End of trailer fairing for improved aerodynamic performance

A fairing for a back end of a trailer, comprising:

• a leading airflow surface that is configured to be oriented within an angular range from 8 degrees to 14 degrees to a surface of the trailer to which the fairing is configured to be attached, wherein the surface to which the fairing is configured to be attached is a top surface of the trailer;
• wherein the angular range is oriented with respect to the surface of the trailer to which the fairing is configured to be attached such that arms of the angular range are located rearward from a vertex of the angular range in a longitudinal direction of the trailer;
• a tailing airflow surface that engages the leading airflow surface at meeting location, wherein the tailing airflow surface is curved, wherein a common tangent line of the tailing airflow surface and the leading airflow surface is at the meeting location;
• and
• a frame that is configured to engage the surface of the trailer to which the fairing is configured to be attached.

A fairing for a back end of a trailer, comprising:

• a leading airflow surface that is configured to be oriented within an angular range from 5 degrees to 14 degrees to a surface of the trailer to which the fairing is configured to be attached;
• wherein the angular range is oriented with respect to the surface of the trailer to which the fairing is configured to be attached such that arms of the angular range are located rearward from a vertex of the angular range in a longitudinal direction of the trailer;
• a tailing airflow surface that engages the leading airflow surface at meeting location, wherein the tailing airflow surface is curved, wherein a common tangent line of the tailing airflow surface and the leading airflow surface is at the meeting location;
• and
• a frame that is configured to engage the surface of the trailer to which the fairing is configured to be attached;
• wherein the leading airflow surface is flat, wherein the flat leading airflow surface lies in a plane of the leading airflow surface, and wherein the common tangent line of the tailing airflow surface and the leading airflow surface at the meeting location lies in the plane of the leading airflow surface.