Reply by Authors to C. H. Murphy
(7) This correction for Run 585 is —2.4%. 3K2 and K2 are each reduced by 4.8% in Figs. 2 and 3 and lines refitted, with the results Ci = -0.00602, C2 = 0.000100, C3 = 0.02074, <74 = —0.0000380. Thus, we see that the quasi-linear technique can yield the nonlinear damping coefficients to 5% and the cubic static moment coefficient to 2% from the exactly calculated points. Analysis of Experimental Data The actual flight data can now be fitted by Eqs. (2-4) with the results given in Tables 1 and 2. The standard error of the fits is quite good, but 6" is now poorly predicted by Eq. (5). This probably means that (73 and (74 are not constants but must be allowed to be functions of Mach number,