How good was 'Age of Discovery' Ship Design?
No original plans of any ship from the Age of Discovery exist because
shipwrights did not use plans drawn on paper or parchment. The only
plans were in the master-shipwright's head, and the ships themselves
were built by eye.
or reconstructions of several Age of Discovery ships have been built
in recent times.They look fine and romantic, but few of them can sail
anything like as well as the original ships. There is clearly something
wrong with the way we understand the design of these ships.
From the outset, one of the stated objectives of the Duyfken
Replica Project has been to produce a reconstruction that sails well
enough to emulate the achievements of the original Duyfken.
Research to reconstruct the design of Duyfken, a Dutch jacht
built at the end of the 16th-century and used for exploratory voyages,
drew on five major types of data.
- Contemporary artwork showing sailing ships (the "iconography").
- Ship builders' contracts specifying the sizes and types of
timbers used in ships' construction.
- The remains of contemporary Dutch ships discovered by archaeology.
- Log books and other documents revealing the performance of
- Computer modelling of ship performance and stability.
first objective in the Foundation's research was to learn to draw ships
with the right external style and appearance. Foundation researchers
compiled an extensive catalogue of reproductions of Dutch marine art
from the time of Duyfken and used mathematical and statistical
analysis to describe and find typical forms and ratios of proportions.
This goes by the rather grand name of "Morphometric Analysis of the
Although this analysis was aimed primarily at learning the style rather
than the technical design of the ships, we began to notice that some
proportions shown in the iconography consistently indicated a hull-form
very different from ships of half-a-century later.
the absence of any plans for a ship of this period there have been a
number of theoretical (on paper) reconstructions designed by using the
relatively narrow and box-like hull-form of the late 17th-century, whence
plans are available, and combining this with the high-stern and large
billowing sails of the 16th-century galleon. The results could be disastrous
if tried at full-size.
Following clues in the iconography, we began tentatively to move towards
a design with more beam, and with longer and sharper bow and stern;
but without questioning the shallow boxy cross-sectional shape. At each
phase, reports on the research were sent to experts in the Netherlands
for comments and criticism. A very positive response came in the form
of confidential information about the on-going under-sea investigation
of a circa 1590 shipwreck in Dutch waters which showed very strongly
the long and relatively sharp bow and stern that we had tentatively
reconstructed. Furthermore it provided evidence for an unexpectedly
sharp cross-section shape (hollow garboards). Other evidence has supported
this interpretation. It is the solid evidence of archaeology that lets
us see what other evidence was hinting.
design, a broad-beamed but sleek design, has been tested by computer
modelling (using the Western Australian developed Maxsurf program) and
the results are encouraging, showing a design with good stability and
able to maintain good average speeds even in light conditions, in keeping
with the historical evidence.
Now the replica Duyfken has proven the research a success.
The Duyfken Foundation has a design that sails well, reinforcing
archival research which shows shows that the original ship was exceptional
- often out-sailing much larger ships, and maneuverable enough to be
taken close to unexplored lee-shores even during the stormy and dangerous