17 votes

Why are the red/white control surfaces under the wing extended during a take off?

These are not control surfaces, but a special type of split flap. In a split flap, the rear part (20% to 30%) of the lower wing panels is hinged at the front and can be lowered, thus increasing wing ...
11 votes

Why are the red/white control surfaces under the wing extended during a take off?

At a first sight it looked like a split flap but as @yshavit found out, it is actually a zap flap. A zap flap is a particular kind of split flap that via a leverage moves not only downward but also ...
  • 957
2 votes

Why are the red/white control surfaces under the wing extended during a take off?

I think that is a flap used on takeoff and landing. They are normally deployed (partially) on takeoff and (full) on landing. Flaps help in increasing lift at slower speeds. They are called 'high lift ...

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