A350 ?

[rb1957]

has anyone seen this little panel, pops up between the inbd aileron and the outbd flap ??
pic taken pre-takeoff

"Hoffen wir mal, dass alles gut geht !"
General Paulus, Nov 1942, outside Stalingrad after the launch of Operation Uranus.

 

[verymadmac]

why would the A350 be different to any other commercial transport?

I don't know, maybe the current gen of active gust alleviation allows for reduced wing stiffness which results in a critical clearance case during flight with flaps extended & max aileron deflection.

 

[MintJulep]

Here's half an hour of looking straight out over the wing.

https://m.youtube.com/watch?v=JvTrVfSjGdE

Let's us know what you see.

 

[rb1957]

I'm thinking it's a different model A350 ... my pic doesn't show something (fuel dump ?) sticking out the T/E.

"Hoffen wir mal, dass alles gut geht !"
General Paulus, Nov 1942, outside Stalingrad after the launch of Operation Uranus.

 

[jaceb]

Yes it is part of FTE structure. Laminar composite panel with thickness similar to the frontal armor of MBT. Initially it was planned as a sandwich panel as other one components of FTE but gentlemen from Toulouse keep reducing it's size and finally we have realized that there is no room for honeycomb core - instead there is ~60!! plies solid laminate (called within team i've worked "plank"). Function of this part is sweet secret of aero team from Toulouse - probably first approved CFD model has this and later no one was interested in pushing reasonable revision through AI's bureaucracy... than it is as it is - never underestimate human laziness . This is not sole example within this airplane's design where common sense has been replaced by SQL servers - so far it is only program i've worked where as a basis for structural analysis has been generated c.a. 17mln load cases .

 

[Ng2020]

To clarify, jaceb can you confirm it does not move?

 

[rb1957]

ah, "the gentlemen from Toulouse" !!

and to clarify, can you confirm that it does move. My pic shows that it is clearly above the wing T/E.

"Hoffen wir mal, dass alles gut geht !"
General Paulus, Nov 1942, outside Stalingrad after the launch of Operation Uranus.

 

[jaceb]

is member of the wing's FTE subassembly - fixed trailing edge - is not movable part

 

[rb1957]

ok, how do you explain the pic ?

do the aileron's droop for take-off ?

"Hoffen wir mal, dass alles gut geht !"
General Paulus, Nov 1942, outside Stalingrad after the launch of Operation Uranus.

 

[3DDave]

Flaperons and I bet they do. The joy that is fly by wire.

 

[LittleInch]

rb1957,

It certainly looks like it. A number of sources say that the A350 inner aileron droops slightly when the flaps are extended.

e.g.

https://www.parlonsaviation.com/wp-content/uploads/2017/12/a350-flight-controls.pdf

page 11

There is something that where the flaps are max extended they don't droop, but otherwise the action seems to be that both flaps and ailerons move down but it would probably look like the little bit moves up as you don't expect the aileron to move down?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[jaceb]

rb1957,
yes - ailerons drop off for take off, and i think as well this is part of low speed control laws in general, but it is my guess only, i haven't been involved in control system design for this project