Minimum area smoke evacuation nozzle
AssigneeThe United States of America as represented by the Secretary of Transportation
InventorThor I. Eklund
Life of this patent
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Abstract
A smoke evacuation nozzle for an airplane having minimum diameter at the fuselage pressure hull exit for minimum structural integrity disruption. The nozzle is a converging-diverging nozzle which maintains sonic flow down to a very low altitude, thereby obtaining maximum airflow through it at all times. The throat is located at the point where the nozzle goes through the fuselage pressure hull so that the penetration through the fuselage pressure hull is minimal.
Claims13
In an airplane having a cabin ceiling, a fuselage pressure hull, and a vertical stabilizer, the improvement which comprises a smoke evacuation nozzle which maintains sonic flow at its throat at a nozzle pressure ratio of less than 2.
In an airplane having a pressurized compartment subject to being filled with smoke, said pressurized compartment being defined by physical boundaries, and a space enclosed within the outer envelope of the airplane but exposed to ambient air pressure, the improvement which comprises means for conducting the smoke from said pressurized compartment to said enclosed space.
Dependencies are inferred from the claim text.