Question on curb impact/launch height

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MSI
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Question on curb impact/launch height

Post by MSI »

Q: (rcd via email)
  • A car went out of control and mounted a curb (grass median) at an approach angle of about 45 degrees. It went airborne onto the opposite side of the road, going over the bonnet of a car traveling in the opposite direction, and pushing the car and its bonnet cover to the side.
    Any ideas on how to determine the take-off angle and the trajectory of the car based on marks on the grass median and landing area, and hence the speed of the car.
    I have seen the entry by MSI Curb Impacts where a member asked about using curb height as rise and wheelbase. Unfortunately, I do not have access to SAE and hence do not have details or the conclusions of findings reported by those 4 papers, whether they contain any info useful to me. Also, are there any newer papers on the subject?
    Thank you very much for your time and effort in replying this question!
A: Hello.
1st item 2nd item:
  • The type of vehicle striking the curb, the curb type and height of curb make for different 'launch' or 'take-off' angles from the curb.
    Also, any roadway slope prior to the curb impact
    • was the median from a flat or curved roadway section?
    • was the median flat or sloped
    i believe some of those cited papers were to quantify the rise response of the vehicle in response to the curb impact.
I will take a look to see if any other papers which might include full scale tests of vehicle impacts on curbs and will add to this thread in the next few days.

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