An aerodynamic vehicle cross bar having projections with notches

摘要

A roof rack cross bar is disclosed. The roof rack cross bar has an approximately rectangular cross section where: (a) the leading face of the cross bar, as it is fitted to a vehicle, is shaped to have an upper and lower forward facing projection; (b) the projections have a plurality of notches that direct air flow around the bar thereby reducing audible noise produced by the cross bar; (c) the region intermediate the two projections is slightly recessed so as to form a groove intermediate the two projections; and (d) the transition between the groove and projections is smooth and the groove presents a concave surface to the airflow.