The Compression Ratio in aircraft design, specifically in the context of aircraft engines like reciprocating (piston) engines, is a measure of how much the air-fuel mixture is compressed within the engine’s cylinders. It is a key parameter that affects engine performance and efficiency.
The formula for calculating the Compression Ratio (CR) is as follows:
- The Volume of the Combustion Chamber is the volume of the space within the engine cylinder when the piston is at the bottom of its stroke, typically measured in cubic centimeters (cc) or cubic inches (in³).
- The Cylinder Volume is the volume of the space within the engine cylinder when the piston is at the top of its stroke, also typically measured in cubic centimeters (cc) or cubic inches (in³).