A turboprop engine with 200 Hp and 600 Shaft HP would have what effective horsepower (EHSP)?

To determine the effective horsepower (EHSP) for a turboprop engine, you typically start with the engine's outputs: mechanical power output measured in shaft horsepower (SHP) and other input power, such as the horsepower (Hp) rating for the propeller. In this particular case, the turboprop engine has a mechanical output of 600 Shaft HP and a related propeller output of 200 Hp.

The effective horsepower is a way to represent the total useful power available for propulsion. It generally takes into account both the shaft horsepower and the additional power provided by the propulsive efficiency of the engine. This calculation seeks to optimize how these power values integrate, often taking the form of an efficiency factor or calibration based on industry standards.

In this scenario, the effective horsepower can be assessed by totaling the SHP with the effective contribution of propeller horsepower, giving a comprehensive picture of the engine's power availability. Here, adding the propeller 200 Hp to 600 Shaft HP gives us an overall effective rating, leading to the calculated effective horsepower figure of 670 Hp.

This number is significant because it denotes how much total power is effectively usable for thrust in a turboprop setup, making it a crucial figure for understanding engine performance in