Aircraft nacelle inlet

An aircraft nacelle comprising:

• a fan casing;
• and
• an air inlet secured to the fan casing and comprising:
• a lip skin defining a curved surface of the inlet, the curved surface extending about a longitudinal axis of the inlet;
• a forward bulkhead;
• an inner barrel having a radially inner surface defining a surface of the inlet, a radially outer surface, and a sound attenuating layer arranged between the radially inner and radially outer surfaces;
• and
• a joining frame fixed to the lip skin and/or to the forward bulkhead;
• wherein a first portion of the joining frame extends over at least a portion of the sound attenuating layer of the inner barrel and is fixed to the radially outer surface of the inner barrel,
• wherein a second portion of the joining frame is substantially perpendicular to the first portion and defines a flat surface extending over an end surface of the inner barrel,
• wherein the joining frame further comprises a third portion, the third portion extending over at least a portion of the forward bulkhead, and
• wherein the third portion extends from the first portion and the second portion,
• wherein the joining frame is Y-shaped as viewed in cross-section, and the first, second and third portions of the joining frame respectively constitute three different legs of the Y-shape.