What is an engine's displacement if the Bore is 2.5 inches and the Stroke is 3.5 inches?

To calculate an engine's displacement, you can use the formula:

Displacement = π/4 × Bore² × Stroke × Number of Cylinders

In this scenario, since the problem doesn’t specify a number of cylinders, we will assume it's for a single-cylinder engine.

First, plug in the bore and stroke measurements into the formula:

1. Convert the bore and stroke into their respective measurements:

   • Bore = 2.5 inches
   • Stroke = 3.5 inches

2. Calculate Bore squared:

   • Bore² = (2.5 inches)² = 6.25 square inches

3. Next, multiply this value by the stroke:

   • 6.25 square inches × 3.5 inches = 21.875 cubic inches

4. Finally, adjust this using π/4:

   • Displacement = (π/4) × 21.875 cubic inches
   • Approximately, π/4 is about 0.7854.
   • Therefore, Displacement ≈ 0.7854 × 21.875 cubic inches ≈ 17.189 cubic inches.

When rounding, this value is typically rounded to the nearest cubic inch, which gives