IMPELLER WITH HUB SWEEP

An impeller (20) having a hub (22), blades (42, 44, 144, 244) extending from the hub (22) along respective spans (S) from roots (35) to tips (36), the blades (42, 44, 144, 244) extending along respective chords (C) from leading edges (42a, 44a, 144a, 244a) to trailing edges (42b, 44b), the leading edge (42a, 44a, 144a, 244a) of at least one of the blades (42, 44, 144, 244) having a cutback section (150, 250) defining a sweep at the root (35), the cutback section (150, 250) extending in a spanwise direction (D1) from the hub (22) to a location (L1) at least about 5% of the span (S) from the hub (22) of the at least one of the blades (42, 44, 144, 244), and the cutback section (150, 250) extending in a chordwise direction (D2) along at least about 5% of the chord (C) of the at least one of the blades (42, 44, 144, 244).