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For prototypes and for first hulls of new series, CRN weighs its composite yachts at different stages of construction.
by Justin Ratcliffe
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11/01/2005
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For prototypes and for first hulls of new series, CRN weighs
its composite yachts at different stages of construction. The hull and main deck
are weighed on arrival at the CRN yard from Resin Sistem in Fano before work is
started on the interior. The superstructure and other fiberglass components are
weighed separately. This first weighing provides early confirmation of
lamination calculations.
Measurement is by sensors placed under the line of the keel and
laterally along the hull, using hydraulic pistons to lift the yacht. Each sensor
communicates its measurements in real time to a computer. The benefits of
monitoring the weight during the build are that, before completion, the position
of the longitudinal center of gravity may be verified, and the final trim and
waterline may be determined accurately. Halfway through the fitting-out of the
interior and before moving it for launch, the vessel is weighed again.
A similar process is implemented for CRN’s heavier, steel hulls (the Custom
Line 128 displaces 210 tons; a steel vessel of such length would exceed 430
tons). Equipment, furniture and fittings are also monitored during installation,
to ensure conformity with weight predictions.
 In Xs of Expectation
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