Abstract: An aerodynamic device for attachment to a trailer of a tractor-trailer having a centerline, a trailer sidewall and a trailer door. The aerodynamic device comprises an airfoil and a flexible mounting system. The airfoil comprises a leading edge, a trailing edge, an inner surface, and an outer surface. The flexible mounting system comprises a door hinge, a mounting bracket, a trailer hinge and a door strap. The door hinge is coupled to the trailer door. The mounting bracket is coupled to the inner surface of the airfoil. The trailer hinge is coupled to the mounting bracket and the trailer sidewall. The door strap coupled to the door hinge at a first end and the mounting bracket at a second end.

Abstract: System and apparatus for improving aerodynamics of a vehicle including: a plurality of stiffeners offset from each other; a first airfoil configured as a thin-form sheet; a second airfoil coupled to the first airfoil using the plurality of stiffeners, wherein a trailing edge of the first airfoil overlaps a leading edge of the second airfoil; an airflow inlet defined by a leading edge of the first airfoil and a pair of stiffeners of the plurality of stiffeners; and an airflow outlet defined by the trailing edge of the first airfoil, the leading edge of the second airfoil, and the pair of stiffeners.

Abstract: System and apparatus for improving aerodynamics of a vehicle including: a plurality of stiffeners offset from each other; a first airfoil configured as a thin-form sheet; a second airfoil coupled to the first airfoil using the plurality of stiffeners, wherein a trailing edge of the first airfoil overlaps a leading edge of the second airfoil; an airflow inlet defined by a leading edge of the first airfoil and a pair of stiffeners of the plurality of stiffeners; and an airflow outlet defined by the trailing edge of the first airfoil, the leading edge of the second airfoil, and the pair of stiffeners.

Abstract: System and apparatus for improving aerodynamics of a vehicle including: a plurality of stiffeners offset from each other; a first airfoil configured as a thin-form sheet; a second airfoil coupled to the first airfoil using the plurality of stiffeners, wherein a trailing edge of the first airfoil overlaps a leading edge of the second airfoil; an airflow inlet defined by a leading edge of the first airfoil and a pair of stiffeners of the plurality of stiffeners; and an airflow outlet defined by by the trailing edge of the first airfoil, the leading edge of the second airfoil, and the pair of stiffeners.

Abstract: System and apparatus for improving aerodynamics of a vehicle including: a plurality of stiffeners offset from each other; a first airfoil configured as a thin-form sheet; a second airfoil coupled to the first airfoil using the plurality of stiffeners, wherein a trailing edge of the first airfoil overlaps a leading edge of the second airfoil; an airflow inlet defined by a leading edge of the first airfoil and a pair of stiffeners of the plurality of stiffeners; and an airflow outlet defined by by the trailing edge of the first airfoil, the leading edge of the second airfoil, and the pair of stiffeners.

Abstract: An apparatus for the improvement of the aerodynamic properties of a primary vehicle or the aerodynamic properties of a secondary vehicle, such as a trailer, towed by a primary vehicle. Certain embodiments of the invention include an apparatus and a system typically mounted to a rear-ward portion of a semi-trailer for aerodynamic improvement. Certain embodiments of the invention include an airfoil and a stabilizer interconnected by a series of stiffeners spanning between them creating apertures for interaction with air-flow surrounding the trailing edge of a vehicle.