Patent ID: 7496433
Filing Date: 2009-02-24
Classification: B64C,B64D

Abstract:
1. A method of minimizing the noise emitted during take-off and landing of a rotorcraft ( 1 ) of a particular type of rotorcraft, the method being characterized in that in a preliminary flight period, in which a reference rotorcraft corresponding to a rotorcraft ( 1 ) of said particular type is used, the following steps are performed: a) taking a series of measurements on the reference rotorcraft, to obtain during preliminary flights, values for a plurality of noise levels detected by a plurality p of sensors C secured to the reference rotorcraft and representative of noise emission for n configurations of the reference rotorcraft, determined by: b) from said series of measurements, establishing a first series of n×p diagrams D c) transforming said first series of diagrams D d) selecting in each diagram D e) for each apparent weight MA, establishing the envelope of the curves L f) selecting in each flight domain DV, an operating domain DF which determines a set of m operating domains of the reference rotorcraft.