Gas turbine engine electrical generator

An aircraft gas turbine engine comprising:

• a main engine shaft arranged to couple a turbine and a compressor, the main engine shaft defining an axial direction;
• at least one radially extending offtake shaft coupled to the main engine shaft;
• and
• a radially extending electric machine coupled to the radially extending offtake shaft,
• wherein the electric machine comprises an axial flux electric machine in which a stator of the electric machine is axially offset relative to a rotor of the electric machine, and
• wherein a nacelle is provided surrounding the gas turbine engine, and
• wherein the nacelle comprises a space where an outer surface contracts inwardly before expanding outwardly downstream, the electric machine being provided at the space.