Background to NHTSA NCAP Ratings for Rollover Resistance Why are they based on Static Stability Factor? Criticism of Rollover Ratings Vehicle properties have little effect Static Stability Factor (SSF) is too simplistic SSF does not reward Electronic Stability Control (ESC)
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Background to NHTSA NCAP Ratings for Rollover Resistance
Why are they based on
Static Stability Factor?
Phase II Rollover Testing
* ABS Failure
Monitoring ESC Effectiveness1996-7 Cadillac Seville, Deville, Eldorado1996-9 data from 9 statesNote: very scant data for Lexus LS 400 and M-B ML320 is more encouraging
Close to full lock
Approx. 270 degrees
Vehicle 1 Path
Vehicle 2 Path