keta
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Asymmetric Flap Fairings On A380?

Mon Nov 21, 2005 6:24 pm

Hello,

While regarding this picture:


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Photo © Jan Kertzscher



I noticed that the inner right-wing flap track fairing is shorter than the one in the left wing. You can even see a grey-painted area, more or less what the left-wing fairing covers. In other pictures it is also seen:


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Photo © Kok Chwee SIM
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Photo © JKSC




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Photo © John Farrington - FlightLineImages
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Photo © Daniel Alaerts - AirTeamImages



Do you know why are the fairings asymmetric? I would expect both wings to be symmetrical? I haven't noticed that in other planes.
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Starlionblue
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RE: Asymmetric Flap Fairings On A380?

Mon Nov 21, 2005 7:23 pm

They look the same to me. The angles are tricky though so it's hard to be sure.
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
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HAWK21M
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RE: Asymmetric Flap Fairings On A380?

Mon Nov 21, 2005 8:29 pm


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Photo © Jan Kertzscher


Fantastic Observation!  bigthumbsup 
I think Keta is referring to the Wing mounted part of the Fairing & not the Movable Aft part of the Fairing.
The Inboard RH side Fixed portion of the Fairing is Shorter in length compared to the Inboard LH Side Fixed Portion of the Fairing.
Probably it covers some component.
I too would be Interested to Know the reason.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
keta
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RE: Asymmetric Flap Fairings On A380?

Mon Nov 21, 2005 10:13 pm

Quoting HAWK21M (Reply 2):
I think Keta is referring to the Wing mounted part of the Fairing & not the Movable Aft part of the Fairing.

Yes that's what I meant. I think it's quite visible. Sorry if I wasn't clear.  Smile
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Dakar
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RE: Asymmetric Flap Fairings On A380?

Mon Nov 21, 2005 11:40 pm

I see it now too. Weird. Hopefully there is an answer, it would be interesting to find out why.

Nick
 
Pihero
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RE: Asymmetric Flap Fairings On A380?

Tue Nov 22, 2005 12:34 am

An amazing piece of observation !
I see two reasons :
1/-the aerodynamic integration between the wing-engine pylon-flaps hasn't been frozen and AI is still comparing data from both sides, or
2/- the left fairing covers the EH actuator AI has been talking about for about four years. It could be the explanation as all three flying prototypes have it.

Regards
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oly720man
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RE: Asymmetric Flap Fairings On A380?

Tue Nov 22, 2005 1:26 am

Looking at the paint under the starboard wing in this picture


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Photo © Jan Kertzscher



it looks like the yellow/green primer isn't used over the area that would be covered by the bigger fairing.
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cymro
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RE: Asymmetric Flap Fairings On A380?

Tue Nov 22, 2005 5:45 am

Quoting Pihero (Reply 5):
1/-the aerodynamic integration between the wing-engine pylon-flaps hasn't been frozen and AI is still comparing data from both sides, or

The right hand is shorter by design and is the same on all aircraft produced so far.
 
Mir
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RE: Asymmetric Flap Fairings On A380?

Tue Nov 22, 2005 10:42 pm

It's a missile launcher.

signed,

LetsRoll911.org


But seriously,

Quoting Pihero (Reply 5):
2/- the left fairing covers the EH actuator AI has been talking about for about four years. It could be the explanation as all three flying prototypes have it

What's an EH actuator?

-Mir
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EI747SYDNEY
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RE: Asymmetric Flap Fairings On A380?

Tue Nov 22, 2005 11:28 pm

I tought my eyes were playing tricks with me for a while, then I seen it too.

Well spotted  bigthumbsup 

Rob  wave 
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Pihero
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RE: Asymmetric Flap Fairings On A380?

Tue Nov 22, 2005 11:34 pm

Better than my explanation,

3.1. What is an EHA?

A conventional actuator is connected to the central hydraulic system of the aircraft through pipes running from the aircraft’s hydraulic bay. It includes a servovalve which directs the hydraulic pressure (provided by the aircraft’s hydraulic pumps) to move the actuator shaft which is connected to the corresponding control surface (aileron, elevator, rudder, spoiler).

The EHA is connected to the aircraft’s electrical network (and not to the hydraulic system). It has a self contained electrical hydraulic pump, reservoir and accumulator which generate the hydraulic power required to move the same actuator shaft connected to the control surface. Therefore, the EHA is a real hydraulic actuator since the power to move the actuator shaft is hydraulic; however, since the hydraulic system is self-contained, it only requires electrical power from the aircraft’s network to operate.

