Marine Design, 14-15 September 2011, Coventry University, UK
Figure 6 – Hull shape basics and deck design checkpoints a – concave sheerline; b – convex; c - straight; d – S-shaped; e, f – stepped sheerlines; g – classic transom; h – reverse
transom; i – cruiser stern; j – submerged transom; k, l – sterns of outboard and stendrive powered boats; m – swimming platform with lifting platform; n – curved bow; o – reverse bow; p – canoe bow; q – clipper bow; r – sloped bow, s – straight; t – pram bow
world. These types are very steady and even conservative when it comes to fishing vessels, workboats and specific local craft. Certain type trends are also evident among pleasure boats though this market is much globalized now. Studying traditional styles of boats and local operations is essential for
better understanding developing boating markets and new boating grounds.
For pleasure powerboats, an excellent general review of architectural types is presented by Sorensen in [6]. We tried to summarize some architectural types on fig.5 for powerboats and sailboats
over 6m in length; this
categorization is in no way all-inclusive but at least covers a major part of production craft
On one side, assigning a new design with an existing architectural type might seem to limit innovation and creativity. On other side, this approach allows proven solutions of known problems (including performance and safety
issues), matching expectations of customers
related to familiarity with these types, easy comparison to competitors and defining of market niches.
of 6.3 BASICS OF SMALL CRAFT ARCHITECTURE
Centuries of naval architecture have formed certain canons related to shapes and proportions of boat hulls [7, 8]. Types of bow shapes, stern shapes and sheerline shapes are presented on fig.6. Following the canons to some
extent guarantees seakeeping properties and
functionally features. Developing principally new shapes is possible but should be combined with analysis of operation and testing. For example, a reverse bow is getting popularity on small boats but besides fashionable aesthetics it can be hardly justified on most of small boats due to increased wetness, complications with anchor equipment installation, boarding, etc.
There is variety of cabin shapes on used on boats. Though it looks unusual for car stylists, reverse slope of wheelhouse windscreen (see fig.4c) (originating from commercial craft) is highly appreciated by boat operators as it provides absence of reflection and easy removal of water drops. Some considerations of deck architecture are presented on fig.6 for 9m trailrable powerboat.
©2012: The Royal Institution of Naval Architects
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