An instrument used to estimate or compute the power output and rotational force of an engine or motor. It commonly takes inputs such as engine speed (RPM) and either power or force to derive the other value. For example, entering RPM and torque yields an estimated horsepower value.
Understanding the relationship between these measures is essential for optimizing performance in various mechanical systems. Knowledge of these values aids in selecting appropriate engines or motors for specific applications, enhancing efficiency, and preventing potential mechanical failures. Historically, the development of methods to quantify these values has paralleled advancements in engine design and optimization.