Vortex Generators – Tractor
Keeping the air flowing smoothly across the tractor-to-trailer started with cab extenders, sleeper extenders and most recently added sleeper top extenders to the cab. Some drivers and fleets have used vortex generators on the back edge of the cab or extenders to further guide the air flow to the trailer.
There are several suppliers of these systems. Some are installed individually while others come in longer strips to allow several to be installed simultaneously.
Benefits
Fuel Savings (If Coupled with Higher Capacity and Higher Voltage Electrical System)
Challenges
Not Available for Most Vehicles as of March 2017
Increased Complexity of Electrical System
Higher Electrical System Voltage and Power Output Required
Reliability Issues
Increased Maintenance Costs