The specific gas constant () in inflight mechanics is a critical parameter derived from the molar gas constant and molar mass, It plays a pivotal role in describing gas behavior at different altitudes and speeds, influencing formulas for dynamic pressure and the speed of sound in the context of aircraft aerodynamics. The formula to calculate Specific gas constant as follows:
Where:
- : Specific gas constant in J/kg*k
- : Dynamic pressure in pa.
- : Density in kg/m3
- : Mach number.
- : Heat capacity ratio.
- : Temperature in Kelvin.