New 2nd class motor question

Going through the licensing process ? Have queries, comments, or do you need an answer to that obscure exam question ? This is the place to post.
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Swailfish
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New 2nd class motor question

Post by Swailfish »

I recently wrote the 2nd class motor exam and came accross one of the new questions.

"Describe a gas turbine powered water jet propulsion system. How is the
shaft speed of the turbine reduced to that required by the water jet
impeller? What are the advantages of this system over that of a
conventional propulsion system?"

Hope this helps out anybody prepping for their 2nds.
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Sébastien
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Post by Sébastien »

Thanks for the info Swailfish. Isn't it nice to see that Transport Canada is keeping up with the times? The best info I have found so far are on the websites for Rolls-Royce, Wartsila and Ultradynamics.
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JK
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Post by JK »

OK, where would you ever see a gas turbine with a water jet other then a warship? Who could afford to run it?
Must be the influence of all those DND Double Dippers in TC :roll:
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Sébastien
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Post by Sébastien »

Fast ferries JK. One notable example is the Victoria Clipper that runs catamarans from Washington State to Vancouver Island. Water jets are now being manufactured with powers in excess of 20 MW for civilan applications.
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JK
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Post by JK »

OK, never thought of them, mainly because of the fuel costs.
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ArkSeaJumper
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Post by ArkSeaJumper »

The fast ferry boys are sorry they bought the gas turbine now, the price of fuel.
Stena run a few catamarans, around 40 knot boat, with 4 gas turbines, in a Father and Son arrangement.

http://www.stenaline.com/stena_line/ste ... 13865.html

I heard a rumor they have sold one of them to the US Navy.
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