Sesto for building a gondolin.
principal system used in boat design in the Venetian
boatyards is the sesto, a full-scale template that,
by rotating and moving guided by the marks on its surface,
allow for the direct creation of all the frames.
technical drawings showing the classic longitudinal,
transverse and plan views exist, they are used only for
advantages of this template system are evident: full-scale
drawings are made directly without having to enlarge them
at the lofting stage; the sesto can be positioned
on the block of rough wood for a more rational use of the
material; one or more parameters of the boat can be
changed by varying the scale of the marks; families of similar curves
can be generated while avoiding possible
irregularities in the form of the hull, etc.
system, albeit with many variations, is so rational and
practical that it is still used in most of the traditional
boatyards around the world.
disadvantages are the lack of visualization of the
completed boat and the impossibility of calculating
volumes, stability, etc. However, neither of these were
required by the boatbuilders who knew the
appearance and characteristics that the finished boat