AN EXPERIMENTAL INVESTIGATION OF THE EFFECTS OF MAGH NUMBER, STABILIZER DIHEDRAL, AND FIN TORSIONAL STIFFNESS ONTHE TRANSONIC FLUTTER CHARACTERISTICS OF A TEE-TAIL

摘要

A transonic flutter investigation was made of elastically and dynamically scaled models of the tee-tail of a patrol bomber. It was found that removal of the 15° dihedral of the stabilizer used on the airplane raised the flutter boundary to higher dynamic pressures. The effect of Mach number on the flutter, boundary was different for dihedral angles of 0° and 15°. The dynamic pressure at the flutter boundary increased approximately linearly with the torsional stiffness of the fin. Highspeed motion pictures indicated that the flutter mode consisted primarily of fin bending and fin torsion.