Slippage (\( \% \text{Slip} = \frac{R - r}{r} \times 100 \)):

Where:

• \( \% \text{Slip} \) is the percent wheel slip, in percentage (%).
• \( R \) is the total drive wheel revolution count to traverse the drawbar runway under no load, in revolutions (rev).
• \( r \) is the total drive wheel revolution count to traverse the drawbar runway under load, in revolutions (rev).