Patent ID: 6616218
Filing Date: 2003-09-09
Classification: B62D,Y10S

Abstract:
A drag reduction device for use on a ground vehicle, comprising:a porous outer surface attached to the aft portion of a ground vehicle; a substantially solid inner surface; said porous outer surface comprising a first portion and at least one second portion: said first portion being attached to a trailing surface of the ground vehicle; said at least one second portion being attached to at least one side of said ground vehicle; and said porous outer surface and said substantially solid inner surfaces being separated from and substantially parallel to one another to form a space therebetween, such that the porous outer surface acts as a means for permitting the entrance and exit of air into and out of said space, whereby the asymmetric character of the external trailing wake flow field of the ground vehicle is changed to a substantially steady and laterally symmetric trailing wake flow field.