Drawbar Horsepower (\( \text{DHP} = \xi_m \times \text{NEP} \)):

Where:

• \( \text{DHP} \) is the drawbar power, in horsepower (hp).
• \( \text{NEP} \) is the net engine power, in horsepower (hp).
• \( \xi_m \) is the mechanical efficiency, ranging from 0.75 to 0.81.