Current research areas in naval design and hydrodynamics are pushing the size of experimental models to larger scales to reduce scale effects and due to the increased size of the concepts. These larger models require special test design considerations for testing in existing facilities. Indoor/outdoor use models can be carefully designed for testing in both environments and to ensure sufficient powering. Articulated models introduce additional degrees-of-freedom, that require installation configurations using pitch and heave mounts (grasshoppers) to compensate. Large models encounter higher forces that require either more robust tow posts and/or grasshoppers to alleviate the encountered hydrodynamic forces and follow wave impacts.

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