Design for Manufacturing of Streamlined Bed Cap

Pickup trucks are geometrically limited to the extent of which pressure drag can be reduced. Their boxy shape maximizes their carrying capacity, but reduces aerodynamic efficiency. A potential solution to this issue would be a mechanism which deploys a streamlined shape on the bed of the truck when it is at cruising (highway) speeds. This mechanism would also have to collapse back into the truck in order to use the bed of the truck. This mechanism would provide a simple, robust solution which would be able to increase the aerodynamic efficiency along with the fuel efficiency of the pickup truck.