Naval Architecture and Marine Solutions were commissioned to review the performance of an existing prototype trimaran and provide design solutions to improve the performance and dynamic stability.
When trialed in its original configuration, the multihull achieved only 10 knots, and rolled significantly in turns. Whilst NMS reviewed the static stability and found it to be satisfactory, the motions of the trimaran did not instill confidence in those on board.
Naval Architecture and Marine Solutions designed new ama’s that considerably increased the transverse waterplane inertia and thus stability. The additional buoyancy inherent in the design bodily rose the multihull 200mm, which improved the efficiency of the Hamilton waterjet propulsion unit.
During initial trials the trimaran achieved 22 knots maximum and cruised comfortably at 20 knots.