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Effect of flaps on take-off performance: Approved take-off flap settings: UP / 5° / 10° / 15° If a take-off is performed with flaps up instead of using 10° of flaps the:
  • A
    Lift off speed decreases.
  • B
    Climb performance decreases.
  • C
    Take-off distance decreases.
  • D
    Ground roll distance increases.
Flap Setting
Increasing flap angle increases CLMAX, which reduces stalling speed and take-off speed., this reduces the take-off distance. Increasing flap angle increases drag, reducing acceleration, and increasing the take-off distance. The net effect is that take-off distance will decrease with increase of flap angle but above a certain flap angle the take-off distance will increase again.

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