Finlets for aircraft aft-body drag reduction

A drag reducing system for an aircraft, comprising:

• at least one finlet attached to a rear half of an upswept portion of an aft-fuselage of the aircraft on each side of the aft-fuselage, wherein the upswept portion extends rearward starting at a breakline;
• wherein each finlet has a leading edge and a tail edge, each finlet being positioned nose-up relative to the direction of airflow about the aft-fuselage, and wherein each finlet is configured to reduce drag on the aircraft by providing a direct flow turning to move a vortex generated at the aft-fuselage by the airflow about the aft-fuselage, thereby straightening the vortex and reducing upsweep of the vortex, and wherein each finlet is configured to additionally reduce drag on the aircraft through generation of a secondary vortex oriented to induce downwash added to the vortex generated at the aft-fuselage, thereby further straightening the vortex generated at the aft-fuselage and reducing the upsweep of the vortex.