Hey guys
Physics as you know is the basics of how everything works and how everything moves. Navy battleship are no exception to physics. It is up to engineers to make sure they put enough power into these ship so they are quick and manoeuvrable. When these engineers start to calculate the power needed to move these gigantic ships they first need to know how much the ship will weigh. The weight of a Navy Ship weight changes constantly as fuel gets consumed, planes fly on and off the flight deck, people arrive/leave, and so many other variables make it hard to estimate how much the ship will weigh. The Navy's group of engineers use different weight loads to catagorize the different loads of the ship. For example light displacement is just the weight of the ship, talking when the ship leaves the ship yard empty. Loaded disparagement includes the crew, cargo, fresh water, salt water. stores, and any other item necessary for the voyage. Also, when you are talking about moving the ship anther factor is the current of the water. Is it going against the boat or flowing with the boat. This best engineers do these calculations constantly on a ship so they make sure the engines do not burn out and cause a stop to the the voyage. I just wanted to show how force of physics can be used in a real life application.
If you where an engineer for the Navy, how would you calculate the force needed to move a ship.
I have a question. Was you rushing when you wrote this because I found small spelling and grammatical errors. Just wondering. Also, I wouldn't know where to begin to calculate the force needed to move a Navy ship. There are so many things to consider. My question for you though is would air pressure, the water density, and weather come into play when engineers calculate those things?
ReplyDeleteI think the way to calculate force needed to move a ship is by the amount of power given by the ship to continue its given desired speed.
ReplyDeleteAlkeiria I also believe you made some grammer errors on your post but on Wednesday night i will post a blog relating to this article that will help you better understand how to calculate the force needed to move a navy ship.
ReplyDeleteHeriberto
ReplyDeleteThe power is exactly what we are trying to find from the force, once we know the force needed, the engineers know how much power to give to the ship. The water density would defiantly change how much force it takes the move the ship, but in my opinion I think the current speed of the water will change a lot more then the density of the water.
There are many factors that go into calculating how much force is needed to move a ship. You will need to think about the total weight of the ship, the different densities of the water on how your ship will react. In essence you would need to calculate all the forces that act as drag to overcome these to move your ship.
ReplyDeleteTo Alkeiria: First, if you are going to bash someone on bad grammar PLEASE use correct grammar yourself.
ReplyDeleteI have a question, were you rushing when you wrote this? This is because I found small spelling and grammatical errors, just wondering. Also, I wouldn't know where to begin to calculate the force needed to move a Navy ship, there are so many things to consider. My question for you though would air pressure, the water density, and weather come into play when engineers calculate those things?
OMG, I was just playing and having fun. I did not think it would be a big deal. Wow!!! :)
ReplyDeletePhilip my question is a very general one. You mention that the engineers onboard are constantly making these calculations. What exactly are they working to determine and how are they doing it? That's to say what kinds of physics are they executing?
ReplyDelete-Rebekah Clayton
When the ship is cruising most of the calculations are done by computers now, but all of the calculations where un-putted by the engineers. The engineers do need to make quick decisions when something goes wrong. For example if one of the engines goes down, then the engineers need to calculate if the have enough power from the remaining engines to push the ship. They also need to fix the problem quickly.
ReplyDeleteI personally have no desire to become an engineer so I can only guess at what would be a way to calculate the force required to move a Naval ship. Knowing the advances in technology and your response to other posts, computers do a lot of what once was done by hand. So, just factoring in all of the variables necessary for a ship to not only be functional, but also battle ready is a job that should be done by more than one person. Even with that said, I'm still not sure exactly how I would calculate the force required to move a ship. This blog sparked my interest more so because I'm going to be a Surface Warfare Officer on a ship similar to the one described above.
ReplyDeleteAlkeiria i thought your comment was funny and i was making a joke to. Hope i didnt offend you.
ReplyDeleteAlso everybody check out my post it is related to this blog post.
Thanks Walter. The post was very helpful. I need a little help following it, but I will do that one on one.
ReplyDeleteI found this blog post to be very interesting. Its great to see the physics behind how they make ships. I was wondering what kind of research you did, maybe I could look into it myself.
ReplyDeleteIf I was doing the calculations for the ship, I would consider each of the factors that determin the weight. Making a estimates of how many people were coming onto and off of the ship each hour. As well as how many planes are landing on the ship and departing each hour. I would do this for as many factoras as i could and put this data in a computer, that way the computer can audjust the froce of the engines each hour based on my approximations. Also, for factors such as the current of the water and wind, I would make calculations based on how they change and how often.
ReplyDeleteThis is an interesting post, but my question is what would be the difference in displacement between an unloaded ship and a loaded ship?
ReplyDelete-Steven DiGiannurio
The question makes me think that you want a method to calculate the amount of force needed to move the ship from rest. I would first go about finding a coefficient of friction (if one can be applied to this problem) and using that to find out the amount of force needed to overcome the ship's weight at rest. Also, I understand how a change in current would affect the ship's speed enough to worry about the strain on its motors, but would a few planes or boats loading and unloading make that much of a difference? They are only a fraction of the mass of the ship and can't be that significant of a change to make the engineers worry about the engines.
ReplyDeleteAll your ideas sound very reasonable to me. I personally think that one of the most important factors in trying to calculate the force needed to move a ship would be the friction of water. As the resistance of the ship must exceed the friction of water, I would estimate the maximum force needed based on the worst sea condition.
ReplyDeleteThis post was really interesting. I've had the opportunity to be on a ship and it amazes me to see how everyone works together to get this war ship to where it needs to go. I'm wondering where you got this information? It seems like a never ending job since a lot of the changing factors mentioned are always changing.
ReplyDeleteThis is also very interesting to me. I too had a chance to be on a ship this summer and the thing that fascinated me the most was the amount of electricity the engines delivered over the entire ship. Would the amount of energy that the engines provide to the ship effect their power output?
ReplyDelete-Kyle
In order to calculate how much force is needed to move the ship you'd need to know the total displacement of the ship as well as the amount of drag that is being created by the ship. The force being generated by the ship's engines must be enough to overcome that drag in order to keep it moving.
ReplyDeleteThere are many factors that go into how fast a ship can go and how manueverable it is. I have heard that the longer the hull of the ship is than the quicker it can move through the water. This is probably why aircraft carriers are capable of a higher top speed than other ships. Other factors would include how much power that the engines have and perhaps the shape of the hull underneath the water.
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