Patent ID: 9452833
Filing Date: 2016-09-27
CPC Classification: B64C,B64D

Claim Text:
1. A drainage mast to drain fluids from one compartment of an aircraft into the atmosphere by gravity even when the pressure in the compartment is below atmospheric pressure, the drainage mast being disposed at an acute angle α with respect to the compartment in an airflow direction and configured with a cross section having a decreasing area from its entry section in the bottom zone of the compartment to its outlet section, the drainage mast further comprising: entry and outlet sections each having two perpendicular axes of symmetry of different length; the entry section being arranged with its longer axis of symmetry substantially parallel to the airflow direction; a symmetrical configuration with respect to a plane substantially perpendicular to a fuselage envelope, passing through the longer axis of symmetry of the entry section; the ratio between the shorter axis and the longer axis of the outlet section being between 0.2 and 0.6, the outlet section being arranged with its longer axis of symmetry substantially perpendicular to the airflow direction.