Marine propeller having a buoyant chamber

摘要

Marine propeller has a buoyant chamber attached to its aft end to reduce the bending moment on the shaft where it passes through the stern bearing. The buoyant chamber is a closed shell filled with closed-cell foam to prevent access of water in the case of damage to the sheel. To give maximum support to the shaft the buoyant chamber is of slightly tapering external form and truncated as its aft end.