Reply To: NHTSA safety ratings and in-wheel motors

Aptera Community Aptera Discussions NHTSA safety ratings and in-wheel motors Reply To: NHTSA safety ratings and in-wheel motors

Aptera Community Aptera Discussions NHTSA safety ratings and in-wheel motors Reply To: NHTSA safety ratings and in-wheel motors

  • Paul Evans

    Member
    September 29, 2021 at 9:47 pm

    Good questions, George!

    Of some 40 global organizations, the best known in the US are:

    • National Highway Traffic Safety Administration (NHTSA), and;
    • Insurance Institute for Highway Safety (IIHS).

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    The full list is at: https://independentmotors.net/crash-test/

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    Of most interest to the Aptera community, NHTSA does rollover and roof crush resistance testing, and the dreaded “moose avoidance” test. IIHS does the frontal and offset crash tests that you specifically mention.

    As for front wheel separation concerns, there are three pretty robust copper cables attached to the in-wheel motors that may retain the wheel’s attachment to the body. In that sense, they are somewhat similar to Formula 1’s kevlar wheel retention requirement that keeps the wheels attached to a crashing car.

    In regards to your concerns about power disconnects, as far back as 2002, MINI Coopers had a power disablement system that triggered when the car experienced a very strong jolt. I know because a friend I was following suddenly pulled off to the side of the road and I stopped to help. He had hit the mother-of-all-potholes. We couldn’t figure out what happened so he called MINI who told him where the reset mechanism was. I don’t know if that’s a regulatory requirement here, but if so, I suspect there’s one or more vehicle subsystems supplier that could provide them to Aptera.