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A helicopter will achieve the maximum flight distance when flying at the speed…
  • A
    For minimum power required.
  • B
    Minimum hourly fuel flow.
  • C
    For maximum range.
  • D
    For maximum endurance.

A helicopter will achieve the maximum air distance when flying at the maximum range speed.

When flying for range, the helicopter is flown at the speed and height that will allow it to cover the maximum distance possible for a given amount of fuel. In the other words, the maximum range conditions for a helicopter will occur when both the ratio of TAS to Power required and Specific Fuel Consumption (SFC) are at a minimum.

The maximum range speed, VMR, is the minimum drag speed, VMD, and is achieved where the best Power/TAS ratio occurs (tangent on the power curve).

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