The flywheel system (developed by NRStor) uses 10 spinning steel flywheels on magnetic bearings. These parts include transmissions, oil pumps, pistons, timing gears, flywheels, valves, axles and joints. These principles are exploited by EDS (Electrodynamic Suspension), superconducting bearings, flywheels, etc. It used twin flywheels and had an aluminum crankcase. The "cross-hatch" pattern is used on brake rotors and flywheels. The catapult system for roller coasters has been replaced by flywheels and later linear motors. Can Motors, flywheels and all bogie power as well as catering for niche markets. Flywheels used in car engines are made of cast or nodular iron, steel or aluminum. Other hybrid powertrains use flywheels to store energy. The new guidelines will cover areas including batteries and supercapacitors as well as flywheels. They push on two cranks/flywheels which cause them to rotate, each in opposite directions. The engine utilises a smaller flywheels and an inconel exhaust manifold. Flywheels resist changes in rotational speed by their moment of inertia. Cast iron flywheels are used in old steam engines. Flywheels store energy in a spinning mass.