specific power

In science and engineering, power is the rate at which work is done or energy is delivered. It is distinct from energy, which is the capacity to perform work. Power is calculated by dividing the work done or energy transferred by the time interval in which it occurs. The standard unit for power is the watt, which is equivalent to one joule per second.

A key concept in engineering, particularly for engines, is specific power. This measures the power generated per unit of airflow, indicating how much power an engine produces relative to its size and the amount of air it processes. This metric is significantly influenced by the peak gas temperature within the engine's combustion chamber. Modern engines can achieve specific power outputs ranging from 150 to 250 horsepower per pound per second.123