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Sternthruster
Installation
One
of the two, KaMeWa thrusters as they arrived from Sweden.
Cascade General has now installed six thrusters in cruise
ships in the last three years.
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Sternthruster
Installation
The
complete stern thruster with tunnel extensions fabricated
by Cascade General. These were assembled from 26,000 lbs
of flat, Lloyds-approved 1" steel plate. Each extension
consists of two welded, conic sections; cut and rolled on-site
in the company's welding shop.
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Sternthruster
Installation
View
from above of the rigging crew hoisting the 5.5-ton bowthruster
into its aperture in the stern. Note the flared mouth of
the tunnel to reduce turbulence.
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Sternthruster
Installation
Rigging
crew maneuvering the curved sternthruster into its aperture.
Note port propeller shaft at left of picture, and extension
cut to match the shape of the Patriot's stern shell.
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Sternthruster
Installation
Sternthruster
installation with all welding complete and ready for painting.
Note plywood insert in tunnel to protect propeller and hub
from blasting and overspray.
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Sternthruster
Installation
Sterntruster
installation after coating, showing protruding lower lip,
designed to direct prop wash away from hull and prevent
water flow from "re-cycling" under keel. Note that the tunnel
is angled down 20 degrees to direct water flow under propeller
shaft housings visible at left.
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480-volt
power supply and control cables in overhead raceways leading
from engine room to sternthruster compartment, installed
by Cascade General's electricians.
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Electrician
testing the 480/6,600-volt transformer for the bowthruster.
(Voltage step-up required because of the distance from the
Patriot's generator to the bow)
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One
of three, new control boards for the thrusters on the bridge.
The existing thrusters were also integrated into this system.
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Bowthruster
Installation
Removing
the circular cut-out from the bulbous bow of the Patriot
using a cutting torch mounted on a rotating arm. Note original
750 KW bowthruster at left.
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Bowthruster
Installation
Highly
flared mouth of thruster tunnel hoisted into place separately
after thruster unit is in position.
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Bowthruster
Installation
The
1510 KW electric motor which powers the bowthruster was
lowered onto its foundation on Deck 2 after reinforcement
was added to framing on Deck 1.
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Bowthruster
Installation
Cascade
General welders working on the exterior of the bowthruster
tunnel.
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Removing
the C.P. propellers from their hubs for inspection and polishing.
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Surveying
the Patriot's starboard propeller shaft on the floor of
Drydock 4.
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