The question of submarines, why are submarines and submarines different?

No, there were no submarines at that time, and manual work should have been no more than ten meters.

It is said that there were no electric lights at the time.

In general, there are no conventional submarines capable of diving deeper than 300 meters, at least not yet. I don't know if we will be able to develop a conventional submarine with a depth of more than 300 meters in the future.

If we want to say that they can dive deeper, only nuclear submarines, and modern warfare nuclear submarines can generally work and fight in deep water areas of about 400 500 meters or at most 600 meters. The 30-ton submarine of the USS Sea Cliff was lowered to a depth of 6,000 meters in March 1985. In addition, the American Triest-2 three-seater boat and the Alvin have both dived to a depth of 3,650 meters.

Trieste-2 reached a depth of 10,919 meters in the Mariana Trench in the Pacific Ocean on January 23, 1960. In addition to the United States, the Soviet Union's nuclear submarine "Komsomolskaya" set a world record for a combat submarine diving 1,000 meters during its tests. The No. 685 design plan nuclear submarine set a record for diving 1,250 meters.

On February 28, 1989, the "Komsomolskaya" began its last combat voyage, and on April 7, it sank due to **, and 42 of the 64 crew members were killed.

It can't be done, because there is no such thing as a 20,000-mile-deep ocean.

The largest ocean trench in the world is the Maria Trench in the Pacific Ocean, at 11,034 meters, the deepest point on Earth, and can now dive anywhere in the ocean.

The Nautilus(Also called.)NautilusAnd today's submarines have 3 differencesFirst, the two work on different principles:

1. The operating principle of the Nautilus: The Nautilus rises and descends in the water, using two longitudinal inclined boards, which are mounted on both sides of the ship.

2. The operating principle of submarines: There are many types of submarines, with different shapes, ranging from small civilian diving detectors that are fully automatic or operated by one or two people and have an operation time of several hours, to Russian Typhoon-class nuclear submarines that can carry hundreds of people and continue to dive for 3-6 months.

Second, the appearance of the two is different:

1. The shape of the Nautilus: The Nautilus is a long cylindrical shape, with conical ends like a cigar.

From beginning to end, it is exactly seventy meters, and its cross beam, at its widest point, is eight meters. It was one-tenth as wide as it was, it was long enough from end to end, and its two waists were quite rounded at the bottom, so that the water could easily drain away while the boat was moving, and it would not hinder its navigation in the slightest.

2. The shape of the submarine: large submarines are mostly cylindrical, and a vertical structure (bridge) is usually set up in the middle of the ship, which is called the command tower in the early days, and there are communications, sensors, and periscopes.

and control equipment, etc. Today's deep-sea submarines or specialized submarines are often no longer designed to do so.

Third, the design of the two is different:

1. The design of the Nautilus: The Nautilus's hull is made of steel plates, and the ratio of the density of steel to the density of seawater is ten to seven to eight. The first hull was at least five centimeters thick and weighed 394.96 tons.

The second inner shell, the keel, was fifty centimeters high and twenty-five centimeters wide, and weighed only sixty-two tons. The weight of the machinery, the ship engine, the various ancillary implements and fixtures, the various wall panels and timber inside, and the three hundred and ninety-four .96 tons on them, together with the three hundred and ninety-six tons, are a total weight of 1,492.13 tons.

2. Design of submarines: R&D requires a high degree of and comprehensive industrial capacity, and only a few countries are currently able to design and produce them on their own. In particular, ballistic missile nuclear submarines.

It's a nuclear trinity.

The key pole. Submarines were also early stealth vehicles. The noise of a submarine can be "drowned" in the background noise of the vast ocean when it is reduced to about 90 decibels, which is not a contemporary sonar.

can be detected.

Dive. The boat is referred to as diving. A boat is a ship that is capable of operating underwater.

Hidden. There are many types of boats and different shapes, ranging from small civilian submersible probes that are fully automatic or operated by one or two people and operate for several hours, to Russian Typhoon-class nuclear submarines that can carry hundreds of people and continue to dive for 3-6 months. According to the volume, it can be divided into large (mainly military.

with), medium or small (pocket dive. boats, submersibles) and underwater automatic mechanical devices, etc.

In water, any object is affected by gravity and buoyancy. If the gravitational force is less than the buoyant force, the object will float on the water; If the gravitational force is greater than the buoyant force, the object sinks into the water. When gravity and buoyancy are equal or small, the object can "levitate" in a certain position in the water.

The submarine is to change the difference between gravity and buoyancy to achieve the function of navigating on the surface of the water and sinking to the depths of the ocean.

When the volume of an object is constant, the buoyancy it experiences in the water is a fixed value. Since the shape of the submarine is constant, it can only dive and float by changing its gravity. When designing the submarine, scientists made two shells for it, inside and outside.

In the gap between the inner shell and the outer shell, several water tanks are separated, called ballast water tanks. Each tank is equipped with an inlet valve and a drain valve. As long as the inlet valve is opened and the water enters the ballast water tank, the weight of the submarine will increase.

When the weight is greater than the buoyancy experienced by the submarine, the submarine will gradually sink. As long as the weight of the submarine is controlled, it can be suspended at any depth in the water. When the submarine needs to float, first close the inlet valve, open the drain valve, and then use high-pressure air to discharge the seawater in the ballast water tank, so that the submarine's gravity is less than the buoyancy, and it will surface.