What is the displacement of an engine with a Bore of 2 inches and a Stroke of 2.9 inches?

To determine the displacement of the engine, you can use the formula for calculating the volume of a cylinder, which is the shape of the combustion chamber in most small engines. The formula for the displacement (volume) of a single cylinder is:

[ \text{Displacement} = \pi \times \left( \frac{B}{2} \right)^2 \times S ]

Where:

• B is the bore (diameter of the cylinder)
• S is the stroke (the distance the piston travels)
• (\pi) (pi) is approximately 3.14

In this case, plugging in the values:

1. Bore (B = 2) inches, so the radius (Bore/2) is (1) inch.
2. Stroke (S = 2.9) inches.

Now we can calculate the displacement:

• Volume = (\pi \times (1^2) \times 2.9)
• Volume = (\pi \times 1 \times 2.9)
• Volume ≈ (3.14 \times 2.9)
• Volume ≈ (9.086) cubic inches.