In flight mechanics, the term “total head behind the disc” refers to the total energy that exists behind a rotating propeller or rotor disc in an aircraft. It is also known as “total pressure recovery” or “total pressure behind the disc.”
“pā + 1/2 * Ļ * v^2ā”
Atmospheric pressure (p)infinite in n/m^2
Density (Rho) in kg/m^3
Velocity (v) in m/s