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PDOFPrincipal Direction of Force
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The Ford Escape struck the back of a 2013 Ford F150 at 0[degrees] PDOF, with an EDR-recorded longitudinal delta-V of 50 km/h (31 mph) resulting in a maximum crush of 43 cm.
Figure two shows the calculated X-Y plane PDOF (Principle Direction of Force) for the first 160 milliseconds of the impact, which had a linear trend line angle of 2.
The direction of the [DELTA]V, commonly referred to as the PDOF, is estimated visually from the residual crush by the reconstructionist.