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nlewis(at)wildblue.net
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 Posted: Wed Feb 25, 2009 9:18 pm Post subject: primer! yeah, I know... |
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so we're trying to get a handle on the whole internal primer thing, and
we're having trouble finding the representative arguments.
it's easy to find someone who says "hey, you're what, 60? your plane will
last longer than you will no matter what you do - build on." we're a bit
younger than that, and I hope our kids will fly our RV after we're gone.
it's easy to find scores of people saying "I don't want to get into the
primer wars, but here's what I did." anecdotes are fun reading, but since
they span from "1952 beaver on floats in salt water, and I didn't die"
through "1985 C172 in the midwest and you wouldn't believe the mess I found
when I pulled the skins", the anecdotes don't really help all that much
either.
we even find stuff like the eaa1000 articles from the nineties, which seem
to say that if you're not going to set all your rivets wet, you're not
serious about corrosion control. (and, in passing, that alodining does as
much to prevent corrosion as any amount of other prep and prime can.) that
sort of sounds like the most credible argument, but I haven't seen a lot of
RV build logs talking about setting rivets wet. why not?
we also find people pointing out that common primers are porous, and hence
useless for corrosion control - primers are for paint adhesion, not
corrosion prevention. hmm.
so...I don't want to restart the primer wars either. but I'm wishing I
could find each of the canonical points of view, as well stated as they each
can be, so we could be informed and decide.
I feel like we came late to the party and missed the brawl, and now the
information is lost. It would be easy to pick somebody and follow their
lead, but something a little more rigorous seems in order...
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g4mech(at)sbcglobal.net
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| Posted: Wed Feb 25, 2009 9:49 pm Post subject: primer! yeah, I know... |
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Build and fly........or prime, clean up, prime again the fly....depends on
you, and only you. Prime is always a good idea but practical experience
shows that good old alclad works great. Some folks do go overboard but its
there plane and what ever makes them happy is what they should do. Where the
airplane lives is a consideration too. Here in Southern California it is
pretty dry and warm most of the year. Back when Comanche's were being built
they primered all of the structure, when the Lock Haven plant turned into a
submarine factory (flooded) they were transitioning to the PA28 line and for
economical reasons they no longer primed, (might have been an option
though). How many PA28 have been scrapped because of lack of primer?? I am
sure a few but not near the numbers to make a huge dent in the choice.
Bottom line, either way has its advantages!! You are going to get a ton of
answers on this one.
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