What kind of liquid can be seen 'leaking' from the upper surface of the wing of a Boeing 737-800?Why does the...
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What kind of liquid can be seen 'leaking' from the upper surface of the wing of a Boeing 737-800?
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Can anyone advise what the liquid seen on the wing of a 737-800 on approach as highlighted on the attached images is? The liquid was seen "pulsating" from the bases marked by the arrows. As the plane came to land, the intensity of the flow decreased until it eventually stopped altogether.
boeing-737
asked yesterday
VH-NZZVH-NZZ
1751 silver badge7 bronze badges
$endgroup$
|
show 1 more comment
$begingroup$
Can anyone advise what the liquid seen on the wing of a 737-800 on approach as highlighted on the attached images is? The liquid was seen "pulsating" from the bases marked by the arrows. As the plane came to land, the intensity of the flow decreased until it eventually stopped altogether.
boeing-737
asked yesterday
VH-NZZVH-NZZ
1751 silver badge7 bronze badges
$endgroup$
3
$begingroup$
Lubricant, rain, melting ice.... Any liquid will vibrate when blasted with high winds.
$endgroup$
– Carey Gregory
yesterday
$begingroup$
Not exactly sure what you mean by Any liquid will vibrate when blasted with high winds. That liquid was throbbing from the edges that I marked so whatever this was, it came from within the wing so it's unlikely to be either ice. The conditions were dry and hot, so not conducing to ice formation.
$endgroup$
– VH-NZZ
yesterday
1
$begingroup$
You said it was pulsating. I meant the same by saying "vibrate." I simply meant that any liquid is going to pulsate/throb/vibrate in a strong wind. My guess would be it's lubricant but who knows? Small amounts of water can get inside a wing easily.
$endgroup$
– Carey Gregory
23 hours ago
$begingroup$
And leak out of the edges? The aircraft was in steady descent at a seemingly constant rate, and in smooth air.
$endgroup$
– VH-NZZ
23 hours ago
2
$begingroup$
@VH-NZZ the conditions were not dry and hot when the plane was at altitude. Even in hot weather, air at cruising altitudes is extremely cold.
$endgroup$
– barbecue
9 hours ago
|
show 1 more comment
$begingroup$
Can anyone advise what the liquid seen on the wing of a 737-800 on approach as highlighted on the attached images is? The liquid was seen "pulsating" from the bases marked by the arrows. As the plane came to land, the intensity of the flow decreased until it eventually stopped altogether.
boeing-737
asked yesterday
VH-NZZVH-NZZ
1751 silver badge7 bronze badges
$endgroup$
Can anyone advise what the liquid seen on the wing of a 737-800 on approach as highlighted on the attached images is? The liquid was seen "pulsating" from the bases marked by the arrows. As the plane came to land, the intensity of the flow decreased until it eventually stopped altogether.
boeing-737
boeing-737
asked yesterday
VH-NZZVH-NZZ
1751 silver badge7 bronze badges
asked yesterday
VH-NZZVH-NZZ
1751 silver badge7 bronze badges
asked yesterday
VH-NZZVH-NZZ
1751 silver badge7 bronze badges
asked yesterday
VH-NZZVH-NZZ
1751 silver badge7 bronze badges
asked yesterday
VH-NZZVH-NZZ
1751 silver badge7 bronze badges
1751 silver badge7 bronze badges
3
$begingroup$
Lubricant, rain, melting ice.... Any liquid will vibrate when blasted with high winds.
$endgroup$
– Carey Gregory
yesterday
$begingroup$
Not exactly sure what you mean by Any liquid will vibrate when blasted with high winds. That liquid was throbbing from the edges that I marked so whatever this was, it came from within the wing so it's unlikely to be either ice. The conditions were dry and hot, so not conducing to ice formation.
$endgroup$
– VH-NZZ
yesterday
1
$begingroup$
You said it was pulsating. I meant the same by saying "vibrate." I simply meant that any liquid is going to pulsate/throb/vibrate in a strong wind. My guess would be it's lubricant but who knows? Small amounts of water can get inside a wing easily.
$endgroup$
– Carey Gregory
23 hours ago
$begingroup$
And leak out of the edges? The aircraft was in steady descent at a seemingly constant rate, and in smooth air.
$endgroup$
– VH-NZZ
23 hours ago
2
$begingroup$
@VH-NZZ the conditions were not dry and hot when the plane was at altitude. Even in hot weather, air at cruising altitudes is extremely cold.
$endgroup$
– barbecue
9 hours ago
|
show 1 more comment
3
$begingroup$
Lubricant, rain, melting ice.... Any liquid will vibrate when blasted with high winds.
$endgroup$
– Carey Gregory
yesterday
$begingroup$
Not exactly sure what you mean by Any liquid will vibrate when blasted with high winds. That liquid was throbbing from the edges that I marked so whatever this was, it came from within the wing so it's unlikely to be either ice. The conditions were dry and hot, so not conducing to ice formation.
