Helicopter with engine air intakes

摘要

A helicopter with a fuselage, at least two engines substantially inside said fuselage, an air intake for each of said two engines and at least two separate lateral air inlet ports for said at least two engines in said fuselage. Said separate lateral air inlet ports being arranged on sides opposed to each other relative to an essentially vertical midplane of said fuselage and oriented with their respective cross section substantially parallel to a forward flight direction of the helicopter. At least one frontal air inlet port with a forward portion is provided separate from said lateral air inlet ports, said frontal air inlet port being located on a gear cowling of the fuselage oriented with its cross section substantially perpendicular to the forward flight direction of the helicopter.

主权项

1. A helicopter comprising:
a fuselage having an essentially vertical midplane separating a first lateral side and a second lateral side,
at least two engines substantially inside the fuselage,an air intake for each of the at least two engines,at least two separate lateral air inlet ports for the at least two engines in the fuselage, the lateral air inlet ports being arranged on sides opposed to each other relative to an essentially vertical midplane of the fuselage and oriented with their respective cross section substantially parallel to a forward flight direction of the helicopter, a first air duct fluidly coupling one of the lateral air inlet ports with one of the engines on the first lateral side, a second air duct fluidly coupling another of the lateral air inlet ports with another of the engines on the second lateral side, andat least one frontal air inlet port with a forward portion being provided separate from the lateral air inlet ports, the at least one frontal air inlet port being located on a gear cowling of the fuselage and being oriented with a cross section of the frontal air inlet port being substantially perpendicular to a forward flight direction, a third air duct fluidly coupling the frontal air inlet port with one of the engines on the first lateral side, a fourth air duct fluidly coupling the frontal air inlet port with another of the engines on the second lateral side,whereby a straight path for airflow through the at least one frontal air inlet port aligned with the longitudinal airflow is provided through the third air duct and the fourth air duct to each air intake of the engines, respectively, and two further separate paths through the separate lateral air inlet ports are provided through the first air duct and the second air duct to each air intake of the engines, respectively, wherein the first, second, third and fourth air ducts provide separate and independent airflow pathways to the respective air intakes of the engines such that airflow within each air duct remains separate from airflow within the other air ducts.