The Exosent Air Foil (Wing) was designed and patented in 2018
The air foil reduces drag coming off the rear of the tank
The drag reduction reduces fuel consumption by approximately 0.3 mpg
Air Foil physics explained here
Graphic demonstrate Computation Fluid Dynamics on the trailer: Top graphic with air foil. Bottom graphic without airfoil. The foil reduces reduces drag, improving fuel mileage.
