What is the approximate piston displacement of a four-cylinder aircraft engine with a cylinder bore of 3.78 inches and a depth of 8.5 inches?

To calculate the approximate piston displacement of a four-cylinder aircraft engine, you can use the formula for the volume of a cylinder, which is:

[

Volume = \pi \times \left(\frac{Bore}{2}\right)^2 \times Depth

]

Where:

• Bore is the diameter of the cylinder.

• Depth is the stroke length.

In this case, the bore is 3.78 inches, and the depth (stroke) is 8.5 inches. First, you calculate the radius of the cylinder by dividing the bore by 2:

[

Radius = \frac{3.78}{2} = 1.89 \text{ inches}

]

Next, you find the cross-sectional area of one cylinder:

[

Area = \pi \times (1.89)^2 \approx 11.23 \text{ square inches}

]

Now, calculate the volume of one cylinder using the area and the stroke:

[

Volume = Area \times Depth

]

[

Volume = 11.23 \times 8.5 \approx 95.46 \text{ cubic inches}

]

Since this is a four-cylinder engine, you multiply the volume