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psm(at)att.net
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 Posted: Fri Apr 25, 2008 7:50 am Post subject: Smoking Gun? |
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First let me thank Sabrina for getting me to look at the photo number 28. I downloaded the pictures to look at the bolt she questioned. (Sabrina: The bolt looks OK to me, but I'm no expert.)
When I looked at the picture something jumped out in my mind's eye. The piece of metal the questioned last bolt is attached to is the wing attach upright. It is ripped right down the middle. Since this is a big piece of aluminum bent into a 90 degree angle and it is attached to a skinny little piece of fuselage skin, it seems to me the skin should have ripped rather than the attach upright.
Is this the root cause of the wing separation? Am I correct that this picture shows the wing attach upright failed first and that caused the structure failure?
I'm not sure of all this, but it sure looks that way to me. I hope all you mechanical/aeronautical engineers will look at this and form your own opinion.
Paul
XL fuselage
[img]cid:7.1.0.9.0.20080424132411.066da228(at)att.net.0[/img]
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Jeyoung65(at)aol.com
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| Posted: Fri Apr 25, 2008 8:35 am Post subject: Smoking Gun? |
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The bolt at the end of the part is showing more than four threads and a real good chance that the nut is bottomed on the bolt.Not good but wouldn't jump to say it caused the problem
In a message dated 4/25/2008 11:51:59 A.M. Eastern Daylight Time, psm(at)att.net writes:
| Quote: | First let me thank Sabrina for getting me to look at the photo number 28. I downloaded the pictures to look at the bolt she questioned. (Sabrina: The bolt looks OK to me, but I'm no expert.)
When I looked at the picture something jumped out in my mind's eye. The piece of metal the questioned last bolt is attached to is the wing attach upright. It is ripped right down the middle. Since this is a big piece of aluminum bent into a 90 degree angle and it is attached to a skinny little piece of fuselage skin, it seems to me the skin should have ripped rather than the attach upright.
Is this the root cause of the wing separation? Am I correct that this picture shows the wing attach upright failed first and that caused the structure failure?
I'm not sure of all this, but it sure looks that way to me. I hope all you mechanical/aeronautical engineers will look at this and form your own opinion.
Paul
XL fuselage
|
Need a new ride? Check out the largest site for U.S. used car listings at AOL Autos.
[quote][b]
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Kevin Bonds
Joined: 09 Jan 2006
Posts: 171
Location: Nashville, Tn
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| Posted: Fri Apr 25, 2008 10:24 am Post subject: Smoking Gun? |
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The fact that the upright fractured the way it did, was very odd to me
as well. Staring at that picture, I didn't even notice the length of the
bolt until Sabrina pointed it out. I was busy trying to figure out how
that thick upright could have torn the way it did. After giving it some
thought, I don't suppose it is that odd though. Considering the number
of rivets and the surface area holding that upright to the skin. It is
conceivable that the upright would tear instead.
Kevin Bonds
| Quote: | In a message dated 4/25/2008 11:51:59 A.M. Eastern Daylight Time,
psm(at)att.net writes:
When I looked at the picture something jumped out in my mind's
eye. The piece of metal the questioned last bolt is attached to
is the wing attach upright. It is ripped right down the middle.
Since this is a big piece of aluminum bent into a 90 degree angle
and it is attached to a skinny little piece of fuselage skin, it
seems to me the skin should have ripped rather than the attach
upright.
Is this the root cause of the wing separation? Am I correct that
this picture shows the wing attach upright failed first and that
caused the structure failure?
I'm not sure of all this, but it sure looks that way to me. I
hope all you mechanical/aeronautical engineers will look at this
and form your own opinion.
Paul
XL fuselage
------------------------------------------------------------------------
Need a new ride? Check out the largest site for U.S. used car listings
at AOL Autos <http://autos.aol.com/used?NCID=aolcmp00300000002851>.
*
*
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_________________
KevinBonds
Nashville, TN
Plans-building Zenith CH601XL w/Corvair Power
http://home.comcast.net/~kevinbonds |
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