Outlet guide vane assembly for a turbofan engine

An aircraft comprising:

• a fuselage;
• a first wing extending from a first side of the fuselage and a second wing extending from a second side of the fuselage;
• and
• a propulsion system comprising:
• a first turbofan engine mounted to the first wing or the fuselage on the first side of the fuselage, the first turbofan engine defining a first circumferential direction and comprising a first unducted rotor assembly and a first plurality of outlet guide vanes positioned downstream of the first unducted rotor assembly, a first gap spacing defined by the first plurality of outlet guide vanes and extending along the first circumferential direction, wherein a first gap spacing location is between a 2 o'clock position and a 7 o'clock position, the first gap spacing being greater than an average gap spacing of the first plurality of outlet guide vanes;
• and
• a second turbofan engine mounted to the second wing or the fuselage on the second side of the fuselage, the second turbofan engine defining a second circumferential direction and comprising a second unducted rotor assembly and a second plurality of outlet guide vanes positioned downstream of the second unducted rotor assembly,
• a second gap spacing defined by the second plurality of outlet guide vanes and extending along the second circumferential direction, wherein a second gap spacing location is between a five o'clock position and a 10 o'clock position, the second gap spacing being greater than an average gap spacing of the second plurality of outlet guide vanes.

A turbofan engine defining a circumferential direction, the turbofan engine comprising:

• a turbomachine defining a pylon attachment location along the circumferential direction;
• an unducted rotor assembly drivingly coupled to the turbomachine, the unducted rotor assembly including a plurality of unducted rotor blades;
• and
• an NOGV plurality of outlet guide vanes positioned downstream of the plurality of unducted rotor blades, the NOGV plurality of outlet guide vanes including a first outlet guide vane and a second outlet guide vane adjacent the first outlet guide vane, a circumferential gap extending from the first outlet guide vane to the second outlet guide vane wherein the circumferential gap is greater than 360 degrees divided by NOGV, and the pylon attachment location is located outside of the circumferential gap, wherein the plurality of unducted rotor blades includes NB number of unducted rotor blades, wherein NB is greater than NOGV.