Power margin indicator for a rotary wing aircraft, particularly a helicopter

摘要

A power margin indicator acquires rotary wing aircraft control parameters which are used to calculate and display a power margin. This calculation takes into account the actual rotor speed and a set point value for the rotor speed in order to determine, regardless of the flight configuration, a power margin which is such that when the rotor speed drops below this set point value, the display indicates that the collective pitch should be reduced until the rotor speed returns to the set point value.