Today's Message Index:
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1. 08:34 AM - Re: Corrosion protection (dalemed)
2. 02:20 PM - Re: Corrosion protection (Thruster87)
3. 03:11 PM - Re: Re: Corrosion protection (David Downey)
4. 10:21 PM - Re: Corrosion protection (Thruster87)
Message 1
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| Subject: | Re: Corrosion protection |
carlossa52(at)gmail.com wrote:
> ...
> Look at it this way: you will not regret having your plane primed, while not
having it primed may cause regret.
>
I'm not so sure of that. I've used primer on my tail surfaces - zinc oxide brushed
on some and a self etching spray on some others. I have some regrets because
I'm not sure I've done it properly. Have I properly prepared the surface?
Have I put on the proper thickness? These are nagging questions that I wouldn't
have if I hadn't primed.
I've heard that airplane manufacturers used to be (back in the 40s and 50s at least)
prohibited from priming surfaces before they were mated. Surfaces were
primed after assembly or not at all. These days, we seem to be encouraged to
prime before assembly.
I guess this is all part of the educational aspects of homebuilding!
Cheers,
--------
Dale
Flying Cessna 170B
Building Zenith 601XL
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=198570#198570
Message 2
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| Subject: | Re: Corrosion protection |
I've heard that airplane manufacturers used to be (back in the 40s and 50s at least)
prohibited from priming surfaces before they were mated. Surfaces were primed
after assembly or not at all. These days, we seem to be encouraged to prime
before assembly.
I 'm part of
an old farts club that restores vintage a/c like the C47 and most of the parts
were primed prior to assembly.In the next hangar they are restoring warbirds
like the P47 and they were primed.One interesting thing was the way they de-burred
the parts by just using a sanding disc as you can still see the scratches
[looks like 80-100 grit].Seems like they were in a hurry and it appears [they
havn't come across any]they didn't develop any stress fractures due to this
method of de-burring.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=198614#198614
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| Subject: | Re: Corrosion protection |
just remember that they did not understand fatigue well until after the war
in the beginning of the jet era. Also, the old transports and fighters wer
e "throwaway" hardware with very short specification lives. I don't think I
would allow a bad practice then to define/over ride todays understanding a
nd evidence.
David L. Downey Harleysville-(SE) PA, USA
--- On Thu, 8/14/08, Thruster87 <alania@optusnet.com.au> wrote:
From: Thruster87 <alania@optusnet.com.au>
Subject: Zenith601-List: Re: Corrosion protection
<alania@optusnet.com.au>
I've heard that airplane manufacturers used to be (back in the 40s and 50s
at least) prohibited from priming surfaces before they were mated. Surfaces
were
primed after assembly or not at all. These days, we seem to be encouraged t
o
prime before assembly.
I 'm part of
an old farts club that restores vintage a/c like the C47 and most of the pa
rts
were primed prior to assembly.In the next hangar they are restoring warbird
s
like the P47 and they were primed.One interesting thing was the way they
de-burred the parts by just using a sanding disc as you can still see the
scratches [looks like 80-100 grit].Seems like they were in a hurry and it
appears [they havn't come across any]they didn't develop any stress
fractures due to this method of de-burring.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=198614#198614
=0A=0A=0A
Message 4
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| Subject: | Re: Corrosion protection |
Early 50's models of the de Havilland Comet suffered from catastrophic metal fatigue,
causing a string of well-publicised accidents. As they found out how stress
risers are a lot more critical on pressurized aircraft but do not under
estimate there importance.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=198688#198688
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