Shipbuilding from its beginnings. Vol. 1 (of 3)Konijnenburg, E. van (Emile)
History
Shipbuilding from its beginnings. Vol. 1 (of 3)
Konijnenburg, E. van (Emile)
Shipbuilding -- History; Ships -- History
An engraving of a “lichter” of the XVIIth century, also bears this
distich:
[Sidenote: II 177]
“Te lichten menich schip bequaem”
“Daar af voert dit schip zijnen naem”.
(The name of this boat comes to it because it is able to raise many
another).
Later, larger “Lichters” were built, known as “Lichter” of Nigtevecht,
Brouwershaven, Wieringen, etc.
All have the same massive form raised a little forward and aft. A few
carry a “statie”. The waist of the boat is always straight. The larger
size involved the necessity of a rig, and the “Lichters” so rigged were
called “Kraken”, a name which has nothing in common with that of the
Spanish caracks.
[Sidenote: III 48]
An engraving which shows a ferry-boat running between Amsterdam and
Haarlem, gives an idea of the precursor of the “Kraak”. There must
also be counted among the “Kraken”, the “IJker”, with a smooth hull,
of which the more recent name undoubtedly designates the same kind of
vessel. It is well again to remark that the old “Turfijker” has nothing
to do with this “IJker”, with a smooth hull, which it resembles only in
name.
At Haarlem, the “Kraak” is called “Haarlemmerpont”. This vessel is a
little less bluff and the stern is less full.
The Netherlands, cut up by innumerable rivers and streams in every
direction, have been, from the most distant times, the country “par
excellence” of ferries and other vessels for carrying man and beast to
and fro.
THE “OVERHAALPONTJE” SKIFF.
[Sidenote: III 59]
[Sidenote: III 61]
The simplest form of these ferries is shown by the rectangular scow
made to run back and forth by hauling on one or two ropes. Boats
of this kind are very well known by the name of “Overhaalpontjes”
(skiffs), of which large numbers exist still in Holland, especially in
the neighborhoods of The Hague, Amsterdam and Utrecht.
THE PONTON.
The “Ponton” is another kind of ferry boat.
The larger sized craft are raised forward and aft to facilitate the
passage. The bow and stern, which are broad and flat, carry a movable
part called the “Koebrug” (cow bridge) to facilitate taking horses,
cattle and carts on board. These movable outside bridges are lowered
and raised by two balanced levers, one on each side. By bearing down
on them, the fore bridge is raised a little above the horizontal.
The lever is then made fast. After crossing the river, the bridge is
dropped and rests on the approach. The slope of the bridge must not be
too great, nor should the movable part be too long, otherwise it would
be unmanageable.
It follows from what precedes, that there exists, for a good approach,
a certain relation between the slope of the ramp, the length of the
movable bridge and the draught of the ferry-boat.
As a general rule and for ordinary pontoons, the most favorable slope
for the ramp is 1 in 8.
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