Horsepower (\( HPe \)):

\[ HPe = \frac{S}{0.3048} + \frac{A + B \cdot (3.28 \cdot L)}{100} \]

Where:

• \( HPe \) is the horsepower (empty), in horsepower (hp).
• \( S \) is the belt speed, in meters per minute (m/min).
• \( A \) is a constant, ranging from 0.20 to 0.48 for 36-76 belt width.
• \( B \) is a constant, ranging from 0.00140 to 0.00298 for 36-76 belt width.
• \( L \) is the belt length, in meters (m).