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Questions tagged [flaps]

Surfaces that extend from the wings to increase lift, allowing flight at slower speeds (such as for takeoff and landing).

5 votes
3 answers
1k views

What drives the mechanical challenges which make trailing-edge flaps an (almost) ubiquitous solution vs leading-edge flaps?

(Apologies for the mouthful of a title.) I was thinking about canard aircraft and how trailing edge flaps (TEF) are actually counterproductive for them. Leading edge flaps (LEF) could theoretically ...
12 votes
3 answers
8k views

Why do similar Airbus and Boeing aircraft use different flap and slat mechanisms?

Why do most Boeing aircraft and their corresponding Airbus counterparts have different flaps and slats mechanisms (747 and A380, 737 and A320)? I'm assuming a lot of these mechanisms are patented. For ...
5 votes
6 answers
533 views

Is it pragmatic to use slats and flaps to maintain position of center of lift?

I am coming to this with an amateur understanding of CL, Cp and their contribution to the overall lift of a wing, so bear with me :) I have been wondering for some time about whether you could design ...
6 votes
1 answer
185 views

Split flap variant

Reading about this Q&As, how would a split flap behave if it acted like a solid, with no real split, but a thick trailing edge? Mostly wondering what happens between a) and c) and influence of ...
10 votes
3 answers
2k views

Split Flaps and lift?

Do split flaps produce lift? I don't see how, because there is no change in camber. It seems like an upside down speed break, producing only drag
6 votes
5 answers
2k views

Does more lift cause a plane to stall at a lower airspeed?

Does more lift cause a wing to stall later? (By more lift I mean a bigger wing) I was looking and saw this question, but the answers didn’t really address why more lift will help a plane not stall. ...
3 votes
2 answers
1k views

How beneficial are flaps when landing with a tailwind?

I understand that flaps are devices used to increase the amount of lift and drag. When landing with a tailwind your groundspeed will be higher. Therefore, flaps would help reduce this groundspeed, ...
13 votes
4 answers
3k views

How does the A350 variable camber system decrease drag?

Just curious how the A350 reduces drag/fuel burn by extending the flaps ever so slightly during cruise. Everything I've read about extending flaps says that extending them pushes the centre of ...
-1 votes
1 answer
124 views

Thoughts on Idea - AP Disengage, Land Flap Selection

When AP disengages the aircraft goes into a slight roll or the possibility exists for the aircraft to go into a degree of roll. Do you think it would be prudent for airlines to include as an SOP for ...
1 vote
3 answers
6k views

A320 flap settings

Can anyone please explain about the 5 types of A320 flap settings - Up, Flap 1, Flap 2 and FULL. What do these mean? I've read that the A320 gives 2 outputs for the corresponding flap settings. What ...
8 votes
1 answer
2k views

Visually see flap settings from passenger window behind wing

I've flown on a lot of Airbus and seen a lot of trip reports on YT and wonder if you can visually see the different flap settings (if you are seated at a window behind the wing), for example Up, Flap ...
9 votes
2 answers
2k views

Why such a small Krueger flap on 777-300?

Why is there such a small Krueger flap just inboard of the engine pylon on the Boeing 777-300, when the rest of the wing (including the further-inboard section of the wing) has leading edge slats? I ...
8 votes
4 answers
2k views

Which photo more accurately represents Flaps 1 in a 737-800?

A recent update in a sim craft changed the visuals from what I'm used to, but from my research it looks to be more realistic. This picture depicting it being more extended: or this picture depicting ...
0 votes
1 answer
107 views

what is the cross section of an elevator and trailing edge flap?

Is the cross section of both a Trailing edge flap and elevator an aerofoil please or, like i've shwon in in image below? I tried to find a side view of an elevator and TE deflected to see this for ...
1 vote
0 answers
143 views

Is there a known problem with the Airbus A340, fuel, flaps/slats and temperature?

From the press I read that the German minister of foreign affairs stranded with an Airbus A340 in Abu Dhabi, because the flaps or slats would not correctly retract. To return to the airport they had ...

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