Patent ID: 6195598
Filing Date: 2001-02-27
Classification: B64D,G01D

Abstract:
A power margin indicator for a rotary-wing aircraft, giving information on power margin available on at least one engine and one gearbox of the aircraft, as a function of the flight conditions, the indicator comprising:input means (5) for various control parameters of the engine and of the gearbox,calculation means (6) connected to said input means (5) which, on the basis of values of the control parameters and the values of limits for various regimes in which the engine is used, express a collective-pitch value, anddisplay means (4, 8, 9) comprising a power margin scale (8) which is graduated in collective-pitch equivalents and is capable of moving past a collective-pitch index (9) in a window (4) of a display screen (7), said display means further showing on said display screen (7);the value of the collective-pitch, andpitch indications of a first limit for each of the flight regimes, wherein the difference on the power margin scale (8) between the collective-pitch value and the first limit gives a representation of the power margin available to a pilot of the rotary-wing aircraft.