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A comment on Tiny electric motor can produce more than 1,000 horsepower. Parent comment

Re:Tiny electric motor can produce more than 1,000 horsepower by jesse__ on Monday November 03, 2025 @06:27PM (#45805732)
Somebody's probably already pointed this out, but in the case of motors, making them lighter can make a big difference.

For example, by making the flywheel in a clutch lighter, you reduce the amount of torque it takes to spin the flywheel. Saving 10 pounds there is not a 10/3000lb difference.. it could be a huge percentage of total power output.

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Re:Tiny electric motor can produce more than 1,000 horsepower by londons_explore on Tuesday November 04, 2025 @11:18AM (#45812673)
To be precise, the impact of mass inside the rotor of the motor is 2 * the mass * the rotor diameter / the wheel diameter * the drivetrain gear ratio.

For a typical EV, I think that works out to a factor of around 2.

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