What's the purpose of a third boat engine?

Question:
Well the first engine goes clockwise, and the second engine goes counter clockwise, so what does the third one do?

Answers:

what tigershark jet skis good or bad? do they break down alot?

There are many boats now with 3 engine applications. Larger outboard powered boats have 3 engines for more horsepower, equals more speed. There are many ferry boats less than 100' with 3 diesel engines. Again this is because a third engine is needed for power not available with 2 engines. Modern engines of the type we are talking about all rotate in the same direction. In the outboards or inboard/outboards the lower unit makes the propellers counter rotate. In diesel or even gasoline inboard applications the marine gear makes the propellers counter rotate. The two outboard engines are used for slow speed handling (ie around the dock) and in some instances there is not even a rudder for the center engine. In many larger vessels twin diesels handle low speed propulsion and a gas turbine is used for situations requiring great speed. This turbine is normally conected to the diesel engine marine gears so there are only two propellers.

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Volvo penta AQ 120 B question?

Either or. A third boat engine isn't used for maneuvering purposes, simply extra speed. if you have a boat trying to do 50 knots, and you need 750 hp, you wont be able to find two 375 hp outboards, so you use three 250 hp outboards.

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what is ballast?

chris is almost right. the 3rd engine CAN be used for handling purposes, especially in high winds. been there done that many times. the outside engines are opposite and it doesn't matter which direction the center one turns.

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How were tall ships moved into place next to a pier for mooring without motors?

SPEEEEEEEDDDDD

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need to sell my boat fast wat do i do???

More power! If you want maneuverability, the outboard engines turn inboard. The center engine doesn't matter, but usually standard right hand turn.

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how does a boat stay afloat?

When the other two get tired on the way out the 3rd one takes them all back in, since it was well rested.

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Prince Louis Schooner info?

With pleasure boats, the third engine is a method to burn 1/3 MORE fuel and to add more speed... funny, not 1/3 more speed but...

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