A New Empirical Law for the Prediction of the Zero-Lift Pitching Moment Coefficient of Swept and Tapered Wings

A new empirical law for the prediction of zero-lift pitching moment coefficient trapezoidal wings with linear twist and constant taper sweep in subsonic flow is introduced. This quite general that it does not rely on use charts spans normal range values ratio, aspect aircraft. It not, however, accommodate different airfoils along wingspan only positive has been considered. The was first derived incompressible regime then an additional compressibility effect provided. results compare favorably experimental data straight some pre-existing methods low to moderate sweep. also shown most widely used method estimating highly inaccurate.