A method of manufacturing an electrical rotor machine having a rotor shaft assembly with a rotor operably attached to a shaft and disposed within a stator, the shaft structured to rotate about a longitudinal axis of the machine, the method comprising: fabricating two or more subcores formed of a plurality of laminations, the subcores including a plurality of winding channels along an axial length of each subcore, the winding channels being structured to receive stator windings; fabricating a housing having a wall defining a volume, the housing being structured to support the subcores within the volume, the housing further including a plurality of apertures through the wall and a plurality of locating features structured to position the subcores, wherein the plurality of apertures are circumferentially spaced about the wall and the plurality of locating features are positioned between the apertures; inserting each subcore into the volume of the housing, wherein the subcores seat against opposing sides of the locating features, whereby a plurality of radial channels is formed between the subcores, each radial channel aligned and in communication with at least one of the apertures of the housing; each radial channel defined by the space between the subcores; and installing the stator windings in the winding channels of the subcores to form a stator within the housing, whereby the stator windings extend through the winding channels of adjacent subcores; forming a plurality of stator ducts through each of the subcores such that the stator ducts, forming an outer axial coolant path, and the radial channel, forming a radial coolant path, together form a flow path (50, 54) extending from an entrance of each aperture to an exit of the stator ducts, wherein the stator ducts are arranged in concentric rings having different radii from a centroid of each lamination of the subcores and a first set of stator ducts, forming a first concentric ring, is staggered relative to a second set of stator ducts, forming a second concentric ring, such that the first set of stator ducts is not radially in line with the second set of stator ducts; forming an inner axial coolant path that extends from the radial channel through a rotor gap between the stator and the rotor shaft assembly; and wherein the stator comprises two subcores positioned by the locating features therebetween and wherein the locating features do not interfere with or block the flow of coolant through the radial channel. fabricating two or more subcores formed of a plurality of laminations, the subcores including a plurality of winding channels along an axial length of each subcore, the winding channels being structured to receive stator windings; fabricating a housing having a wall defining a volume, the housing being structured to support the subcores within the volume, the housing further including a plurality of apertures through the wall and a plurality of locating features structured to position the subcores, wherein the plurality of apertures are circumferentially spaced about the wall and the plurality of locating features are positioned between the apertures; inserting each subcore into the volume of the housing, wherein the subcores seat against opposing sides of the locating features, whereby a plurality of radial channels is formed between the subcores, each radial channel aligned and in communication with at least one of the apertures of the housing; each radial channel defined by the space between the subcores; and installing the stator windings in the winding channels of the subcores to form a stator within the housing, whereby the stator windings extend through the winding channels of adjacent subcores; forming a plurality of stator ducts through each of the subcores such that the stator ducts, forming an outer axial coolant path, and the radial channel, forming a radial coolant path, together form a flow path (50, 54) extending from an entrance of each aperture to an exit of the stator ducts, wherein the stator ducts are arranged in concentric rings having different radii from a centroid of each lamination of the subcores and a first set of stator ducts, forming a first concentric ring, is staggered relative to a second set of stator ducts, forming a second concentric ring, such that the first set of stator ducts is not radially in line with the second set of stator ducts; forming an inner axial coolant path that extends from the radial channel through a rotor gap between the stator and the rotor shaft assembly; and wherein the stator comprises two subcores positioned by the locating features therebetween and wherein the locating features do not interfere with or block the flow of coolant through the radial channel.