In the context of aircraft design, “density” of an airframe refers to the mass per unit volume of the airframe material. It is typically measured in units like kilograms per cubic meter (kg/m³).
- ρ = Density of the fluid (in kilograms per cubic meter, kg/m³)
- P = Pressure of the fluid (in pascals, Pa)
- R = Specific gas constant for the fluid (in J/(kg·K))
- T = Temperature of the fluid (in kelvin, K)