Steam-ships : $b The story of their development to the present dayFletcher, R. A.
History
Steam-ships : $b The story of their development to the present day
Fletcher, R. A.
Shipbuilding; Steamboats
Length 790 feet.
Breadth 88 „
Depth (moulded) 60 „
Gross tonnage 32,500 tons.
Displacement tonnage 45,000 „
Load draught 37 ft. 6 ins.
Height of funnels 155 feet.
Diameter of funnels 24 „
Height of masts 216 „
“Figures, however, convey but a bare idea of the great size. A
favourite standard of comparison in shipping is the leviathan of
Brunel, the _Great Eastern_, the mammoth steamer, which, born before
its time, yet solved in her construction many of the most difficult
problems with which the modern builders of big ships have to grapple;
yet the _Mauretania_ quite dwarfs the gigantic _Great Eastern_, as the
following figures show:
_Great Eastern._ _Mauretania._
Length 692 feet. 790 feet.
Breadth 80 „ 88 „
Displacement 27,000 tons. 45,000 tons.
Paddle, screw, and sail. Quadruple screws.
Speed 13 to 14 knots. 25 knots.
“The _Great Eastern_ was an experiment, but there is nothing of the
experiment about the _Mauretania_ and her sister, the Clyde-built
ship _Lusitania_. The valuable data obtained from the running of
the 20,000-ton turbine Cunarder _Carmania_ has afforded a valuable
object-lesson in adapting the turbine method of propulsion to liners of
the leviathan class, demonstrating the suitability of the steam turbine
to the largest type of vessel.
“The _Mauretania_ is propelled by turbine engines of about 70,000
indicated horse-power, driving four shafts, each of which is fitted
with one three-bladed propeller of manganese bronze. The outermost
shafts are each connected with a high-pressure turbine, the inner
shafts being rotated by the low-pressure turbines.
“The boilers and turbine engines of the _Mauretania_ were
constructed by the Wallsend Slipway and Engineering Company, Ltd.,
of Wallsend-on-Tyne. There are twenty-three double-ended and two
single-ended boilers, and one hundred and ninety-two large furnaces.
The boiler plates are the largest yet made. The steam is conducted from
the boilers into the turbines, of which there are four.” The turbines
contain about 3,000,000 blades, rotating four shafts, the united length
of which is close upon 1000 feet with a weight of about 250 tons,
each shaft carrying 17,000 or 18,000 indicated horse-power. Under the
covenant with the Government made at the time she was arranged to be
built, she is fitted for an armament of 12 six-inch guns. Her rudder
and both sets of steering-gear are below the water-line, and in the way
of the engine and boiler rooms there are side bunkers which, filled
with coal, are equivalent to an armour-belt round the vulnerable
portion of the ship.
Public-domain text, read in full here on John Shaqi.
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