Page 239 - Ship Construction.DJ Eyres 6Ed

Ch20-H8070.fm Page 228 Wednesday, October 18, 2006 6:59 AM
228 Ship Construction

Chain locker

Wash bulkhead
Bulkhead stiffeners
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Panting stringers
Panting beams

Plate stem Collision bulkhead
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Stem bar

Floors

FIGURE 20.2 Fore end structure

plates will be in excess of that required for the side shell forward, but the
thickness may taper to that of the side shell at the stem head.

Bulbous Bows

Vessels operating at higher speeds, and those with high block coefficients,
are often found to have a bulbous or protruding bow below the waterline.
The arguments for and against fitting some form of bulbous bow are the
province of text-books on naval architecture, but it may be indicated that
like most peculiarities of the immersed hull form this feature is usually
intended to reduce the vessel’s resistance to motion under certain conditions.
From the construction point of view the bulbous bow does not present
any great difficulty if this aspect has been considered when the bulb form
is designed. In general however a greater degree of plate curvature is