Impeller

An apparatus, comprising:

• a central structural member defining a longitudinal center axis and having an air inflow end and an air outflow end distal from the air inflow end;
• a plurality of strength members, each having a respective strength member root coupled to and extending from the central structural member, a respective strength member body extending from the respective strength member root, and a respective strength member tip extending from the respective strength member body distal from the respective strength member root;
• a hub having a hub inner surface, a spaced apart hub outer surface, a hub first diameter adjacent to the air inflow end, and a hub second diameter, larger than the hub first diameter, adjacent to the air outflow end, each respective strength member tip coupled to the hub inner surface;
• a plurality of core blades, each having a respective core blade root coupled to and extending from the hub outer surface, a respective core blade body, and a respective core blade tip distal from the respective core blade root, a hub thickness being interposed between a plurality of strength member tips and a plurality of core blade roots;
• a shroud having a shroud inner surface, a spaced apart shroud outer surface, each respective core blade tip coupled to the shroud inner surface;
• and
• a plurality of bypass blades each having a respective bypass blade root, a respective bypass blade body, and a respective bypass blade tip, each of the plurality of bypass blades coupled to and extending from the shroud outer surface.