Abstract: Vanes are used for reducing drag on a moving vehicle having a substantially planar rear surface. The vanes are mounted to the vehicle using pliant material which creates no work for the driver of the vehicle during loading or unloading activities. The apparatus is extremely light weight, and includes a rigid vane of length L having a leading edge, a trailing edge, and an aerodynamic center positioned at a distance of between 0.15 L and 0.5 L from the leading edge. The vane has an inner surface facing the vehicle and an outer surface. Multiple pliant attachment devices connect the vane to the vehicle. The vane helps prevent or reduce formation of a zone of turbulent air behind the vehicle. The apparatus allows substantial reductions in fuel consumption and truck CO2 emissions during use.

Abstract: Vanes are used for reducing drag on a first vehicle having a substantially planar rear surface, where the first vehicle is used to tow an unpowered second vehicle. Rigid brackets or braces may be used to mount vanes to the first vehicle. The apparatus is extremely light weight, and includes a rigid vane of length L having a leading edge and a trailing edge. The vane has an inner surface facing the vehicle and an outer surface. A first rigid bracket or brace and a second rigid bracket or brace may connect the upper and lower ends of the vane to a side surface of the first vehicle, respectively. The vane prevents or reduces formation of a zone of turbulent air between the first and second vehicles by directing airflow away from an airspace between the first and second vehicles. The apparatus allows substantial reductions in fuel consumption. The apparatus also reduces tractor CO2 emissions during use as a result of reduced fuel consumption.

Abstract: Vanes are used for reducing drag on a moving vehicle having a substantially planar rear surface. The current disclosure describes a means for mounting vanes to a vehicle using pliant material which creates no work for the driver of the vehicle during loading or unloading activities. The apparatus is extremely light weight, and includes a rigid vane of length L having a leading edge, a trailing edge, and an aerodynamic center therebetween, positioned at a distance of between 0.15 L and 0.5L from said leading edge. The vane has an inner surface facing the vehicle and an outer surface. At least one first pliant attachment means connects the leading edge of the vane to a side surface of said vehicle; at least one second pliant attachment means connects the inner surface of said vane to a rear surface of said vehicle; and a third pliant attachment means connects the trailing edge of the vane to the vehicle. The second pliant attachment means is connected to the inner surface of the vane at a distance of between 0.

Abstract: The present invention relates to an apparatus with flexible attachments for reducing drag on a vehicle having a generally planar rear surface. The use of flexible vane attachments allows the rear doors of the trailer to fully open and close effortlessly. The apparatus includes a pair of vanes, each vane having a leading edge and a trailing edge. A first flexible attachment member connects an upper end of each vane's leading edge to a side of said vehicle, while a second flexible attachment member connects a lower end of each leading edge to the vehicle side. At least one third flexible attachment member connects the trailing edge of each vane to the rear surface of the vehicle. Other additional cables may be needed for additional vane support depending on vane length and profile. The vanes redirect air flowing along the sides of the vehicle into a volume of low pressure air behind said rear surface.

Abstract: The present invention relates to an apparatus with flexible attachments for reducing drag on a vehicle having a generally planar rear surface. The use of flexible vane attachments allows the rear doors of the trailer to fully open and close effortlessly. The apparatus includes a pair of vanes, each vane having a leading edge and a trailing edge. A first flexible attachment means connects an upper end of each vane's leading edge to a side of said vehicle, while a second flexible attachment means connects a lower end of each leading edge to the vehicle side. At least one third flexible attachment means connects the trailing edge of each vane to the rear surface of the vehicle. Other additional cables may be needed for additional vane support depending on vane length and profile. The vanes redirect air flowing along the sides of the vehicle into a volume of low pressure air behind said rear surface.