19 AM
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Join Date: Oct 2014
Location: Albany,ny area
Posts: 63
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Which rivets after sealing tanks?
Just cleaned slosh in 1991 rv4, pulled off entire rear bulkheads, MEK and soda blasted clean. I'm not the builder, but which rivets do I use to fasten rear bulkhead on? Looks like plans call for AN426AD3-3.5, but I wasn't planning on bucking these, besides, how could you unless I cut out access holes. Builder used blind rivets....any info?
Thanks, Tom
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Cub/supercub builder/restorer
39 J3 on floats
53 supercub
47 pa11
91 RV 4
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04-28-2015, 12:23 PM
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Join Date: Nov 2008
Location: Baton Rouge, LA
Posts: 669
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sealed blind rivets
Vans sells sealed blind rivets for that job. I think the part number you want is AD-42, but call them to verify.
Last edited by jpowell13 : 04-28-2015 at 12:33 PM.
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04-28-2015, 04:14 PM
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Join Date: Oct 2005
Location: Estes Park, CO
Posts: 3,931
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Rivets
The rivets going through the z-brackets, baffle and into the ribs are blind. The rivets along the skin to baffle are the AN426AD3-3.5.
Unless the builder installed the baffle inside out but as you mention, there's no way to buck them.
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Larry Larson
Estes Park, CO
http://wirejockrv7a.blogspot.com
wirejock at yahoo dot com
Donated 12/03/2019, plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ hours)
HS SB, empennage, tanks, wings, fuse, working finishing kit
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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04-28-2015, 04:40 PM
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Join Date: Aug 2012
Location: Lufkin Tx
Posts: 689
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I just did the exact same thing on my '91 RV-4 tanks. I re-sealed every rib and stiffener along with sealing all the rivets. I bought new rear baffles and the above mentioned sealed AN4-4 countersunk rivets for the flanges from VANS. For the rivets along the backside, you can use regular blind rivets and seal the heads. No leaks on the flange or back rivets. You may find that if the fuel senders are original, they may need to be replaced. Mine were trashed.
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Arlie Conner (A&P)
RV-4 (N124TT) Sold
RV-8 (N269CP) Sold
RV-4 (N684ML) completed 3-17-19
KOCH Nacogdoches
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05-12-2015, 10:05 AM
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Join Date: Oct 2014
Location: Albany,ny area
Posts: 63
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Thanks ACAM....
Did you proseal, wait, then rivet, if so how long?
Or did you proseal and immediately rivet?
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Cub/supercub builder/restorer
39 J3 on floats
53 supercub
47 pa11
91 RV 4
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