Improved twin rudder arrangement

Abstract

There is provided a twin rudder arrangement 300 for a craft (250, Fig 3). The twin rudder arrangement comprises a first rudder blade 310 and a second rudder blade 320, wherein the first rudder blade and the second rudder blade are configured to be provided at either side of a propeller 200 of the craft. At least part of the first rudder blade or the second rudder blade comprises a vortex generator arrangement 400, wherein the vortex generator arrangement is arranged to induce vortices in fluid flow passing / interacting with the twin rudder arrangement. Also provided is an aircraft or watercraft comprising at least one twin rudder arrangement. Figure 4