Lexus HS 250h Aerodynamics

From the onset, ambitious goals were set requiring designers to work with aerodynamicists to create a low-drag form in an attractive, spacious, yet compact package. Their work yielded a top in class 0.27 coefficient of drag, which makes a considerable contribution to fuel economy, especially at highway speeds. Highlighted below are several features which contribute to the HS 250’s exceptional aerodynamic efficiency:

• Smooth transitions along the front fender and a-pillars avoid disturbance of the airflow
• Subtle front and rear bumper spoilers and a rear lip spoiler contribute to low drag and minimize lift
• The body’s sides taper from the center pillar to the rear where they meet slightly kicked out tail lamps, helping reduce drag-inducing wake turbulence
• The roof features a gull-wing shape which enabled designers to lower its profile to reduce air resistance. By adding in a naturally stiff shape, designers were also able to reduce its thickness, further reducing weight
• Several measures were also taken under the car to promote airflow and reduce drag: diffuser fins and smooth underbody trays reduce drag and while enhancing straight line control

The benefit of this attention to aerodynamic efficiency is outstanding fuel economy (the HS is 50% more fuel efficient than its near-luxury competitors), a quieter ride, and improved vehicle stability at high speeds.

The Lexus 2010 HS at Lexus of Watertown