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What is the definition of the Maximum Take-Off Mass of a helicopter?
  • A
    It is the maximum permissible mass of a loaded helicopter before leaving the parking stand.

  • B
    It is the maximum permissible total helicopter mass at the start of the take-off.
  • C
    It is a take-off limited mass which is variable according to the runway strength of the departure aerodrome.
  • D
    It is a performance-limited take-off mass which is affected by atmospheric pressure and temperature.

The Maximum Take-Off Mass (MTOM), often referred to as Maximum Take-Off Weight (MTOW), of an aircraft is a fixed value defined by the aircraft manufacturer.

It is the maximum permissible total mass at the start of the take-off for helicopters and at the start of the take-off run for aeroplanes, due to structural or other limits.

The MTOM is usually specified in units of kilograms or pounds and does not vary with environmental factors (such as changes in temperature, wind component, runway etc.).

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