Alexander Segal

Roll-damping qualities of constructive stabilizers

The paper presents the description and results of a model experiment carried out for comparison of the roll-damping qualities of continuous bilge keels and of wing ledges, installed in a staggered order, during rolling of the ship at zero forward speed. The damping qualities of constructive stabilizers were investigated also at motion of the ship ahead. The obtained data can be useful in subsequent experiments and in design of new sea vessels.

Investigation of Short Wings Roll-Stabilizers

The paper presents a detailed analysis of experimental data, concerning decay roll oscillations of ship models, and the determination of an effectiveness of Short Wings Roll-Stabilizers (SWIRS) as compared with bilge keels and active anti-rolling fins. The influence of end plates on the wing lift force, the SWIRS drag and the reduction of roll amplitudes owing to the increase of damping moments produced by roll-stabilizers are also considered.