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namerear steer dynamics.pdf

https://www.americansolarchallenge.org/ASC/wp-content/uploads/2013/01/Dr_Starr_Stability_Paper_-_Rev_20060811.pdf

ASC Paper Takeaways

  • Aspects of stability

    • rear end stability in turning and crosswinds

    • high-speed straight-line ability; reducing steering corrections

    • resistance to tipping in turns and sudden changes in road surfaces (from slippery to grippy)

    • “swapping ends” under hard braking? not quite sure what this means

  • CG must be a design specification

  • Slip angle stuff

    • Slip angle is a function of the lateral load, as well as the vertical load (on that tire)

    • generally, automotive tires have a max slip angle of around 10 degrees. further than that, and the vehicle will lose grip and slide

    • Image Added

      The plot of bike tire slip angles, showcasing how increasing load increases the lateral load for an X slip angle

      • this increase in grip is not proportional, however, with doubling the load from 67-135lb only yielding a 66% increase in lateral load

      • this is known as “load sensitivity”

      • coefficient of lateral load is the ratio of lateral to the vertical load

WIP

Starting topics:

  • 2 and 3 wheel steering

  • Stability

  • Suspension and steering design (specifically of single wheel)

  • Other 3 wheel solar cars

    • try to dig and find as much as possible abt MSI - MSX

    • any lessons from Aptera

  • Passenger placement and how it affects all the above factors