Patent ID: 9656760
Date: 2017-05-23
CPC Classifications: B64D,F02C,Y10T

Claim:
1. A dual variable area engine inlet of a helicopter, comprising: a fuselage section; a horizontally oriented top wall section disposed to oppositely face the fuselage section at a distance; a main rotor pylon section extending between the fuselage section and the horizontally oriented top wall section; vertically oriented side wall sections respectively extending between the fuselage section and opposite ends of the horizontally oriented top wall section and being respectively disposed to face opposite sides of the main rotor pylon section at a distance, the fuselage section, a leading side of the horizontally oriented top wall section, the main rotor pylon section and a leading side of the vertically oriented side wall sections defining capture areas with forward-most portions thereof being forward facing openings through which airflow is drawn; and movable portions respectively disposed as components of the horizontally oriented top wall section within the capture areas to occupy and move between first and second positions respectively associated with non-constricted and constricted conditions of the capture areas and each being independently movable to reduce or increase respective heights of the capture areas.