Electric Motor Torque

The cluster centers on debates about torque, power efficiency, RPM limitations, and angular momentum losses in electric motors and flywheels used for propulsion in drones, multicopters, vehicles, and helicopters.

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Keywords

EMF MPH KV AC RPM motor motors torque power rpm arm wheels wheel electric transmission

Sample Comments

coding123 • Oct 9, 2022 • View on HN

it sounds like they're using it for generating electricity, so power/torque problems go away (I would think)

jmole • May 13, 2018 • View on HN

i don't know a lot about the physics of it, but won't this run into power loss issues because of the constant changes in angular momentum of the main spinning gears?

0xbadcafebee • Feb 4, 2022 • View on HN

Just because a motor can sit on your desk and turn at 7k rpm doesn't mean it can pull a flying chair off the ground

vlovich123 • Jan 6, 2023 • View on HN

Would that change when using an electric motor?

snovv_crash • Oct 19, 2021 • View on HN

I guess the motors are lossy and some of it gets converted to heat if they speed the wheels up and down

jillesvangurp • Aug 22, 2022 • View on HN

Not if the motor is part of the wheel.

the8472 • Jul 21, 2025 • View on HN

The tractor wheel, the race bicycle wheel or the 50000RPM flywheel?

slaw • Nov 12, 2021 • View on HN

Motor that turns wheels is way stronger than human. Try to turn steering wheel with engine turned off.

jacquesm • May 1, 2014 • View on HN

Much higher frequency, not RPM! (there is no flywheel to go around...)

codewritinfool • Dec 28, 2018 • View on HN

A motor-generator is a better solution. Preferably with a big flywheel.