Marine Design, 3-4 September 2014, Coventry, UK 8. CONSTRUCTION AND TRIALS
process was closely monitored by the design team ensuring quality of
construction according to the drawings and specifications.
After launching, the yacht named ‘Heliotrope’ was tested extensively with all possible measurements made that give valuable information for fine tuning and operation (fig.10). During the trials, with twin 520HP Volvo Penta D9 ‘intermittent duty’ engines top speed was knocking 25kts lightship, with economical cruising is 8…10kts. In first
six months after launching the boat logged over
4,000 nautical miles and proved to be reliable and comfortable matching its purpose for offshore passages in tropics. The boat demonstrated smooth of ride and nice feature in South East Asia are availability of shallow moorings and protection of propellers from debris and fishing nets. H65 is wide and space on boat is amazing – during the launching party in marina there were 120 people on board at once, with 25 of them on the flybridge. The plan for 2014 is presentation of the yacht at major boat shows, including Singapore and Cannes.
9. SUCCESSIVE DEVELOPMENTS
Given the experience and the success of H65, the team of AMD was facing the task to develop family of catamaran designs with the breed of H65, for other types of users. New H48 powercat (fig.12) – budgetary solution for coastal cruising, with appealing practical/sporty exterior, reverse bows, completely glassed bridgedeck saloon and decorative carbon inserts in exterior mouldings. The experience shows that after investing in solar technology the customers would like to have it more exposed. Thus, placement of solar panels on front of flybridge coaming is one of the decorative features of new H48. The first catamaran is currently in construction; series production is planned.
Other projects included superyacht catamarans of 80’ and 105’ featured in [6], where the advantages of catamarans in multi-deck layouts and creating spacious interiors with housing style accommodations are used.
10. CONCLUSION
Catamarans have proved to be fast, comfortable and reliable crafts with plenty of operational advantages for yacht applications; development of pleasure craft on power catamaran platform is a perspective direction.
Figure 11: H65 after launching: aerial view showing solar panels, silhouette and close view in marina.
The H65 was construction in temporary moulds – the technique used for many custom boats. The moulds are designed in 3D resulting cutting files for frames and panels, cut out of plywood or MDF using laser cutting and puzzle-joined into the shape. The construction
© 2014: The Royal Institution of Naval Architects
The project of H65 luxury catamaran is a yacht of limited length but with facilities comparable to much longer monohull. Design techniques were developed jointly by design and engineering teams for dimensioning of the craft, combination of layout
features with structural
elements, for best comfort combined with performance and seakeeping during ocean passages.
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