The cross-sectional area of a cylinder bore in a piston engine can be calculated based on the bore’s diameter, which is typically measured in millimeters (mm) or meters (m). The formula for the cross-sectional area (A) of a circular bore is as follows:
- A is the cross-sectional area through which air enters (in square meters, m²).
- ṁ is the mass flow rate in kilograms per second (kg/s).
- ρ is the air density in kilograms per cubic meter (kg/m³).
- V is the velocity of the air entering the engine (in meters per second, m/s).