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18 votes

Visually see flap settings from passenger window behind wing

Yes, you can definitely tell how much the flaps are deployed just by looking at the numbers on the flap itself, close to the root of the wing, which gives the angle in degrees (original picture): I'...
sophit's user avatar
  • 13.8k
13 votes

Split Flaps and lift?

Yes, deploying split flaps increases lift, because they do increase camber. It's as if the airfoil became solid between its (now two) trailing edges. Between those two trailing edges there's a lot ...
Camille Goudeseune's user avatar
8 votes

Split Flaps and lift?

A split flap is a very good choice for the landing configuration. Simple and effective. For the approach you want that extra drag. It helps to slow down and allows to keep the engine running at a ...
Peter Kämpf's user avatar
8 votes

Split Flaps and lift?

Do split flaps produce lift? I don't see how Well, after all lift is created by deflecting air downward, which is exactly what a split flap does - although in a very inefficient way i.e. with a lot ...
sophit's user avatar
  • 13.8k
7 votes

Why such a small Krueger flap on 777-300?

Due to wing sweep the engine nacelle blocks airflow that would feed a slot in that location, so the Kreuger flap is used instead. Outboard the pylon there is no such problem. ref
Pilothead's user avatar
  • 20.7k
7 votes

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

I was looking and saw this question, but the answers didn’t really address why more lift will help a plane not stall. I agree that there's a bit of confusion in the answers to that question that you ...
sophit's user avatar
  • 13.8k
4 votes

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

A given level of wing technology (think airfoil choice and all high lift devices) applied to a planform family (same general shape wing, i.e. similar sweep angles and taper ratios and twist approach) ...
Rob McDonald's user avatar
  • 13.5k
3 votes

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

Stall speed If we decrease airspeed and want to stay level, we need to increase the AoA (actually the lift coefficient $\small C_L$ in the equation below). As we continue to decrease airspeed, and to ...
mins's user avatar
  • 75k
3 votes

Thoughts on Idea - AP Disengage, Land Flap Selection

Until 2013 several airlines promoted the idea of using as much automation as possible during all phases of flight to improve safety. The idea was that autopilots are less likely to make handling ...
Bianfable's user avatar
  • 56.6k
3 votes
Accepted

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

Many elevators have airfoil shapes. The precise way you've drawn the flap is not physically possible. It is drawn as a shear of the trailing edge. That would involve deforming materials. Instead, a ...
Rob McDonald's user avatar
  • 13.5k
2 votes
Accepted

Split flap variant

All of your flaps, starting with position b, will add lift, the more the further back they are positioned. Again, I will use Sighard Hoerners book Fluid Dynamic Lift to support my point. In Figure 9 ...
Peter Kämpf's user avatar
2 votes

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

From a 737-800 today: During takeoff, Flaps 5: After initial flap retraction, to Flaps 1: Conclusion: The first image in the question is a reasonable Flaps 1 depiction (more so than Flaps 5), and ...
Ralph J's user avatar
  • 51.8k
1 vote

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) (All of this at the same speed) No, stall is related to flow breakdown at specific AOA in a specific configuration (i.e....
Mohsin's user avatar
  • 9
1 vote

How does the A350 variable camber system decrease drag?

To answer your specific question: The specific ability of the A350 is to extend the inboard flaps independently of the outboard flaps and to extend them by only a few degrees. The A350 has a high wing ...
Kai Petzke's user avatar

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