The Dynamics of spinning bodies at large angle of attack /

A theoretical study was conducted to determine the motion of nonstabilized rolling and spinning bodies at very large angles of attack. From numerical integration of the non-linear sixdegrees-of-freedom equations of motion it was found that a rolling cone-cylinder body could achieve a self-sustained spinning motion for large ranges of both center-of-gravity position and Reynolds number. The stability of the autorotative motion was investigated using linear theory. For configurations representative of current small missiles descent velocities as low as approximately 100 ft/sec were achieved with spinning motion. Stable spins could be initiated from small angle of attack either by supplying a pitch impulse or effecting aerodynamic destabilization.AD0275437. (From http://www.dtic.mil)."January 1962."Includes bibliographical references (page 141).A theoretical study was conducted to determine the motion of nonstabilized rolling and spinning bodies at very large angles of attack. From numerical integration of the non-linear sixdegrees-of-freedom equations of motion it was found that a rolling cone-cylinder body could achieve a self-sustained spinning motion for large ranges of both center-of-gravity position and Reynolds number. The stability of the autorotative motion was investigated using linear theory. For configurations representative of current small missiles descent velocities as low as approximately 100 ft/sec were achieved with spinning motion. Stable spins could be initiated from small angle of attack either by supplying a pitch impulse or effecting aerodynamic destabilization.Air Force Contract No.Mode of access: Internet