$endgroup$
– VH-NZZ
yesterday
1
$begingroup$
You said it was pulsating. I meant the same by saying "vibrate." I simply meant that any liquid is going to pulsate/throb/vibrate in a strong wind. My guess would be it's lubricant but who knows? Small amounts of water can get inside a wing easily.
$endgroup$
– Carey Gregory
23 hours ago
$begingroup$
And leak out of the edges? The aircraft was in steady descent at a seemingly constant rate, and in smooth air.
$endgroup$
– VH-NZZ
23 hours ago
2
$begingroup$
@VH-NZZ the conditions were not dry and hot when the plane was at altitude. Even in hot weather, air at cruising altitudes is extremely cold.
$endgroup$
– barbecue
9 hours ago
3
3
$begingroup$
Lubricant, rain, melting ice.... Any liquid will vibrate when blasted with high winds.
$endgroup$
– Carey Gregory
yesterday
$begingroup$
Lubricant, rain, melting ice.... Any liquid will vibrate when blasted with high winds.
$endgroup$
– Carey Gregory
yesterday
$begingroup$
Not exactly sure what you mean by Any liquid will vibrate when blasted with high winds. That liquid was throbbing from the edges that I marked so whatever this was, it came from within the wing so it's unlikely to be either ice. The conditions were dry and hot, so not conducing to ice formation.
$endgroup$
– VH-NZZ
yesterday
$begingroup$
Not exactly sure what you mean by Any liquid will vibrate when blasted with high winds. That liquid was throbbing from the edges that I marked so whatever this was, it came from within the wing so it's unlikely to be either ice. The conditions were dry and hot, so not conducing to ice formation.
$endgroup$
– VH-NZZ
yesterday
1
1
$begingroup$
You said it was pulsating. I meant the same by saying "vibrate." I simply meant that any liquid is going to pulsate/throb/vibrate in a strong wind. My guess would be it's lubricant but who knows? Small amounts of water can get inside a wing easily.
$endgroup$
– Carey Gregory
23 hours ago
$begingroup$
You said it was pulsating. I meant the same by saying "vibrate." I simply meant that any liquid is going to pulsate/throb/vibrate in a strong wind. My guess would be it's lubricant but who knows? Small amounts of water can get inside a wing easily.
$endgroup$
– Carey Gregory
23 hours ago
$begingroup$
And leak out of the edges? The aircraft was in steady descent at a seemingly constant rate, and in smooth air.
$endgroup$
– VH-NZZ
23 hours ago
$begingroup$
And leak out of the edges? The aircraft was in steady descent at a seemingly constant rate, and in smooth air.
$endgroup$
– VH-NZZ
23 hours ago
2
2
$begingroup$
@VH-NZZ the conditions were not dry and hot when the plane was at altitude. Even in hot weather, air at cruising altitudes is extremely cold.
$endgroup$
– barbecue
9 hours ago
$begingroup$
@VH-NZZ the conditions were not dry and hot when the plane was at altitude. Even in hot weather, air at cruising altitudes is extremely cold.
$endgroup$
– barbecue
9 hours ago
|
show 1 more comment
1 Answer
1
active
oldest
votes
$begingroup$
The pictures show water condensation on the wing upper surface due to very cold fuel in main tank number 2.
The fuel is cold because the air temperature at cruise altitude is significantly colder than the air temperature encountered during the descent.
The condensation appears to be oozing from the wing but it is in fact flowing slowly over the surface, filling and overflowing every seam and imperfection.
Since you have provided photos and not a movie, I can't tell you what the "pulsating" really was, but it probably was either a slight boundary layer turbulence, or changes in the seam geometry due to wing flexing.
answered 22 hours ago
A. I. BreveleriA. I. Breveleri
2,74115 silver badges17 bronze badges
$endgroup$
$begingroup$
I can be satisfied that the area above my yellow arrows is indeed condensation resulting from the cold fuel but what leaked in pulses was definitely not water or there would have been litres of it. It is unfortunate indeed that I did not take record a small movie.
$endgroup$
– VH-NZZ
41 mins ago
add a comment |
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$begingroup$
The pictures show water condensation on the wing upper surface due to very cold fuel in main tank number 2.
The fuel is cold because the air temperature at cruise altitude is significantly colder than the air temperature encountered during the descent.
The condensation appears to be oozing from the wing but it is in fact flowing slowly over the surface, filling and overflowing every seam and imperfection.
Since you have provided photos and not a movie, I can't tell you what the "pulsating" really was, but it probably was either a slight boundary layer turbulence, or changes in the seam geometry due to wing flexing.
answered 22 hours ago
A. I. BreveleriA. I. Breveleri
2,74115 silver badges17 bronze badges
$endgroup$
$begingroup$
I can be satisfied that the area above my yellow arrows is indeed condensation resulting from the cold fuel but what leaked in pulses was definitely not water or there would have been litres of it. It is unfortunate indeed that I did not take record a small movie.
