Variable fan nozzle using shape memory material

A gas turbine engine comprising:

• a fan;
• a nacelle arranged about the fan;
• an engine core at least partially within the nacelle, the engine core having a compressor and a turbine;
• a fan bypass passage downstream of the fan between the nacelle and the engine core, for conveying a bypass airflow from the fan;
• a nozzle section for controlling the bypass airflow, wherein the nozzle section includes a shape memory material having a first solid state phase that corresponds to a first nozzle position and a second solid state phase that corresponds to a second nozzle position;
• the nozzle section includes tabs that include the shape memory material;
• the tabs extend from the nacelle in a generally axial direction relative to an axis of rotation of the fan;
• wherein the tabs taper in a radial thickness from a forward end toward a trailing end;
• and
• wherein the nozzle section includes a hollow section made of shape memory material, the hollow section defining a cavity therein and further comprising an actuator at least partially within the cavity.