Clockwise from top left: a reconfigured vang-strop wraps around the front of the mast post below the foredeck ensuring the front of the sail is always fully sealed to the false deck fairing (removed for clarity); fore and aft beam section shapes have all been refined to encourage attached flow – note the seamless simplicity of this aft beam/wing-deck connection; the attention to aerodynamic detail throughout the new boat is surely unmatched in any other small boat class… the shrouds are attached to these internal chainplates using a part-threaded titanium rod that runs inside a sealed tube down the leading edge of the forward beam. From this angle (below) the effects of the aero and engineering refinements become starkly apparent. To reduce aero drag plan form area is also reduced, the forward beam moved aft 65mm while the outboard end of the aft beam is now 80mm further forward. The outboard end of the aft beam is also 20mm lower. Every effort was made to remove all bumps, lumps and fittings that protruded from the deck, beams and wings: hiking strap mounts are integral mouldings, the outer hiking beam is now incorporated into the wing deck, the control lines are seen only between the cleat plate and outboard wing edge. An effort was also made to give the user as much room as possible, the upper deck surface the sailor passes over has been lowered by 25mm and the usable deck pushed out as wide as possible. The upper wing deck is also now scooped out to allow sailors to hook into hiking straps faster but with the straps kept as low as possible


All the major structures in the boat are


built using high-temperature cured carbon pre-preg while David’s attention to detail on this project has been truly impressive – even for an America’s Cup nerd like me. Nearly every part that is glued or


screwed to the boat was custom designed and manufactured by Mackay Boats – leveraging their expertise in detail design and their familiarity with CNC machining, 3D printing in metal and plastic, tooling and composite construction in general. In fact, literally the only off-the-shelf


parts on the new BM-V3 Moth are the sheaves inside the custom deck turning blocks. The new boat has been sea-trialling for


a few weeks in New Zealand and everyone has been smiling. The Moth continues to be good therapy (and not just for me). Paul Bieker, Seattle


q 40 SEAHORSE


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