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Refer to figure.
How does the aircraft configuration influence take-off performance while all other parameters remaining constant?

  • A

    Aircraft B has a higher tyre pressure than aircraft A

  • B

    Aircraft A has a higher tyre pressure than aircraft B

  • C

    Aircraft B has a higher flap setting than aircraft A

  • D

    Aircraft A has a higher flap setting than aircraft B

Refer to figure.
The use of high life devices (such as flaps) will have an impact on the take-off, landing roll and climb performance.

For a given runway length and airplane weight, selecting a greater flap setting will increase the lift coefficient, which reduces the stalling speed. As a consequence, the take-off speeds are reduced (the same lift will be created at smaller air speed due to greater lift coefficient) and, finally, this will reduce the take-off run.

But, selecting a greater flap setting during take-off, climb performance is decreased, due to the higher drag generated by the extended flaps.

For landing, a higher flap setting decreases the landing distance (due to slower approach speed).

Therefore, Aircraft A has a higher flap setting than aircraft B, because it covers less ground distance during take-off.

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