Nondimensionalization reduces the dependence of all aerodynamic forces and moments on density and airspeed to a simple factor. Without nondimensionalization, almost every term in the polynomial equations would include V and as variables.
The nondimensional forces and moments are defined by
The angle of attack and angle of sideslip, defined by Equations 5 and 6, are the nondimensional replacements for the dimensional wind-relative velocity components ( ua,va,wa).
Equations 50-52 define nondimensional
One other nondimensional parameter is defined analogously to the
nondimensional angular speeds.
the time derivative of
is used to account for the effect of downwash lag. Its
nondimensional form is:
The control deflections, which are angles, are already nondimensional.