impulsor

Example:The propeller was key to the plane's speed and efficiency.

Definition:A device, such as a turbine or a set of rotating blades, that propels or drives something, often used in aircraft or ships.

Example:He was an engineer at heart, constantly looking for ways to improve the system.

Definition:A person who practices or studies the discipline of engineering, designing, or operating machines, structures, or engines, or a practitioner of a particular engineering discipline, such as mechanical engineer or electrical engineer.

Example:He was an instigator of social reform, initiating many new policies and practices.

Definition:A person who initiates a course of action, usually one that results in some kind of often disruptive effect or change, such as political instigator or change instigator.