Introduction
The reference area and lengths for a VSPAERO case are defined under the Overview tab in the GUI. These values may be input manually or from any Wing component in the model. These reference values are used to nondimensionalize the aerodynamic loads from a VSPAERO run. Note that the reference span (bref) is used with the rolling and yawing moment coefficients (CMx and CMz) and the reference chord (cref) is used with the pitching moment coefficient (CMy).