Abstract
Results of six tests of automobiles impacting a rigid simulate heavy vehicle under ride guard are presented in this report. The test vehicles represented three general classes of conventional automobiles: (1) small, lightweight rear engine vehicles, (2) standard full size medium weight automobiles, and (3) a heavy, luxurious type of automobile. Under ride guard clearance above the roadway was varied in the tests for which the nominal impact speeds were 40 MPH. Impact loads applied to the rigid under ride guard and the dynamic response of the vehicles were recorded, analyzed and evaluated.