What is the displacement for a Bore of 1.75 inches and a Stroke of 3.25 inches?

Study for the FFA Small Engines Career Development Event Test. Use flashcards and multiple-choice questions with hints and explanations to prepare. Get exam-ready now!

To find the displacement of an engine, you can use the formula:

Displacement = (π/4) × Bore² × Stroke × Number of Cylinders.

In this case, if we are considering a single-cylinder engine, we can simplify the calculation.

  1. Convert the bore and stroke from inches to the appropriate values in the formula:

    • Bore (diameter) = 1.75 inches
    • Stroke (length) = 3.25 inches
  2. Calculate Bore²:

    • Bore² = (1.75 inches)² = 3.0625 square inches.
  3. Multiply by Stroke:

    • Bore² × Stroke = 3.0625 square inches × 3.25 inches = 9.953125 cubic inches.
  4. Now apply the π/4 factor for the cylindrical calculation:

    • Displacement = (π/4) × 9.953125 cubic inches.
  5. Approximating π as about 3.14, the calculation becomes:

    • (3.14 / 4) × 9.953125 = 0.785 × 9.953125 ≈ 7.81 cubic inches.

This value rounds to

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