Actuation motor with cooling fins

A method of forming a housing of an electromechanical actuation motor, the method comprising:

• building, with a layer-by-layer additive manufacturing process, a first housing having an outer surface with a plurality of fins extending radially outward from the outer surface, wherein each fin comprises:
• a first portion integrally formed with and attached to the outer at a first end of the first portion;
• and
• a second portion attached to and integrally formed with a second end of the first portion, wherein the first portion intersects the second portion such that the first and second portions of each fin form a T shape;
• wherein:
• the second portions of the plurality of fins are spaced to form a heat shield that blocks radiant heat from reaching the first housing;
• and
• a ratio of the length of the first portion to a length of the second portion is approximately 4:1.

An assembly for actuating a sync ring in an aircraft, the assembly comprising:

• an electromechanical actuation motor comprising:
• a first housing with a centerline axis passing through a center of the first housing, wherein the first housing comprises:
• a first circumferential row of fins connected to and extending radially from an outer surface of the first housing, wherein the first housing and the first circumferential row of fins are formed as a single piece of material via layer-by-layer additive manufacturing, wherein each fin of the first circumferential row of fins comprises:
• a first portion integrally formed with and attached to the outer surface of the first housing at a first end of the first portion;
• and
• a second portion attached to and integrally formed with a second end of the first portion, wherein the first portion is longer than the second portion, wherein the first portion intersects the second portion such that the first and second portions of each fin form a T shape;
• a series of stator windings disposed inside of the first housing;
• a drive shaft that is rotatably driven by the stator windings;
• and
• the sync ring operably connected to the drive shaft of the electromechanical actuation motor, wherein the electromechanical actuation motor is configured to actuate a portion of the sync ring;
• wherein:
• the second portions of the plurality of fins are spaced to form a heat shield that blocks radiant heat from reaching the first housing;
• and
• a ratio of the length of the first portion to a length of the second portion is approximately 4:1.