Classic Wooden Yachts in UK
To the builders of classic wooden sailing yachts, the
hulls are more than just a sleekly shaped vessel whose job it is to keep out the
water.
Wooden yachts,
and particularly wooden sailing yachts, have to withstand a range of loads and impacts, and builders and designers
have developed some remarkably complex structures to handle those loads.
T he hull and deck must
be strong enough to withstand loads from tons of water, and to cope with point loads, such as those that occur when
a yacht is propped up ashore, or hits an object as sea. Taken as a whole, the hull has to be stiff enough to resist
bending forces when supported between two waves, when hard aground on a rocky ledge, and from the pull of shrouds
and stays.
Finally, special reinforcing must be built
in to cope with loads such as those from the mast, which does its best to punch a hole through the bottom, and the
rudder, which seeks to tear a hole in stern.
The problem is complicated by the fact that
we expect classic wooden sailing yachts to be capable of withstanding these loads for years. The marine environment
is harsh, and accelerates corrosion and decay in most materials. Wooden yachts must be designed and built with an
extra factor of strength in order to cope with the inevitable deterioration that takes place over
time.
The Nature of Wood for Classic Wooden
Yachts
Yachts can be built out of almost anything,
but not all building materials for yachts are equally suited to the task. It is no accident that, historically,
most yachts have been built of wood, as it combines strength and resilience in a lightweight, easily worked form.
In many respects wood is the ideal yacht building material, due to its exceptional stiffness.
The stiffness of a material is largely what
determines how much it bends when under load. In general, if a material can resist bending or flexing, it will
prove amply strong in other respects, such as resisting tensile loads. Wood combines stiffness with light weight in
a way that makes it structurally more efficient, stiffer for its weight, than just about any other material,
including high tech laminates.
All wooden yachts benefit from wood's
remarkable structural properties, but traditionally constructed hulls can't take full advantage of the properties
of wood due in part to the difficulty in effectively fastening all the various pieces together. They also absorb
far more moisture than is ideal; many woods are two or even three times stronger when dry than they are when
saturated with moisture.
These drawbacks don't make traditional
construction a poor choice; they simply mean that such craft will be somewhat heavier than a laminated hull of the
same strength.
|