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In the figure below measured longitudinal velocities at z=1.00m are presented. Each line represents a constant x-coordinate for multiple measurements of different y-coordinates. You can observe, that the velocity drops significantly towards the edges in lateral direction. Good sailing conditions are mainly in the range of -5m to 5m in lateral direction. Deviations in longitudinal direction are present, but less pronounced.

The Optimist

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Bodies Conventions

The Optimist assembly consists of three bodies denoted as hull, boom and ballast. These bodies are linked together by means of constraints. The largest and heaviest body is the hull which accommodates all actuators. The boom is connected to the hull by means of a hinge joint. The ballast can shift in lateral direction by means of a prismatic joint between the hull and the ballast body.