On the Annular Damper for a Freely Precessing Gyroscope—II

A previous analysis of the annular damper was based on the hypothesis that the motion at any instant could be regarded as quasi-steady. This analysis is revised in the present paper by accounting for all accelerations. The decay times are found to be substantially greater (damping less) than those predicted in the previous analysis. A general result for the dissipation in the laminar boundary layer of a liquid oscillating over a rigid wall is developed.