Your opinion on this landing

Jose wrote:
each section
of the wing is only as strong as it needs to be. Therefore, the chance
of failure (at least ideally) is about equal anywhere along the wing

In fact, there's a video somewhere showing a stress test on a wing; the
entire wing fails pretty much at the same time.

Jose

I'd like to see that video as the odds of this happening are nearly zero.

Matt

On May 12, 11:41 am, Matt Whiting wrote:
Jose wrote:
each section
of the wing is only as strong as it needs to be. Therefore, the chance
of failure (at least ideally) is about equal anywhere along the wing

In fact, there's a video somewhere showing a stress test on a wing; the
entire wing fails pretty much at the same time.

Jose

I'd like to see that video as the odds of this happening are nearly zero.

Matt

Certainly one section would expect to fail first, either by chance or
because one section ends up being weaker for practical reasons. I've
seen the video, when the main spar fails the wing shatters, its a bit
difficult to tell where it failed because of the shattering.

-Robert

Robert M. Gary wrote:
On May 12, 11:41 am, Matt Whiting wrote:
Jose wrote:
each section
of the wing is only as strong as it needs to be. Therefore, the chance
of failure (at least ideally) is about equal anywhere along the wing
In fact, there's a video somewhere showing a stress test on a wing; the
entire wing fails pretty much at the same time.
Jose
I'd like to see that video as the odds of this happening are nearly zero.

Matt

Certainly one section would expect to fail first, either by chance or
because one section ends up being weaker for practical reasons. I've
seen the video, when the main spar fails the wing shatters, its a bit
difficult to tell where it failed because of the shattering.

I've not seen a composite wing fail so maybe they look different than
the metal ones I've seen. The latter always snaps at one point,
typically close to the root. I saw footage some years ago of an
airplane (I want to say an Aero Commander, but I'm not sure anymore)
that pulled up too steeply and shed both wings. They folded up right
near the fuselage on both sides.

I've seen a few videos of airliner wings stressed to failure and when
they fail it looks like a small explosion with debris flying everywhere,
but much of that is the test apparatus flying around. The failure
occurred at a point. It simply isn't possible to design a wing
perfectly enough or, harder yet, assemble it uniformly enough to get a
distributed failure.

Matt

The failure occurred at a point. It simply isn't possible to design a wing perfectly enough or

Well, yes, but at the time of failure, the rest of the wing (in the test
I saw) was stresesed very close to =its= breaking point, so once it let
go wherever it did, the other points also let go.

Jose
--
Quantum Mechanics is like this: God =does= play dice with the universe,
except there's no God, and there's no dice. And maybe there's no universe.
for Email, make the obvious change in the address.

Jose wrote:
The failure occurred at a point. It simply isn't possible to design a
wing perfectly enough or

Well, yes, but at the time of failure, the rest of the wing (in the test
I saw) was stresesed very close to =its= breaking point, so once it let
go wherever it did, the other points also let go.

Not likely with an aluminum structure. The failure will quickly lessen
the stress on the remaining structure and it will not self-destruct.
I'm still waiting to see the video of this self-destructing wing. I'm
betting it is urban legend, but if there's proof I'd love to see it.

Matt

"Matt Whiting" wrote

Not likely with an aluminum structure. The failure will quickly lessen
the stress on the remaining structure and it will not self-destruct. I'm
still waiting to see the video of this self-destructing wing. I'm betting
it is urban legend, but if there's proof I'd love to see it.

I remember seeing a show on the making of the 777, and it was in a giant
wing testing rig, and it failed as was predicted at some certain spar
number, but a bunch of the rest blew apart too, since when the one place
failed. all of the stress was transferred to many other locations.

That type of failure is the only way I can see it all failing at the same
time, too.

The odds of the whole wing failing at once is......Astronomical!
--
Jim in NC

Morgans wrote:
"Matt Whiting" wrote

Not likely with an aluminum structure. The failure will quickly lessen
the stress on the remaining structure and it will not self-destruct. I'm
still waiting to see the video of this self-destructing wing. I'm betting
it is urban legend, but if there's proof I'd love to see it.

I remember seeing a show on the making of the 777, and it was in a giant
wing testing rig, and it failed as was predicted at some certain spar
number, but a bunch of the rest blew apart too, since when the one place
failed. all of the stress was transferred to many other locations.

That type of failure is the only way I can see it all failing at the same
time, too.

The odds of the whole wing failing at once is......Astronomical!

I agree and that was my point. Having a few sheets of the skin fly off
in close proximity to the spar failure point does not constitute
self-destruction of the week as was claimed earlier. I just watched the
777 video and it is quite clear from both the visual evidence and the
narrators comments that the wing failed at a specific location.

Matt

I'm still waiting to see the video of this self-destructing wing. I'm betting it is urban legend,

IT is not an urban legend. I have seen it.

Well, it's not an urban legend unless I'm also an urban legend.

Jose
--
Quantum Mechanics is like this: God =does= play dice with the universe,
except there's no God, and there's no dice. And maybe there's no universe.
for Email, make the obvious change in the address.

Jose wrote:
I'm still waiting to see the video of this self-destructing wing.
I'm betting it is urban legend,

IT is not an urban legend. I have seen it.

Well, it's not an urban legend unless I'm also an urban legend.

You saw something than the video link posted here earlier?

Matt

They pull those wings up at the tips, no?

mike

"Matt Whiting" wrote in message
...

I've seen a few videos of airliner wings stressed to failure and when they
fail it looks like a small explosion with debris flying everywhere, but
much of that is the test apparatus flying around. The failure occurred at
a point. It simply isn't possible to design a wing perfectly enough or,
harder yet, assemble it uniformly enough to get a distributed failure.

Matt