초록 ▼

The duct (16) which delivers hot air (F) to the inside surface of the leading edge of a turbo-fan inlet cowl, for de-icing of the leading edge (11), is made double-walled (16,21) in order to safeguard from overheating the materials from which the cowl is constructed in the event of rupture of the du

The duct (16) which delivers hot air (F) to the inside surface of the leading edge of a turbo-fan inlet cowl, for de-icing of the leading edge (11), is made double-walled (16,21) in order to safeguard from overheating the materials from which the cowl is constructed in the event of rupture of the duct. Preferably the flow of hot air in the outer duct blows open a hinged door (26) in the skin (10) of the cowl to provide a visual indication of the rupture of the inner duct. The outer duct can be made narrow enough to maintain working pressure in the inner duct after rupture.

대표청구항 ▼

A duct within a hollow aerostructural component of an aircraft, the duct serving to convey hot air to a selected area on the inside surface of the skin of the component for preventing the accumulation of ice on the external surface of the skin in the selected area, wherein the duct is double-walled,

A duct within a hollow aerostructural component of an aircraft, the duct serving to convey hot air to a selected area on the inside surface of the skin of the component for preventing the accumulation of ice on the external surface of the skin in the selected area, wherein the duct is double-walled, in that it comprises an inner duct through which the hot air flows, an outer duct which contains the inner duct and which is connected to the periphery of an opening in the skin, thereby to contain such hot air as escapes from the inner duct, upon a rupture of the inner duct, and a door by which the opening in the skin is normally closed, which door is displaceable upon rupture of the inner duct, by the flow of hot air along the outer duct to the said opening, the displacement of the door serving to provide an indication of the rupture of the inner duct.