Practical Economic Aspects of Tractor/Trailer Aerodynamics

The consumption of diesel fuel by intercity tractor/trailer combinations can be reduced significantly by improving the aerodynamics of the tractor/trailer combination. Theoretical data developed in the University of Maryland Wind Tunnel with 1/8th scale models is reconciled with actual vehicle tests conducted under closely controlled conditions. Reductions in fuel consumption offered by other features and devices are compared with the savings provided by aerodynamic features.