EHA will allow to decentralize hydraulic system architectures. Kilometers of hydraulic pipes, pumps, reservoirs and accumulators which generate hydraulic power in a central location and then distribute this energy throughout the aircraft will be replaced by electrical wires and compact actuators which produce the energy required near the place where it is needed.
Contrail designer
 
keta
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RE: Asymmetric Flap Fairings On A380?

Wed Nov 23, 2005 1:54 am

Quoting Cymro (Reply 7):
The right hand is shorter by design and is the same on all aircraft produced so far.

So far - does that mean all production planes will be like this, or is it only for the first few frames? And by design - with what purpose? That's what we'd like to know.

Quoting Pihero (Reply 5):
2/- the left fairing covers the EH actuator AI has been talking about for about four years. It could be the explanation as all three flying prototypes have it.

Is the A380 going to use EHA for all actuators? Is it now only in one flap track?
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HAWK21M
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RE: Asymmetric Flap Fairings On A380?

Wed Nov 23, 2005 2:02 am

Quoting Pihero (Reply 5):
the left fairing covers the EH actuator AI has been talking about for about four years. It could be the explanation as all three flying prototypes have

Any Official data on the EH Actuator from Airbus.
regds
MEL
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Starlionblue
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RE: Asymmetric Flap Fairings On A380?

Wed Nov 23, 2005 1:14 pm

Quoting HAWK21M (Reply 2):
think Keta is referring to the Wing mounted part of the Fairing & not the Movable Aft part of the Fairing.

Ok I see it too now. The time we spend poring over minutiae...
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
knoxibus
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RE: Asymmetric Flap Fairings On A380?

Wed Nov 23, 2005 9:21 pm

Very good observation.

The Ram Air Turbine, according to my A380 General Familiarization training course documents, is located inside the left-hand side flap inner fairing.

That would explain the difference in size (proportional to the size of the A/C, I would say).

I actually looked in the structures chapter and normaly for symmetry purposes, the right side should have the same fairing.

I hope this answers the question, but I actually don't know if it corresponds to the exact reason why.

Reply #5 assumptions might still be part of it.
No matter what anybody tells you, words and ideas can change the world.
 
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HAWK21M
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RE: Asymmetric Flap Fairings On A380?

Thu Nov 24, 2005 12:29 pm

Quoting Knoxibus (Reply 14):
The Ram Air Turbine, according to my A380 General Familiarization training course documents, is located inside the left-hand side flap inner fairing.

Do you have access to the AMM on the A380.Maybe you could look it up or ask someone about it.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
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zeke
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RE: Asymmetric Flap Fairings On A380?

Thu Nov 24, 2005 9:24 pm

We are addicted to our thoughts. We cannot change anything if we cannot change our thinking – Santosh Kalwar
 
cymro
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RE: Asymmetric Flap Fairings On A380?

Fri Nov 25, 2005 7:28 pm

Quoting Keta (Reply 11):
Quoting Cymro (Reply 7):
The right hand is shorter by design and is the same on all aircraft produced so far.

So far - does that mean all production planes will be like this, or is it only for the first few frames? And by design - with what purpose? That's what we'd like to know.

All so far at least upto msn 018 and don't see any change soon.

I don't know 100% for what purpose I just know it is designed different.
 
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HAWK21M
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RE: Asymmetric Flap Fairings On A380?

Fri Nov 25, 2005 10:46 pm

Anyone working in Airbus Industries out here.Maybe we could get some data.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
keta
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RE: Asymmetric Flap Fairings On A380?

Sun Nov 27, 2005 3:16 am

Quoting Knoxibus (Reply 14):

Thanks Knoxibus, that's probably the answer! But still, why didn't they design the right-wing fairing the same as the left one? I mean, doesn't that make aerodynamic differences between both wings?

Quoting Zeke (Reply 16):
They look even in this shot http://www.jetphotos.net/viewphoto.p...32349

Hehe actually the left one looks bigger to me. Anyway, it's difficult to tell something from that pic, it's just too small.

Quoting Cymro (Reply 17):
All so far at least upto msn 018 and don't see any change soon.

Thanks for your info Cymro  Smile
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Matt72033
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RE: Asymmetric Flap Fairings On A380?

Sun Nov 27, 2005 4:11 am

Quoting Knoxibus (Reply 14):
The Ram Air Turbine, according to my A380 General Familiarization training course documents, is located inside the left-hand side flap inner fairing.

thats what i was going to suggest.....i remembered reading the 340 RAT was stowed in a flap track fairing and was wondeirng if they did the same on the 380!

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