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Balance of power


Everyone wants to go electric but considerable limitations remain… particularly when you step into the world of high performance. However, by trying not to change the world in one go advances are being achieved – with a handful of performance-oriented boat builders leading the charge. Gunboat’s William Jelbert describes what has been going on during his particular watch


54 SEAHORSE


When designing a lightweight cruising catamaran we are faced with some tricky problems to solve: conventional propul- sion or hybrid, how much solar and hydro generation, how big to go on alternators and battery banks… and where do we anticipate the next jump in efficiency, size and weight savings? Then there’s the issue of how we accurately spec for power demands on a luxury, large performance catamaran, with all of the amenities, keep- ing weight-sensitivity and maintenance in mind, with the appropriate number of redundancies and amount of reliability… and decide that the system is ‘optimised’? Only a real understanding of the use-


cases can properly inform the conceptual design of truly optimised systems. For this


purpose our design team flew around the world meeting some of the most experi- enced Gunboat skippers onboard their boats. We have placed our team on all the models in the fleet during a regatta, gone cruising, joined in on yard talk during refits, and listened to successes and innova- tions as well as areas for improvement. The messages were clear: no internal combus- tion engines under berths; less is more; use the very best components; consider mainte- nance at every decision; and always with top performance and low weight in mind. So for the latest Gunboat 68 we made a


pivotal decision to put the engine room amidships; offering more internal floor area and centralising weight, which along with the flat hull rocker greatly reduces pitching,


GILLES MARTIN-RAGET


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