Pitch range for a variable pitch fan

A variable pitch fan for a propulsion device, the variable pitch fan comprising:

• a plurality of fan blades coupled to a disk, each fan blade of the plurality of fan blades extending radially outward from the disk, each fan blade extending along a span from a root to a tip, a portion of the span adjacent the root defining a root span region, a portion of the span adjacent the tip defining a tip span region, each fan blade rotatable about a pitch axis to vary a pitch of the fan blade;
• a pitch change actuation assembly for varying the pitch of the plurality of fan blades, the actuation assembly comprising:
• a scheduling ring rotatable relative to the disk and defining a plurality of slots,
• a plurality of linkage arms,
• a plurality of sliding members, and
• an electric motor;
• and
• a rotatable front hub covering the disk,
• wherein each linkage arm is coupled to one fan blade of the plurality of fan blades, each sliding member is rotatably connected to one linkage arm of the plurality of linkage arms, and each sliding member is slidably coupled to one slot of the plurality of slots to operatively couple the fan blades to the slots, wherein the plurality of slots includes at least one linear slot and at least one non-linear slot,
• wherein the electric motor is operatively coupled to the scheduling ring to rotate the scheduling ring relative to the disk,
• wherein each of the plurality of fan blades rotates according to a blade pitch schedule defined by the slot to which it is operatively coupled,
• wherein at least two of the plurality of slots define different blade pitch schedules,
• wherein a solidity of the variable pitch fan is at least 1.0 in the root span region of each blade,
• wherein the solidity of the variable pitch fan is less than 1.0 in the tip span region of each blade,
• wherein a fan hub radius ratio of the variable pitch fan is less than about 0.40, and
• wherein the pitch axis of each of the plurality of fan blades extends radially through the fan blade, the pitch variable within a pitch range, the pitch range being at least 80°.