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1250-TON
DANISH FERRO-CONCRETE MOTOR . SHIP.
Similar
Vessel to the 1000-ton Concrete Barges Being Built in this Country.
Our illustrations
are reproduced from the scale drawings of a motor installation in a ferro-concrete
ship being built near Copenhagen. This vessel is of the usual cargo ship design,
with a deadweight capacity of 1250 tons, or nearly 55 per cent of her
displacement of 2300 tons, her length between perpendiculars being 196 ft.,
while her breadth is 3.; ft., and the draught 16 ft. She is being built to the
rules and under supervision of the Norwegian
Veritas.
About 150
tons of steel reinforcement have been embodied in the hull, which is of the
single-bottom type.
As will be seen from the illustrations the vessel
is
fitted with a single screw which
is
driven by a
Diesel engine, the latter being'of particular interest from the fact that the
makers-the Frichs Engineering
`Yorks,
of
Aarhus-have
only
recently taken up the construction of marine engines, although they have been
turning out stationary Diesel engines of the
Brons
type for several years.
The engine in the vessel being described is of the four-stroke type with six
cylinders, having a bore of 11.2 ins. and a stroke of
19.6 ins., 400
b.h.p. being developed at 190
r.p.xn. The Frichs marine Diesel engine is of the enclosed type with
crossheads, while the camshaft is carried along the upper part of the crankcase.
Driven off the fore end of the crankshaft is a three-stage air
tompresser
and
an, oil pump, bilge and cooling-water pumps being also direct driven. An
auxiliary Diesel engine of the same make with three cylinders, and developing 35
b.h.p., operates
an
air
tompresser
and a
ballast pump. Mounted by the main engine are two fuel oil tanks, each holding
enough for a four hours run, oil being pumped into them from the main tanks. The
propeller hås
four blades and is 7
ft. in
diameter, whilst the intermediate shaft is fitted with a ball thrust bearing.
Oil filters are provided for both the fuel and the lubricating -oil.
A small funnel is provided to accommodate the exhaust silencer and for purposes
of ventilation, while the exhaust manifolds from each set of three cylinders
are water-jacketed. The deck machinery of this vessel includes three motor
winches.
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