Definition of flywheel in US English:



  • A heavy revolving wheel in a machine that is used to increase the machine's momentum and thereby provide greater stability or a reserve of available power during interruptions in the delivery of power to the machine.

    • ‘In a momentary outage, the flywheel may eliminate the need for the batteries to take on the load at all.’
    • ‘Lie, cheat, fix the rules, buy influence and ensure, always ensure, that a government's political outlook fits like a flywheel to your corporate machine.’
    • ‘This one has a 14-foot moldboard and 243 horsepower at the flywheel.’
    • ‘Just as important as these fuels, however, are such innovative micropower technologies as fuel cells, turbines, and flywheels.’
    • ‘A lighter flywheel, electronic throttle and stiff driveshaft are designed to make response as quick as possible.’
    • ‘It chronicles which transmission plants use in-house pistons, oil pumps, and flywheels, as opposed to those purchased elsewhere.’
    • ‘In a 1,000-horsepower engine, 150 horsepower never reaches the flywheel.’
    • ‘Tiny cogs and flywheels rolled or flew into the corners of the room.’
    • ‘They also make engine parts for automobiles; the broken part, such as a flywheel or cog, serves as the imprinted pattern for casting the solid core.’
    • ‘He said the 41 ft long steam engine, with a flywheel 14 ft in diameter, was in very good condition.’
    • ‘I'm not an advocate of external balancing, which puts a portion of the required counterweight on the flywheel and balancer.’
    • ‘On one occasion the doctor was driving down St Aubyn Street when the flywheel came off, cartwheeled away and was lost.’
    • ‘The system uses a 120-pound flywheel that is powered by electricity; once power is cut, the flywheel continues to spin using its own momentum.’
    • ‘Here a flywheel is revolved by a motor until a preset speed is reached.’
    • ‘Also, flywheels can increase vehicle efficiency in both battery powered and hybrid vehicles.’
    • ‘You aren't pushing any harder, but the flywheel is accelerating, its momentum building, its speed increasing.’
    • ‘Add to that the rotational inertia of the flywheel and driveshaft, and you're well over 2,500 foot-pounds.’
    • ‘These are the ones with a fixed wheel and a heavy flywheel with loads of centrifugal force.’
    • ‘These could be created on the surface of brake rotors or on flywheels.’
    • ‘A flywheel can supply power for only a short time, about one minute at most.’