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Spirit enjoys the sound of silence

Halyard''s brief from Spirit Yachts'' Managing Director, Sean McMillan, was to keep the 75ft yacht as quiet as possible. Halyard''s solution was a comprehensive system comprising of sound insulation, an exhaust system for the main engine and generator, and installing Aquadrive to reduce vibration – all of which will be on display at the PSP Southampton Boat Show, Stand F036.

Sean comments, “As a luxury, custom built yacht, reducing noise on this vessel and maximising passenger comfort was paramount. Due to our very high standards of build and design, Halyard''s noise reduction systems were the only ones we considered for this project and we are delighted with the results.”

Halyard tackled the issue of airborne noise - the noise inside the engine compartment - by fitting sound insulation materials on the bulkheads where noise would be an issue with the engine in the saloon.

Halyard tackled the issue of airborne noise - the noise inside the engine compartment - by fitting sound insulation materials on the bulkheads where noise would be an issue with the engine in the saloon.

The exhaust noise was addressed by the installation of a custom built lift silencer - designed for use with engines positioned on or below the waterline - and water separator, which helped reduce noise on deck by 50%, and means passengers can have a normal conversation whilst sailing.

The final piece of the noise reduction puzzle was confronting structure borne noise. This was achieved with the installation of Halyard''s Aquadrive system, an anti-vibration system. The Aquadrive system''s thrust bearing transmits the thrust to the hull instead of the engine, reducing wear and tear significantly and is virtually maintenance free.

At the yacht''s recent sea trial, the noise reading in the saloon was an impressive 67 dB with the engine running at idle speed.

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  • Halyard