The centroidal radius of gyration of an airplane is determined by suspending the airplane...

The centroidal radius of gyration of an airplane is determined by suspending the airplane by two 12-ft-long cables as shown. The airplane is rotated through a small angle about the vertical through G and then released. Knowing that the observed period of oscillation is 3.3 s, determine the centroidal radius of gyration .

Fig. P19.68