$endgroup$
– VH-NZZ
41 mins ago
add a comment |
$begingroup$
The pictures show water condensation on the wing upper surface due to very cold fuel in main tank number 2.
The fuel is cold because the air temperature at cruise altitude is significantly colder than the air temperature encountered during the descent.
The condensation appears to be oozing from the wing but it is in fact flowing slowly over the surface, filling and overflowing every seam and imperfection.
Since you have provided photos and not a movie, I can't tell you what the "pulsating" really was, but it probably was either a slight boundary layer turbulence, or changes in the seam geometry due to wing flexing.
answered 22 hours ago
A. I. BreveleriA. I. Breveleri
2,74115 silver badges17 bronze badges
$endgroup$
$begingroup$
I can be satisfied that the area above my yellow arrows is indeed condensation resulting from the cold fuel but what leaked in pulses was definitely not water or there would have been litres of it. It is unfortunate indeed that I did not take record a small movie.
$endgroup$
– VH-NZZ
41 mins ago
add a comment |
$begingroup$
The pictures show water condensation on the wing upper surface due to very cold fuel in main tank number 2.
The fuel is cold because the air temperature at cruise altitude is significantly colder than the air temperature encountered during the descent.
The condensation appears to be oozing from the wing but it is in fact flowing slowly over the surface, filling and overflowing every seam and imperfection.
Since you have provided photos and not a movie, I can't tell you what the "pulsating" really was, but it probably was either a slight boundary layer turbulence, or changes in the seam geometry due to wing flexing.
answered 22 hours ago
A. I. BreveleriA. I. Breveleri
2,74115 silver badges17 bronze badges
$endgroup$
The pictures show water condensation on the wing upper surface due to very cold fuel in main tank number 2.
The fuel is cold because the air temperature at cruise altitude is significantly colder than the air temperature encountered during the descent.
The condensation appears to be oozing from the wing but it is in fact flowing slowly over the surface, filling and overflowing every seam and imperfection.
Since you have provided photos and not a movie, I can't tell you what the "pulsating" really was, but it probably was either a slight boundary layer turbulence, or changes in the seam geometry due to wing flexing.
answered 22 hours ago
A. I. BreveleriA. I. Breveleri
2,74115 silver badges17 bronze badges
answered 22 hours ago
A. I. BreveleriA. I. Breveleri
2,74115 silver badges17 bronze badges
answered 22 hours ago
A. I. BreveleriA. I. Breveleri
2,74115 silver badges17 bronze badges
answered 22 hours ago
A. I. BreveleriA. I. Breveleri
2,74115 silver badges17 bronze badges
2,74115 silver badges17 bronze badges
$begingroup$
I can be satisfied that the area above my yellow arrows is indeed condensation resulting from the cold fuel but what leaked in pulses was definitely not water or there would have been litres of it. It is unfortunate indeed that I did not take record a small movie.
$endgroup$
– VH-NZZ
41 mins ago
add a comment |
$begingroup$
I can be satisfied that the area above my yellow arrows is indeed condensation resulting from the cold fuel but what leaked in pulses was definitely not water or there would have been litres of it. It is unfortunate indeed that I did not take record a small movie.
$endgroup$
– VH-NZZ
41 mins ago
$begingroup$
I can be satisfied that the area above my yellow arrows is indeed condensation resulting from the cold fuel but what leaked in pulses was definitely not water or there would have been litres of it. It is unfortunate indeed that I did not take record a small movie.
$endgroup$
– VH-NZZ
41 mins ago
$begingroup$
I can be satisfied that the area above my yellow arrows is indeed condensation resulting from the cold fuel but what leaked in pulses was definitely not water or there would have been litres of it. It is unfortunate indeed that I did not take record a small movie.
$endgroup$
– VH-NZZ
41 mins ago
add a comment |
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3
$begingroup$
Lubricant, rain, melting ice.... Any liquid will vibrate when blasted with high winds.
$endgroup$
– Carey Gregory
yesterday
$begingroup$
Not exactly sure what you mean by Any liquid will vibrate when blasted with high winds. That liquid was throbbing from the edges that I marked so whatever this was, it came from within the wing so it's unlikely to be either ice. The conditions were dry and hot, so not conducing to ice formation.
$endgroup$
– VH-NZZ
yesterday
1
$begingroup$
You said it was pulsating. I meant the same by saying "vibrate." I simply meant that any liquid is going to pulsate/throb/vibrate in a strong wind. My guess would be it's lubricant but who knows? Small amounts of water can get inside a wing easily.
$endgroup$
– Carey Gregory
23 hours ago
$begingroup$
And leak out of the edges? The aircraft was in steady descent at a seemingly constant rate, and in smooth air.
$endgroup$
– VH-NZZ
23 hours ago
2
$begingroup$
@VH-NZZ the conditions were not dry and hot when the plane was at altitude. Even in hot weather, air at cruising altitudes is extremely cold.
$endgroup$
– barbecue
9 hours ago