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Performance Class A, Take-Off. Which of the following speeds shall not be exceeded by V1?
  • A
    VMBE
  • B
    VMU
  • C
    VMCG
  • D
    VEF

Maximum Brake Energy Speed - VMBE

The maximum speed on the ground from which an airplane can safely stop within the energy capabilities of the brakes. V1 must not be greater than VMBE. At V1 the airplane must be able to stop or continue the take-off, but above VMBE it is impossible to bring the airplane safely to a stop.

With an uphill slope it will be easier for the aircraft to stop, increasing the VMBE. Increasing the VMBE limit, a higher V1 allowed permits a higher maximum take-off mass.

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