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>larry, honestly, what you are writing is a load of missunderstood
>cobblers
<snip>
>my suggestion is that you go and read the sections in AC43-13 2b
Stealth Pilot,
While you are (or perhaps not) merely a pilot, I can understand you not
knowing anything about the process of building the plane you fly. As
an Engineer, I am here to help :-) And I designed quite a few of the
components in your Stealth... well, that is if you're an American in
Auz flying a B-2... elsewise, you're on yer own.
Further, as a jet jock (again, perhaps not) I can certainly believe
you've find yourself with some misunderstandings. That's normal,
really. Possibly, you've attributed more authorship to me than has
actually occured.
Regardless, 2024 isn't used simply for its "increased strength" for
there are MANY alloys equally strong and some decidedly stronger at a
much lower price. Perhaps you could tell us the REAL reason. Or
perhaps not. (hint: look up the word "fatigue"). Remarkably, you
missed even more points about 2024, namely its "very high resistance to
corrosion" in T-6 and T-8 tempers (MIL-HNDBK-5H). So even if you shout
while removing the cladding, after quench/aging, it makes no
difference. While you'd have no way of knowing that, and we that
actually build planes do, do not worry, I am still here to help. It
still has all the copper it ever had, but somehow *doesn't* corrode.
Why is that? Or are you at a loss?
As you knew that 2024 uses a largely copper alloy, that's a good start.
But ALL of the 2xxx series aluminums are mostly copper in alloy, yet
2024 has distictive properties that distinguish it for aircraft use --
and nearly no other 2xxx series is used. Why is that? Do you know?
It involves the silicon content. (ok, I sorta already gave this
away...)
Which is *also* why more and more 6xxx series (6065, 6061) aluminum is
being used. 2024 is out of sight pricewise these days, so why has it
been set aside for a different alloy? 6xxx has far *more* silicon, and
almost no copper, making it much harder to machine, yet far less 2024
is being used per plane than ever before. Curious, do not you think? Or
would you have anyway of knowing.
And, for your edification, *you* may or may not remove this cladding,
as I'd never impinge upon what you do with your own property, but
I, personally, have done exactly that in my younger years. Of course,
this was as an employee of Cessna Aircraft, working in an FAA Certified
manufacturing facility, working my way through Engineering school, so
it may not be totally congruent with the various stories told you in
your mil-spec pilot training -- doubtless from other mil-spec pilots
that never knew, either.
So believe as you will and I will not address the issue again. Rest
assured I will just nod and smile from half a globe away.
While I may, again, delve into the odd Advisory Circular, I spend most
of my time in FAR25 with occasion to FAR23 and various others. The
branch of the FAA that I deal with worries more about "the letter of
the FAR's" more than the "letter of the AC's".
Stay safe. Fly well. Stick to what you know.
Larry
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Re: Question about Alodine 1201
