A flywheel is a heavy disc attached to the end of a rotating shaft that helps smooth out the engine’s power pulses and store energy through rotational momentum. Related: What Is a Misfire and What ...

After years of being billed as the next great revolutionary means of propulsion, flywheels may finally be ready for prime time. Aside from a few modest successes, flywheels have not lived up to this ...

Powering a satellite with batteries can limit the spacecraft's operational life to about five years. A mechanical alternative, the flywheel, can store more energy and be reused more often than ...