Horizontal folding wingtip

A system configured to improve a fuel efficiency of an aircraft, such that the system comprises:

• a wing that comprises an unfixed portion and a fixed portion, such that the unfixed portion rotates between an expanded wingspan and a reduced wingspan for the aircraft that allows ground operation of the aircraft at an airport that prohibits ground operation of aircraft with the expanded wingspan;
• a rotating portion of the unfixed portion configured to rotate between a flight position and a folded position;
• a first member of the rotating portion configured to:
• support the unfixed portion, connect the unfixed portion to the fixed portion, and slide into a third member of the fixed portion;
• a track extension of the first member configured to fit into a track of the fixed portion, and support and guide the first member in:
• the flight position, the folded position, and transition between the flight position and the folded position;
• a joint that comprises a first joint member and a second joint member, the joint configured to allow rotation of the unfixed portion of the wing with respect to the fixed portion of the wing about a rotation axis, the rotation axis being one or more of vertical, substantially perpendicular to the wing, and substantially parallel to a yaw axis of the aircraft;
• and
• a drop portion configured to allow the unfixed portion of a wing of the aircraft to rotate horizontally back toward a tail of the aircraft.