An environmental control system cooled by an airflow , comprising: a motor cooling inlet to receive the airflow ; and a motor including: a rotor ; and a stator , and characterised in that the stator is a laminated stator arranged to receive the airflow from the motor cooling inlet , including: a first plurality of stator laminations with a first electrical conductivity and a first thermal conductivity; and a second plurality of stator laminations with a second electrical conductivity and a second thermal conductivity, wherein the second electrical conductivity is lower than the first electrical conductivity, the second thermal conductivity is higher than the first thermal conductivity, and the second plurality of stator laminations are disposed throughout the first plurality of stator laminations , and a thickness of each of the first plurality of stator laminations being greater than a thickness of each of the second plurality of stator laminations ; wherein a ratio between the first plurality of stator laminations and the second plurality of stator laminations is twenty to one. a motor cooling inlet to receive the airflow ; and a motor including: a rotor ; and a stator , and characterised in that the stator is a laminated stator arranged to receive the airflow from the motor cooling inlet , including: a first plurality of stator laminations with a first electrical conductivity and a first thermal conductivity; and a second plurality of stator laminations with a second electrical conductivity and a second thermal conductivity, wherein the second electrical conductivity is lower than the first electrical conductivity, the second thermal conductivity is higher than the first thermal conductivity, and the second plurality of stator laminations are disposed throughout the first plurality of stator laminations , and a thickness of each of the first plurality of stator laminations being greater than a thickness of each of the second plurality of stator laminations ; wherein a ratio between the first plurality of stator laminations and the second plurality of stator laminations is twenty to one. a rotor ; and a stator , and characterised in that the stator is a laminated stator arranged to receive the airflow from the motor cooling inlet , including: a first plurality of stator laminations with a first electrical conductivity and a first thermal conductivity; and a second plurality of stator laminations with a second electrical conductivity and a second thermal conductivity, wherein the second electrical conductivity is lower than the first electrical conductivity, the second thermal conductivity is higher than the first thermal conductivity, and the second plurality of stator laminations are disposed throughout the first plurality of stator laminations , and a thickness of each of the first plurality of stator laminations being greater than a thickness of each of the second plurality of stator laminations ; wherein a ratio between the first plurality of stator laminations and the second plurality of stator laminations is twenty to one. a first plurality of stator laminations with a first electrical conductivity and a first thermal conductivity; and a second plurality of stator laminations with a second electrical conductivity and a second thermal conductivity, wherein the second electrical conductivity is lower than the first electrical conductivity, the second thermal conductivity is higher than the first thermal conductivity, and the second plurality of stator laminations are disposed throughout the first plurality of stator laminations , and a thickness of each of the first plurality of stator laminations being greater than a thickness of each of the second plurality of stator laminations ; wherein a ratio between the first plurality of stator laminations and the second plurality of stator laminations is twenty to one. <EOS>