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Refer to figure.
What is the maximum pressure altitude to conduct a hover in ground effect if the helicopter mass equals 2400 lbs and the outside air temperature is +20°C?

  • A

    9000 ft

  • B

    11 000 ft

  • C

    9500 ft

  • D

    8600 ft

Refer to figure.
This graph is used to determine:

  • The maximum mass to Hover In Ground Effect (HIGE) at a given pressure altitude with a given temperature (if entered in the graph with pressure altitude).
  • The maximum pressure altitude to Hover In Ground Effect (HIGE) for a given mass at a given temperature (if entered in the graph with mass).

For this question, to determine the maximum pressure altitude to conduct a HIGE, proceed with the following manner:

  • Enter with mass 2400 lbs from the bottom of the graph.
  • Move vertically upwards until the +20°C temperature line.
  • Continue horizontally to the left to read Pressure Altitude 8600 ft.

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