Patent ID: 6595742
Filing Date: 2003-07-22
Classification: B64D,F02C,Y02T

Abstract:
An air induction system for a helicopter to receive intake air, remove contaminants from said intake air, and provide said intake air for delivery to an engine at a pressure which is substantially independent of whether the helicopter is moving in a forward direction or hovering with no forward motion, the helicopter having a longitudinal axis and a generally horizontal rotor, the system comprising:a first entryway for receiving intake air, the first entryway positioned on the helicopter generally facing said forward direction and perpendicular to said longitudinal axis such that forward motion of the helicopter directs intake air to flow directly into said first entryway with an elevated pressure due to said forward motion; a first barrier filter mounted across said first entryway, the first filter having a porous media and positioned such that all air received in said first entryway flows to said first filter; a second entryway for receiving intake air, the second entryway positioned below said rotor and facing generally upwardly such that during hovering flight, said rotor directs intake air downwardly to flow directly into said second entryway with an elevated pressure due to downward motion; and a second barrier filter mounted across said second entryway, the second filter having a porous media and positioned such that all air received in said second entryway flows to said second filter.