Nacelle

An aircraft, comprising:

• a gas turbine engine;
• and
• a nacelle encircling the gas turbine engine, comprising:
• an inlet cowling defining an inlet of the nacelle, wherein the inlet cowling comprises an inlet cowling outer surface defining an outermost circumferential surface of the inlet cowling and an inlet cowling aft edge spanning radially inward from the inlet cowling outer surface, wherein the inlet cowling aft edge comprises an aft edge length and an aft edge outer point which is the radially outermost point of the inlet cowling aft edge;
• and
• a boat tail cowling disposed aft of the inlet cowling, wherein the boat tail cowling comprises a boat tail cowling outer surface defining an outermost circumferential surface of the boat tail cowling, and a boat tail cowling forward edge spanning radially inward from the boat tail cowling outer surface, wherein the boat tail cowling forward edge comprises a forward edge length and a forward edge outer point which is the radially outermost point of the boat tail cowling forward edge, wherein the boat tail cowling forward edge is disposed adjacent to and abutting the inlet cowling aft edge,
• wherein the aft edge outer point of the inlet cowling aft edge is more radially outward than the forward edge outer point of the boat tail cowling forward edge, forming a step, the step being defined by a portion of the inlet cowling aft edge that is radially further outward than the forward edge outer point of the boat tail cowling forward edge.