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America’s Cup- Competitive environment focused on performance- Large highly stressed structures in advanced composite materials- Closely monitored aerodynamic and hydrodynamic loads- Disciplined lifecycle monitoring of components

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Aeroelastic Design- Sailboat rig as a multi-element wing- Airflow imparts stresses- Stresses cause strains (deformation/elongation)- Strained shape changes flow characteristics- Actual performance depends on aero characteristics of deformed shape

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Pressure field visualisation

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Underwater- Keel and rudder generate forces equal and opposite to rig- Lift to drag ratio critical- Structural efficiency critical

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Hull / Fuselage- Localised loads applied by rig, control lines, and appendages- Global loads applied by water (hydrostatic)- Accelerations applied by waves- Hull shape design takes deformed shape into account to maximise performance

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When Things go WrongAccurate knowledge of loads and material behaviour permit correct safety margins

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Full Circle- Experience in competition radio controlled yachts is highly relevant to UAVs- Scale is similar, hence flow regimes are analogous- Composites allow intricate detail built into the part during additive manufacturing process

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Expanding the applications of advanced composites

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From vertical wings…

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…To flying boats

Advancing the state of the art and winning races through technological innovation

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Virtual model and assembly, Aeroelastic analysis, Digital fairing

Machined tooling

Lamination of part

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Cometa airframe for European launch customer. Now available from existing tooling

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Cometa airframe for surveying and surveillance, ready to fit out, supplied with box and multiple payload bays.2700mm wingspan, 90 minutes + endurance, highly customisable

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Upcoming family of airframes for a wide range of specialised missions

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