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Old 02-29-2012, 04:48 PM   #81
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RE: Costa Concordia

I believe you will find the Costa Allegra is powered by two pairs of medium speed diesels driving two conventional shafts through combining gearboxes.

Large marine engines are completely dependent on external electrical power. If power fails for any reason the engine will immediately stop. The emergency generator is no adequately sized to power all the auxiliary equipment needed to operate the main engine.

Generators are normally located in a separate area or generator room and a fire that knocks out one generator might easily disable the others and leave the ship dead in the water.
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Old 02-29-2012, 06:08 PM   #82
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RE: Costa Concordia

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RickB wrote:
I believe you will find the Costa Allegra is powered by two pairs of medium speed diesels driving two conventional shafts through combining gearboxes.

Won't dispute that.* My books on cruise ships show that while some of Costa's ships are diesel-electric, others are directly diesel-driven* or even* gas turbine.* The Allegra isn't mentioned: books obviously are*not current.
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