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a380 qantas, photos of damaged engine

  • Thread starter Thread starter cacciatorino
  • Start date Start date
practically everything would result from the fatigued yield of a fitting, due to a seat (counterbore=lamatura) performed outside center, and also a nice little, seeing the photo. :eek:

but caxx...!!! and with what do the lamatures, 'people? :confused:
with black&decker???? :mad:
 
marcof said:
when I see these reports on disaster escapes are always fought between thinking that these aircraft are built and designed by god or that passengers and crew had a big ass: eek:
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and when I hear or see these things I always think of what my cousin told me (good soul) that for 20 years he had been technical manager of alitalia to malpensa:
"Remember that planes never fall alone, but they pull them down. and pull them down are those who handle them by air or those who handle them on the ground"
It will also be an ovvity, to Catalan, but it always resets us.
 
Meccbell said:
practically everything would result from the fatigued yield of a fitting, due to a seat (counterbore=lamatura) performed outside center, and also a nice little, seeing the photo. :eek:
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I didn't realize much, even because I have to send out some drawings, and I get it back for good in the afternoon. But even those who put the arrows to indicate the area of the "fatigue c r a c k ing" took a nice crab! :rolleyes:

Maybe the president will explain to us what happened. . .
 
arrows aside, the concept is that everything was designed to have a perfect alignment of the hydraulic circuit tubes, if not, being one of the seats on a disallined connection, a side force component occurred to the assembly, which anomalously loaded the tube, determining its fatigue failure.

given this would seem even more disturbing, as if a misalignment seen, but presumably not exaggerated compared to the longitudinal development of the tube, it could determine such damage, then it means that the sizing of the part could also have been done a little, as to say, "tired".
there is also to say that in the hydraulic circuits often develop harmonic components and pulsation equally often difficult to quantify in the project, which can lead to these yields due to early fatigue of the components.
but it is precisely for what in oleodynamics (also in that "terrestrial") is trying to perform at best every part that involves a coupling, both static and dynamic, with other components of the circuit.
 
I'm still trying to figure it out, but it seems to me that the problem was very serious, more serious than the news reports.

It would seem that everything was generated by a loss of oil in the area between two stages of compression.
We're talking about 30 rr, so three tree.
a wall-mounted passage of a flexible would have yielded and the oil would have walked into the compressor.
According to me, for what it's worth, the oil arrived in the combustion chamber causing the explosion, the resulting overpressure destroyed the disc of the turbine, of which they found the "cocci".
combustion chambers have been disintegrated and in fact in the photos of the engine practically there are no more.
I attach a design of a self-constructed turbine by a genius crowd.
you can see, simplified, the problem of lubrication, if for any reason the oil should escape from the "flats" side of the turbine, you would have so much smoke and damage relative to the turbine itself, but if instead to "los" it was the compressor side, the oil would be sucked into the combustion chamber with nefarious effects.
Actually the lubricated area is at a lower pressure of the compressor, so the oil would not "do" go out, but if it is a power supply duct to lose, the oil pressure could well "power" the compressor.

this only to "start" the problem.

p.s.: and also to give some "suggestion" to those with the bearings of the turbines make us to "catches".
:smile:
 

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Meccbell said:
arrows aside, the concept is that everything was designed to have a perfect alignment of the hydraulic circuit tubes, if not, being one of the seats on a disallined connection, a side force component occurred to the assembly, which anomalously loaded the tube, determining its fatigue failure.
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eh, there was a reason if on the super-alce et similar guzzi the gasoline tube made an apparently useless helicopter at 8 laps on the way between the tank and the carburetor!
 
Er Presidente said:
you can see, simplified, the problem of lubrication, if for any reason the oil should escape from the "flats" side of the turbine, you would have so much smoke and damage relative to the turbine itself, but if instead to "los" it was the compressor side, the oil would be sucked into the combustion chamber with nefarious effects.
:
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you reminded me of the first diesel rhythm fiats: sometimes the diaphragm of the servofreno and the brake oil went to power the diesel engine, and there was no way to turn it off from the driver!
 
cacciatorino said:
eh, there was a reason if on the super-alce et similar guzzi the gasoline tube made an apparently useless helicopter at 8 laps on the way between the tank and the carburetor!
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That's right!
that is one of the most common and effective methods to absorb any disalignment and also abnormal vibrations.

However it has the defect that does not work very well in the presence of high pressures, as the pressure makes the tube much more rigid and therefore less "propens" to various springs and oscillations.
In addition, the helid should be done with non-consistent pitches and diameter, as it could become an element of dystubus in case of resonance.
 
Oil ingestion is one of the most classic causes of damage to all turbines, even those of cars.
think what happens if you draw the shaft lubrication oil of a turbine, compressor side, to the internal combustion engine, and what happens to the catalyst if you lose is the turbine side.
 
Meccbell said:
: eek: eek: : eek:
Crazy? ? ?
That's a genius!
Did you see how he works? And what pieces!
a door.
the nobel for mechanics should give him. :finger:
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When I started seeing the pictures, I thought of a joke.
It's true! He was just building it with his hands!
really incredible.
 

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