A nacelle inlet, comprising: a lip skin including an outer flange and an inner flange, wherein at least one orifice is formed in a bottom portion of the outer flange, wherein the bottom portion of the outer flange is configured to be located distal to a wing and 180° from a pylon in an underwing mounted nacelle, or located 90° from a pylon in a nacelle side mounted to a fuselage, when the nacelle is mounted to an aircraft; and a bulkhead mounted to the lip skin, the bulkhead comprising: a forward face; a first flange extending axially from an outer circumference of the forward face; and a ventilation groove formed in the forward face, wherein the ventilation groove is formed at a bottom portion of the forward face; wherein the ventilation groove is circumferentially aligned with the at least one orifice, wherein a first distance measured axially between an aft edge of the first flange and a plane normal to a center axis of the bulkhead is different from a second distance measured axially between the plane and the aft edge of the first flange, and wherein said first distance is measured at a first location on the aft edge of the first flange and said second distance is measured at a second location on the aft edge of the first flange, said second location being circumferentially offset from said first location; and wherein the outer flange of the lip skin is coupled to the first flange of the bulkhead, and wherein a first distance measured axially between an aft edge of the outer flange and a plane normal to the center axis of the bulkhead is greater than a second distance measured between the plane and the aft edge of the outer flange, and wherein said first distance is measured at a first location on the aft edge of the outer flange and said second distance is measured at a second location on the aft edge of the outer flange, said second location being circumferentially offset from said first location, and wherein the plane and a forwardmost point of the lip skin are coplanar. a lip skin including an outer flange and an inner flange, wherein at least one orifice is formed in a bottom portion of the outer flange, wherein the bottom portion of the outer flange is configured to be located distal to a wing and 180° from a pylon in an underwing mounted nacelle, or located 90° from a pylon in a nacelle side mounted to a fuselage, when the nacelle is mounted to an aircraft; and a bulkhead mounted to the lip skin, the bulkhead comprising: a forward face; a first flange extending axially from an outer circumference of the forward face; and a ventilation groove formed in the forward face, wherein a forward face; a first flange extending axially from an outer circumference of the forward face; and a ventilation groove formed in the forward face, wherein the ventilation groove is formed at a bottom portion of the forward face; wherein the ventilation groove is circumferentially aligned with the at least one orifice, wherein a first distance measured axially between an aft edge of the first flange and a plane normal to a center axis of the bulkhead is different from a second distance measured axially between the plane and the aft edge of the first flange, and wherein said first distance is measured at a first location on the aft edge of the first flange and said second distance is measured at a second location on the aft edge of the first flange, said second location being circumferentially offset from said first location; and wherein the outer flange of the lip skin is coupled to the first flange of the bulkhead, and wherein a first distance measured axially between an aft edge of the outer flange and a plane normal to the center axis of the bulkhead is greater than a second distance measured between the plane and the aft edge of the outer flange, and wherein said first distance is measured at a first location on the aft edge of the outer flange and said second distance is measured at a second location on the aft edge of the outer flange, said second location being circumferentially offset from said first location, and wherein the plane and a forwardmost point of the lip skin are coplanar.