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10-24-2011, 11:38 AM
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Join Date: Jun 2010
Location: McKinney, TX
Posts: 689
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Concerned about tank end ribs
My fluting on the end ribs of my right fuel tank have created some gaps between the flange and the skin that concern me. I might be making a mountain out of a mole hill, but these gaps make me wonder if I have too much space for ProSeal to properly fill.
Take a look and let me know what you think.

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Gil Brice
McKinney, TX EAA-1246
RV7 - Working on fuse, fuel, brakes etc...
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10-24-2011, 12:27 PM
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Join Date: Oct 2007
Location: In New Braunfels, ist das Leben schön!
Posts: 871
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Gil,
I'm no expert but I would be very worried about leaks from the fluting gaps. Seems like it would take much too much proseal to fill the gap. I'd call Van's before proceeding. Double check Van's instructions about buttering the flanges and read some of Rick Galatti's (sp?) posts about proseal. I didn't flute the end ribs on the one set I built.

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Larry New
RV-7A - Built, flying 900+ hrs
RV-10 - Built, flying 2.9 hrs
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VAF Paid - Annual Autodraft
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10-24-2011, 04:16 PM
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Join Date: Mar 2008
Location: Ramona, CA
Posts: 2,370
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Butter up those end rib flanges and put a nice fillet on the inside and the sealant should be able to stop any leaks.
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10-24-2011, 04:42 PM
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Join Date: Dec 2006
Location: Paso Robles, CA
Posts: 1,177
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Your Fluting Pliers?
Your Fluting Pliers... uh... make huge gaps.
The ones I have keep the pinches much cleaner and tighter, you could do more crimps closer and sharper with better pliers. Get a hold of Avery, Cleaveland, or Brown tools, any one of them could better advise you. 
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10-24-2011, 05:51 PM
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Join Date: Feb 2010
Location: Vancouver, BC, Canada
Posts: 860
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Flutes
Look about the same as mine. As previous posters said put lots of proseal on the faying surfaces, and make a nice round fillet on the inside. Also put an overlap fillet on the outside. Search the forums under proseal. Rick Galati (Rick6a) has written some good advice and references workmanship standards.
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Terry Edwards
RV-9A (Fuselage)
2020/2021 VAF Contribution Sent
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10-24-2011, 06:00 PM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,686
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If you flute between each set of rivets than it takes much smaller flutes to make the part conform. I would flatten those large ones out and make smaller ones at the additional locations as required. Then "butter" both rib and skin before assy, then add a nice fat fillet on the inside all the way around.
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Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
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RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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10-24-2011, 06:28 PM
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Join Date: Aug 2005
Location: Atlanta, GA
Posts: 4,219
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Quote:
Originally Posted by Walt
If you flute between each set of rivets than it takes much smaller flutes to make the part conform. I would flatten those large ones out and make smaller ones at the additional locations as required. Then "butter" both rib and skin before assy, then add a nice fat fillet on the inside all the way around.
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Do this. You'll be happy.
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Kyle Boatright
Marietta, GA
2001 RV-6 N46KB
2019(?) RV-10
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10-24-2011, 08:46 PM
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Join Date: Jul 2009
Location: Petaluma, CA
Posts: 233
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nah
those will be fine with enough proseal. While my flutes weren't that large, most of my proseal on the end ribs were inside... in a fillet seal. If it doesn't get past the fillet seal, it won't matter how much proseal is in your flutes.
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Bill Mason
RV7 SB in construction
Avionics, Wiring, FWF, interior, and paint to go.
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10-24-2011, 09:20 PM
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Join Date: Jan 2010
Location: Hampshire, IL
Posts: 276
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What Walt said.
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Ed Martin
Bluskydtl
RV7
DKB
Donations 1/19 & 6/19
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10-24-2011, 10:35 PM
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Join Date: Sep 2010
Location: Airdrie AB Canada
Posts: 172
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You'll be fine, take a look at the gap that needs to be sealed in the corners where the end ribs meet the baffle. Vans tells us to put a generous glob there to prevent leaks.
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