@ajtourville Main advantage of this is a much stronger EM field compared with a rotor that is held together by metal (usually high strength steel). Other advantage is that rotor can go to higher RPM, as carbon sleeve (mostly) stops copper rotor from expanding due to radial acceleration.— Elon Musk (@elonmusk) Jun 13, 2021June 14, 2021 at 01:27AMvia Twitter

@ajtourville Main advantage of this is a much stronger EM field compared with a rotor that is held together by metal (usually high strength steel). Other advantage is that rotor can go to higher RPM, as carbon sleeve (mostly) stops copper rotor from expanding due to radial acceleration.— Elon Musk (@elonmusk) Jun 13, 2021

June 14, 2021 at 01:27AM
via Twitter https://twitter.com/elonmusk

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Elon Musk

@elonmusk @ajtourville Main advantage of this is a much stronger EM field compared with a rotor that is held together by metal (usually high strength steel). Other advantage is that rotor can go to higher RPM, as carbon sleeve (mostly) stops copper rotor…