Steamships and their storyChatterton, E. Keble (Edward Keble)
History
Steamships and their story
Chatterton, E. Keble (Edward Keble)
Shipbuilding; Steamboats
_From a Photograph. By permission of the Norddeutscher Lloyd Co._]
[Illustration: THE “BERLIN” JUST BEFORE HER LAUNCH.
_From a Photograph. By permission of the Norddeutscher Lloyd Co._]
After the plates have been all fastened by rivets to the frames,
and the outside of the ship has been given a paint of conventional
salmon pink, the time approaches for her to be launched. During her
building the ship has been resting on the keel blocks where her centre
touches, but her bilges have been supported by blocks and shores. These
latter will be seen in the illustration of the _Mauretania_ already
considered. As the day for launching approaches, so also does the
anxiety of the builders increase, for at no time in her career is the
ship so seriously endangered. On the day of the launch the weight of
the vessel is gradually transferred from the stocks on which she has
been built, to the cradle, being lifted bodily from the keel-blocks
by means of an army of men driving wedges underneath her bottom. This
cradle is constructed on the launching ways, and the ship herself,
being now “cradle-borne,” is held in place only by a number of props
called “dog-shores.” At the right moment the signal is given for these
to be knocked aside, and at the first symptoms of the ship in her
cradle showing an inclination to glide, the bottle of wine is broken
against her bows by the lady entrusted with so pleasant an honour.
With a deep roar the ship goes down the ways, and as soon as the
vessel becomes waterborne the cradle floats. The ship herself is taken
in charge by a tug, whilst numerous small boats collect the various
pieces of timber which are scattered over the surface of the water.
Two or three days before the launch, the cradle which has been fitted
temporarily in place, is taken away and smeared with Russian tallow
and soft soap. The ways themselves are covered with this preparation
after they have been well scraped clean. In case, however, the ship
should fail to start at the critical moment after the dog-shores have
been removed, it is usual now to have a hydraulic starting ram (worked
by a hand-pump) under the forefoot of the ship. This will give a push
sufficiently powerful to start the great creature down her short,
perilous journey into the world of water which is to be her future
abiding-place.
Public-domain text, read in full here on John Shaqi.
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