"Eisboch" wrote in message
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"Calif Bill" wrote in message
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"Eisboch" wrote in message
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"Short Wave Sportfishing" wrote in message
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On Mon, 8 Oct 2007 19:49:19 -0400, "Eisboch"
wrote:



The Navigator has two rudders. (Last time I checked)

This may sound like a really stupid question, but I honestly don't
know the answer.

Is it easier to manuever a boat with twin engines with two rudders?
What would be the difference if it had one rudder? Or if you have a
single engine and two rudders?

I am not sure I understand your question, but a single engined boat like
the
GB has one rudder, a twin engined boat like the Navigator has two
rudders.

On a power boat, the rudder is placed directly behind the prop(s) and
it's
purpose is to direct the prop wash to move the stern and provide
steerage.
It's not the same as a sailboat that would have a much bigger rudder and
depends on the movement of the boat to steer, rather than the prop wash.

Eisboch

But you already knew that.


Not all. the Titanic had 3 screws and one rudder. Was a major reason
that it crashed after the short warning of the iceberg ahead. They tried
to stop the ship and when the engines went to reverse, there was no
steerage. Small rudder and no real flow over it.


Huh?

Eisboch


You said twins have 2 rudders. The titanic was a triple and they had only 1
rudder. When the iceberg was sighted they turned and then tried to reverse.
The ship only turned enough to miss the exposed part of the iceberg and 300'
of the ship was opened underwater. If they had kept it in forward, then
they would have turned enough to miss the berg completely. Small rudder and
the main prop in front of the rudder was stopped. Little turning moment.