Confusing Picture

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speedbird1
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Confusing Picture

Post by speedbird1 »

Just seen this pic on planepictures.net and I'm wondering if the aircraft in the picture id dumping a little fuel before landing? The comment doesn't suggest it, but to me it just doesn't tell the full story!
Have a look and see what do you think?

http://www.planepictures.net/netshow.php?id=311605

Emirates

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Bottie
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Post by Bottie »

It looks like fuel-dumping, but as you can see, there's a lot of condensation above the wings also, and with the flaps enabled, you can have some more condensation when the air goes over the edges of the flaps (I think ;) )

Maaske
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Post by Maaske »

Great picture :D

Suppose it are some kind of trails , because dumping fuel doesn't seem logic to me :roll:

Greetz

Robin_Bamps

Post by Robin_Bamps »

I would be surprised that a plane would dump fuel at :

1) Such a low altitude (as the gears are already down)
2) Above crowded areas (as they comment says "Just passing over my house")

You can see some condensation on the wing surface, so I guess it are just condense trails...

Regards, Robin Bamps.

Maaske
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Post by Maaske »

Right robin , I have to agree with your 2 points

Quite a low altitude and populated area and indeed you can see the condensation on the wingsurfaces

bigjulie

Post by bigjulie »

When aircraft dump fuel, they do not do it at too low an altitude & certainly not over populated areas.

SN30952
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Post by SN30952 »

I suppose the picture was taken Saturday MAR05?
Afonso Pena Airport is located in Curitiba, Brazil, capital of the State of Paraná, 1.6 million people.
Landing on Runway 2: Heading 15/33, 2,215m (7,267ft), 42/F/A/X/T
This airport elevation is 911m
Then some explanation is here
Weather data for MAR05
Mean Temperature 65 °F / 18 °C
Max Temperature 75 °F / 23 °C
Min Temperature 55 °F / 12 °C
Dew Point 56 °F / 13 °C
Average Humidity 85
Maximum Humidity 100
Minimum Humidity 64

AEROPORTO INTERNACIONAL AFONSO PENA also click: Mais Fotos

Very good observations, Robin.
Note: Lots of people like to speak German there, I remember. I suspect the Germans even to get inspired by the opera there for the design of the parliament house in Berlin...
There I saw capivaras too.

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Advisor
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Post by Advisor »

What are contrails? This topic can be viewed at

https://www.aviation24.be/posts7748-start20.html

Chemtrails! This can be viewed at

https://www.aviation24.be/postt9132.html

Now we can have a discussion whether it is a contrail or a chemtrail. Though the possibility of a fuel dump also cannot be totally ruled out.
Aum Sweet Aum.

website-info
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Post by website-info »

It's not strictly true that dumping fuel from a low level does not happen. Last year whilst in Vancouver I watched an Air Canada A340 take off and as it rotated it blew an engine, very quickly you could also smell fuel, the aircraft declared an emergency and could be seen streaking through the Vancouver skies at 5000ft dumping as much fuel as possible and coming straight back on approach to the same runway and landing within 10mins, still dumping fuel. My photos of this actually appeared on the front cover of the Vancouver Sun newspaper. AND YEP IT STANK TO HELL FOR HOURS AFTER.

Rgds
Tony

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sn26567
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Post by sn26567 »

EPS_Aviation wrote:My photos of this actually appeared on the front cover of the Vancouver Sun newspaper.
Can you share them with us?
André
ex Sabena #26567

website-info
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Post by website-info »

Andre,

I need to find them first, I'll look again tonight,

Rgds
Tony

Allnipponairways
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Post by Allnipponairways »

very bizarre the condence ... maybe contact somebody from varig because that is a varig brazilian airlines ...

greets

BieleAlbatrosy
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Post by BieleAlbatrosy »

Fuel dump definitely.
On DC-10 that's the position of the fuel dump probes.
Indeed weird situation to dump fuel, but actually I find the contrails a little bit too big and dense for regular condensation contrails.
And in my opinion, if the aircraft would leave such big condensation stripes on the outboard flaps, there would also be something visible on the inboard flaps. Go have a look when a DC-10 or MD-11 comes in with moistureous weather and watch the outboard of the inboard flaps.
The fuel dump pipe is placed in such a position that fuel can be diffused as good as possible so that it vaporizes quickly, like near the outboard flap edge where a lot of vortices are created.

My 2 cents :wink:

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speedbird1
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Post by speedbird1 »

@BieleAlbatrosy
That's what I thought, that's why I started the topic, just not right! The trails seem too long.
Thanks for all the views guys!

Emirates

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Post by website-info »

I found my pics of the Air Canada A330 but don't know how to upload them, if someone wants to explain, i'll post them later

Tony

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luchtzak
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Post by luchtzak »

EPS_Aviation wrote:I found my pics of the Air Canada A330 but don't know how to upload them, if someone wants to explain, i'll post them later
Tony,

these links might help you already:

https://www.aviation24.be/postt4516.html
https://www.aviation24.be/postt494.html

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Bruspotter
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Post by Bruspotter »

Hello

Wow!!! That would have been some massive fuel dump! :lol:

But indeed it's just some d:censored: n nice vortex! 8O 8O Nice pic!

Best regards: Yannick ;)

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Avro
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Post by Avro »

To me it doesn't look like fuel dumping.... I will chack later to see where the Jettison lines are located on the DC-10.

BieleAlabtrosy,

Are there 2 jettison lines on the DC10 as well ?

Chris

Jense

Post by Jense »

Come on, be realistic... that a contrail? Don't think so.
Avro wrote:To me it doesn't look like fuel dumping....
To me it does tough
Avro wrote:I will chack later to see where the Jettison lines are located on the DC-10.
On the same place as most jetliners have:
http://www.airliners.net/open.file/322808/L

BieleAlbatrosy
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Post by BieleAlbatrosy »

Avro wrote:To me it doesn't look like fuel dumping.... I will chack later to see where the Jettison lines are located on the DC-10.

Are there 2 jettison lines on the DC10 as well ?

Chris
Already checked before I posted.

2 fuel jettison pipes right outboard of the outboard flaps.
Bruspotter wrote:Wow!!! That would have been some massive fuel dump!
Fuel dump is always massive :roll: That's the whole idea of fuel dumping, to loose the fuel as fast as possible.
Emirates wrote:The trails seem too long
How do you mean? Too long for fuel dump? Sorry if I misunderstand you.
Fuel dump trails are always more intense unless there's no more fuel left to dump. Thus longer and thicker than just floating water which is gathered by the wing. Certainly with such a relatively nice weather. Maybe when it would have been raining.
I've seen DC-10's coming in at Brussels (short final in my garden) with heavy rainfall 100's of times and never saw them with such big water trails.

Can't think of anything else but fuel dump. To me water trail is excluded because of too intense and no trail at the inboard flaps, where there also should have been some trail visible.

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