Trans RINA, Vol 154, Part C2, Intl J Marine Design, Jul - Dec 2012
of its practical application, modular construction and quite
voluminous cabin. To add, due to high
superstructures most of power catamarans tend to look ample and boxy especially from stern quarters.
Vector analysis for base curves of boat’s profile is presented on fig.4a, based on method presented in [19] by Prof. Pavluchenko. This method is widely used in classic naval architecture and is suitable for elongated objects with highly fragmented exteriors, such as ships. With major slopes changing progressively at forward half (a feature of dynamics) and aft slopes with similar angles (reliability feeling gained through uniformity) the craft’s silhouette
possess forward-directed and purposeful
signature. Another method studied is focal point analysis (fig.4b) that seems more characteristic for industrial design and also styling of yachts. It can be seen that boat’s profile is ‘stretched’ between forward and aft focal points, and shift of top focal point aft provides the sense of motion when stationary.
from middle
Figure 6: Analysis of R1200 catamaran resistance Curves refer to sharp-shine and round bilge hull
shapes for minimum operational condition (MOC) and loaded condition displacement (LDC) with BCB=4.54m, where BCB – distance between hull
centrelines. Additional curves are provided for round- bilge shape at LDC condition for BCB=5m and BCB=3m
Bow shape of craft provides maximum space for front cockpit, with forepeak access hatches under settees. Visual volume of cabin is reduced by combination of glazing, textures and colours; carbon-textured inserts and logo split almost continuous glass. Shape of the mast is what we call ‘pyramid arch’ with adequate space and height for radar scanner and satellite TV dome. Stern area provides minimal obstruction with plenty of storage under deck and seats, attachments. Important
Figure 5: Exterior design and styling process
First hand sketch, 3D model in Rhino, renderings in Flamingo, final rendering in 3DMax
C-20
design stages: aft deck could be closed by tent with clears to protect from rain and gnat.
rod holders and downrigger item to think about at early
©2013: The Royal Institution of Naval Architects
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