Ship Simulator
English forum => Small talk => Topic started by: firestar12 on March 07, 2009, 02:42:04
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Hey, I was wondering, what is the purpose of a bulbous bow? I don't see how it benefits the ship at all. Maybe it is just me. ???
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The shape of the bulb greatly improves the flow of the water around the bow, thus decreasing drag, which means more speed, and less fuel needed, which also means greater ranges.. and it also gives more stability.
* Edit: typo
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* Edit: typo
Is that humanly possible?
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The simple answer= Reduces drag
A bulbous bow changes and reduces the bow wave that is pushed by a ship as it moves through the water. The result is less drag which increases speed and fuel efficiency. A ship with a bulbous burns up to 15 percent less fuel that it would without one.
Fred was a wee bit faster than me and he is correct. ;D
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Interesting, thanks guys. ;D
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Is that humanly possible?
Only if it's on purpose, which it is, so that I don't blow my cover..
No problem, Firestar!
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Only if it's on purpose, which it is, so that I don't blow my cover..
No problem, Firestar!
I seem to recall you saying in a PM
Cyborgs don't need to
So are you the good kind or bad kind? ;D
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:evil:
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Noooooo Terry has taken over Fred :lol: :evil:
Jack.
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The Bulbous bow is actually a bad thing for low speeds. It only really comes affective when the ship is travelling fast.
http://en.wikipedia.org/wiki/Bulbous_bow
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The prime reason for the bulb is the reduction of costs. Fuel is a significant cost for a vessel.
You have to consider that the sole purpose for the vessel to exist is to make money for the owner. If the vessel goes faster, it makes more money Each shipload of cargo earns money. If more shiploads can be transported in a year, the owner makes more money.
But increased speed takes more fuel. That means more cost and less profit. A bulbous bow helps to reduce the fuel consumption (if some other factor had the same or better effect, that would be used, no doubt). That increases the profits. As most of a ship's travels will be on the open seas, the chracteristics at low speed are far less important to the ship's owner.
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I wonder, while the bb is there anyway: do they put anything inside it (like sonar maybe..) ?
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what is the/a bulbous bow? ??? ??? ???
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I don't think that freightships have sonar like a submarine.
The thing closest to a sonar is the depth meter.
But, on some navy ships, there is a sonar in the bulbous bow.
Another use of a bulbous bow is to brake trough ice.
what is the/a bulbous bow? ??? ??? ???
Google is your friend!!
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what is the/a bulbous bow? ??? ??? ???
A bow with a bulb. Like the Pride of Rotterdam, Ocean Star, Vermaas and more.
(http://upload.wikimedia.org/wikipedia/en/d/d5/SolitaireBulbousBow.jpg)
(http://upload.wikimedia.org/wikipedia/commons/0/0d/Zadm_drydock.jpg)
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ohhhhh now i know thank you firestar!
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ohhhhh now i know thank you firestar!
No problem CC!
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A form of sonar can be used for depth measurement, another for speed over ground..
It seems like the perfect place to put such instruments..
Also I doubt a bulbous bow would be suited for an icebreaker.. ;)
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I wonder, while the bb is there anyway: do they put anything inside it (like sonar maybe..) ?
Sometimes, yes. For instance: The bulbs on R/V Melville and R/V Knorr had observation ports, and the access trunk could be sealed by a hatch like that on a sub. This allowed the space to be pressurized so that the bow 'ducers could be replaced without dry-docking.
Unlike most ships that usually operate echo sounders near shallow water, research vessels do continuous precision depth recording while underway.
They also tow a magnetometer and a long hydrophone array. They may also tow an airgun for sub-bottom profiling. This can lead to a panic—or a mess—if the ship has to back down suddenly.
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Also I doubt a bulbous bow would be suited for an icebreaker.. ;)
Well, offcourse a bulbous bow isn't suited for a icebreaker.
But, cargo ships use to break trough ice.
A ship with a bulbous bow goes better trough ice then a ship with a normal bow.
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A form of sonar can be used for depth measurement, another for speed over ground..
I thought ships went over water? :angel:
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Yes, they do. ;D
But speed over water and speed over ground are different.
For example, you are sailing up a river, but you have 2 knots tide against you.
Your speed over water is for example 10 knots.
But, biceaus of the tide, your speed over ground will be 8 knots.
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I was joking...
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I was joking...
But that round yellow figure at the end of your post seemed to have a serious expression.