A sump housing (10, 10a) for a lubricated structure (14, 16) rotating at relatively high speed, comprising: an outer wall (40, 40a) including an inner surface defining a chamber (44, 44a) and having a cylindrical portion; and an out-take (56, 56a) for lubricant scavenging by separating air moving in said sump housing from lubricant, said out-take (56, 56a) extending outwards from a chordal arc (58, 58a, 58b, 58c) of said cylindrical portion of said outer wall (40, 40a), and wherein said out-take (56, 56a) includes an upstream first portion (60, 60a, 60b) of said outer wall diverging outwards from said outer wall (40, 40a) at a first rate, extending from a first upstream point (64, 64a, 64b, 64c) on said cylindrical portion of said outer wall (40, 40a) to a first downstream point (66, 66a, 66b, 66c), said out-take (56, 56a) also includes a downstream second portion (62, 62a, 62b, 62c) of said outer wall (40, 40a) opposite said first portion (60, 60a, 60b), diverging outwards from said outer wall (40, 40a) and toward said first portion (60, 60a, 60b) at a second rate being greater than said first rate, said downstream second portion (62, 62a, 62b, 62c) extending from a first end on said cylindrical portion of said outer wall (40, 40a) to a second end (72, 72b, 72c), said first downstream point (66, 66a, 66b, 66c) and said second end (72, 72b, 72c) being located on a secondary arc concentric with said chordal arc (58, 58a, 58b, 58c); characterized in that said downstream second portion (62, 62a, 62b, 62c) being a wall (62, 62a, 62b, 62c) offset 0-20 degrees from perpendicular to a line (108, 108b) tangent to said chordal arc (58, 58a, 58b, 58c) in said first upstream point (64, 64a, 64b, 64c) at the intersection of said wall (62, 62a, 62b, 62c) with said line (108, 108b), said wall (62, 62a, 62b, 62c) facing said first portion (60, 60a, 60b) for limiting air from exiting said sump housing (10, 10a) through said out-take (56, 56a); and said upstream first portion (60, 60a, 60b) and said downstream second portion (62, 62a, 62b, 62c) cooperate such that during operation at least one air vortex is created in said out-take (56, 56a) for urging lubricant out of the sump housing while concurrently reducing the likelihood that air will exit the sump housing with the lubricant. an outer wall (40, 40a) including an inner surface defining a chamber (44, 44a) and having a cylindrical portion; and an out-take (56, 56a) for lubricant scavenging by separating air moving in said sump housing from lubricant, said out-take (56, 56a) extending outwards from a chordal arc (58, 58a, 58b, 58c) of said cylindrical portion of said outer wall (40, 40a), and wherein said out-take (56, 56a) includes an upstream first portion (60, 60a, 60b) of said outer wall diverging outwards from said outer wall (40, 40a) at a first rate, extending from a first upstream point (64, 64a, 64b, 64c) on said cylindrical portion of said outer wall (40, 40a) to a first downstream point (66, 66a, 66b, 66c), said out-take (56, 56a) also includes a downstream second portion (62, 62a, 62b, 62c) of said outer wall (40, 40a) opposite said first portion (60, 60a, 60b), diverging outwards from said outer wall (40, 40a) and toward said first portion (60, 60a, 60b) at a second rate being greater than said first rate, said downstream second portion (62, 62a, 62b, 62c) extending from a first end on said cylindrical portion of said outer wall (40, 40a) to a second end (72, 72b, 72c), said first downstream point (66, 66a, 66b, 66c) and said second end (72, 72b, 72c) being located on a secondary arc concentric with said chordal arc (58, 58a, 58b, 58c); characterized in that said downstream second portion (62, 62a, 62b, 62c) being a wall (62, 62a, 62b, 62c) offset 0-20 degrees from perpendicular to a line (108, 108b) tangent to said chordal arc (58, 58a, 58b, 58c) in said first upstream point (64, 64a, 64b, 64c) at the intersection of said wall (62, 62a, 62b, 62c) with said line (108, 108b), said wall (62, 62a, 62b, 62c) facing said first portion (60, 60a, 60b) for limiting air from exiting said sump housing (10, 10a) through said out-take (56, 56a); and said upstream first portion (60, 60a, 60b) and said downstream second portion (62, 62a, 62b, 62c) cooperate such that during operation at least one air vortex is created in said out-take (56, 56a) for urging lubricant out of the sump housing while concurrently reducing the likelihood that air will exit the sump housing with the lubricant.