RUDDER OR KEEL FOR A WIND AND/OR POWER PROPELLED VESSEL

摘要

A rudder or keel for a wind and/or power propelled vessel, the keel or rudder having at its rear part mounted thereon at least one extension blade which is adapted, from the hull of the vessel, to be rearwardly extended from or retracted to a position wherein its rear edge substantially does not project rearwardly of the trailing edge of the keel or rudder. This will enhance the maneuverability and rudder movement, or increase the required keel lift by reducing leeway and/or improving the trim.