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04-19-2017, 09:11 AM
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Join Date: Jun 2016
Location: Livermore, CA
Posts: 397
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Alodine or primer for the tank attach countersinks
Started on my RV-7A wings recently and the first task is to drill those big ol' countersinks on the spar for the tank attach screws. The instructions say to prime the freely drilled aluminum which is what I've done, but I've seen build logs where builders are using alodine on them instead. Is there a big benefit to doing it this way, or just personal preference? Don't want to start a primer war if that's all it is. Just wondering if it's worth considering cleaning out the primer and applying alodine instead, which wouldn't take too long.
By the way, coming straight from the gentle hand-holding empennage instructions, the wings feel like boot camp: "Welcome to the wings. NOW DROP AND GIVE ME 150 NUTPLATES!"  |
04-21-2017, 06:48 AM
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Join Date: May 2006
Location: Pocahontas MS
Posts: 3,884
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Alodine is technically lighter (though I doubt you could measure the difference there), and primer is a lot quicker & easier, unless you're using one of those one-step alodine pens to 'color' the places.
I certainly wouldn't change it if you've already primed.
If you think it's boot camp now, it will be a vaguely defined mission soon....
Charlie
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04-21-2017, 07:32 AM
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Join Date: Mar 2008
Location: Dublin, CA
Posts: 1,259
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It's much simpler to just mask and prime the area.
__________________
Ray Tonks
2020 Donation Paid
Titan IOX-370, Dual PMAGs, 9.6:1 Pistons, FM-150
RV-7 Fuselage in progress
* Cabin Interior - In progress
RV-7 SB Wings
* Both Wings fully skinned
* Fuel Tanks Complete - No leaks finally
* Ailerons Complete
* Flaps Complete
RV-7 Empennage - Complete (a little fiberglass work left)
Vans Training Kit # 2 - Complete
RV-7 Preview Plans
Vans Training Kit #1 - Complete
EAA Sheet Metal Class - Complete
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04-21-2017, 07:42 AM
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Join Date: Jan 2005
Location: Tampa, FL
Posts: 2,861
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+1
Quote:
Originally Posted by rapid_ascent
It's much simpler to just mask and prime the area.
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This. I primed those CSKs and would do it that way again if I had to.
__________________
Todd "I drink and know things" Stovall
PP ASEL-IA
RV-10 N728TT - Flying!
WAR EAGLE!
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04-21-2017, 08:08 AM
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Join Date: Oct 2014
Location: Sarasota Fl
Posts: 168
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Alodine pen and epoxy primer with a Q tip for me but I live on the coast of Florida so corrosion scares the **** out of me.
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04-21-2017, 08:10 AM
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Join Date: Oct 2005
Location: Estes Park, CO
Posts: 3,931
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Countersinks
Which do you have? Alodine pen, use it. Primer? Spray some in a paper cup and apply with a Q-tip.
__________________
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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04-21-2017, 02:05 PM
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Join Date: Jun 2016
Location: Livermore, CA
Posts: 397
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Thanks for the advice, all. I did the "cup of primer + q-tip" method and will probably just leave it be.
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