I learned a great deal about human ingenuity aboard the battleship. It was a technological marvel. First of all, how did they build that massive thing? How does something made out of steel float?
The reason a steel ship is able to float is because of Archimedes principle of buoyancy.
“Any object, totally or partially immersed in a fluid, is buoyed up by a force equal to the weight of the fluid displaced by the object.”
This goes back to the ancient Greek philosopher scientists Archimedes who is trying to solve the problem of whether the Kings crown was fake or real gold. Legend has it that he arrived at the solution while taking a bath. He noticed his bathtub else so much water and then when he entered the bath the water level rose. He began to realize that and objects by and see has to do with it’s the placement displacement not necessarily what it is made of.
So an object displaces in the water and amount of water equal to its weight (I’m not describing that right.) the deeper water is, the more pressure there is. This pressure is exerted on submerged objects. The pressure difference causes an upward force.
A bar of steel has a smaller volume than a steel bowl that has the exact same mass. The pole can float but the steel bar cannot. In object will float if the weight of the water that is displaced is heavier than the object doing the displacing. And object will sink if it’s mass is heavier than the water that it displaces. So that’s why the steel bar sinks and the steel ball will float. The bulls mass is spread out over a greater volume.
So even though a massive battleship is constructed of steel, the amount of water that it displaces is heavier than the ship itself. Basically the ship is a gigantic bowl. And the ship has watertight and compartments inside of it to ensure that if the ship is damaged water doesn’t come flooding into the barrel and begin to weigh more than the steel.
So maybe I have that backwards and object will float if the water that is displaced it was heavier than the no
In object will float if the water is lighter than the steel that the place is the water the object displaces the water. Once the water becomes heavier than the object in the object will sink. So flooding ship eventually will sink.
A ship that is flooding that is filling up with water will eventually sink because the weight of the water keeps increasing and to the point where the water is heavier than the object.
I last stab at it and object whose weight is less than the water the weight of the water that is displaced will float once the weight of the water becomes less than the weight of the object the water will sink so that’s what’s happening when a ships or raptors and flooding starts to happen in the compartments eventually if enough water gets inside the ship is displacing less water the weight of the wall
So that’s an interesting scientific principle.
Another interesting scientific principle is the steam engine.
The battleship was a conventional steam engine. They put water into big tanks they heated the water up in the broiler turning the water into steam. The steam with flow through pipes that were high-pressure pipes so steam wouldn’t leak out. And the steam would turn a steam turbines in the engine room. So the steam engine takes a pipe full of steam as it source of energy in the steam pushes through the turbines and makes the turbine turn the turbine is hooked to the shaft. The driveshaft runs through the ship and out the rear end of the ship the stern of the ship and turns the propellers. Or the screws The ship screws. The screws did the work of digging through the water and propelling the ship forward.
There is a physics lesson with our propeller works as well as the power turns through the water it creates a low pressure and a high-pressure. Similar to an airfoil that creates a lift to raise an airplane into the sky. The ships crew turns through the water and creates a differential and pressure and propels the full ship forward
As ship pass to do more than simply move through the water. Services are required. So also tied into the boiler steam making system or electrical generators. The generators would convert steam power into mechanical energy that turned large magnets. The magnets would induce a voltage into wires that powered the ship. So not only did the steam power of the ship but it also was used to create electricity. Another thing that the steam was used for was to heat salt water and condense it into freshwater remove the salt in a device known as an evaporator. The evaporator supplied fresh water to the ship for drinking for laundry for showers. Interestingly, it ships toilets in the head were filled with salt water. No sense in wasting freshwater for that purpose.
The ship has a interesting communication network as well. Our ship had sound powered telephones. These phones required no external electrical power to operate. The sound powered phones created the electricity to flow through I don’t remember the details of how that device works other than there were carbon nodules that vibrated with your voice and somehow created an electrical signal probably PCO electric like a crystal of some sort.
To keep the fires going in the bilge.
To keep the fires going in the broiler, required fuel oil. The fuel was pumped into the boiler burners using electrical pumps. When a ship is import, it uses sure services. So the electricity is generated from a source that is a sure. And the boilers are shut down and turned off. But when they are first laid off, the fuel pumps were supplied by shore power to make to keep the fuel going into the burners until enough steam had been created to make for the ship to make its own steam it’s on its own electrical power.
X in the movie battleship, which featured the USS Missouri fighting against aliens from another planet. Veteran sailors went aboard the museum ship in Pearl Harbor Hawaii and were able to get the ship underway within a matter of minutes or hours. In reality, when I ship like the Missouri was going to get underway, the boilers would be let off the day before the ship needed to power it’s way out of the harbor. I don’t know what the fastest time possible was for the Missouri to go from cold iron to self powered. But I know it was quite a number of hours.
Another interesting piece of technology on the ships where the sensors. Sensors are the eyes and ears of the ship. In the early days of dread knots and battleships, there weren’t a lot of sensors available.
Eventually radar was invented and a whole new world opened up. Before radar, ships relied on lookouts and telescopes and high-powered optics to see is farthest they could see. Radar allowed things to become visible over the horizon, in thick fog, etc.
A radar functions by generating a microwave. Similar to the microwave oven. There is a device called a magnetron that takes electrical power and converts it into an electromagnetic wave. I microwave. Usually these waves have different frequencies that they can operate out. It’s like a radio wave. The radar through an antenna sends a radio wave out. If a solid object is present some of those waves will hit it and bounce back in the same direction they came from. The radar will listen for these echoes these bounce back and the distance to the object can be calculated by the time it took for that wave pulse to make the round-trip. So the simplest forms of radar would send a small burst of energy out and wait a few moments for any echoes to return and then do it again.
Sonar is a technology that sends out a soundwave into the ocean and follows the same principle it listens for an echo a return signal that matches what was sent. And again they can measure the distance by getting the amount of time it took for the echo to return. The farther in object away is the longer it takes for the echo to return. Travel The speed at which these waves travel through the air or the water is a known quantity and the radar and sonar equipment simply measures that time to make the calculation of how far away an object is.