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For submarines, the biggest bottleneck is the speed and endurance, which is limited by human reasons, because humans can't do without air, and the power system can't do without air, and underwater, air becomes the biggest problem. No matter how advanced the submarine's equipment is www.biquge.info, people and engines need air, which leads to the fact that the Yuan-class submarine has never been able to break through this bottleneck.

However, this bottleneck gave the imperial navy submarine designers new development ideas after the Chinese Empire's nuclear reactor test, especially after the first nuclear-powered ultimate battleship of the Chinese Empire, the Guanghua Emperor, was put into service, and the imperial submarine designers finally had a breakthrough design idea - the concept of nuclear-powered submarines was proposed.

As early as the mid-20s of the 20th century, the Imperial Chinese Navy became interested in the idea of a seer submarine in the science fiction novel "20,000 Leagues Under the Sea".

Beginning in the thirties, the Chinese Empire successively completed nuclear reactor tests and built the first nuclear power plant in human history at Daya Bay. At the end of the thirties, the Chinese Empire successfully put nuclear reactors on battleships, providing battleships with almost unlimited energy, and the appearance of the nuclear-powered ultimate battleship Guanghua the Great made the imperial submarine designers shine and found a way out for Yuan-class submarines.

In February of Guanghua 39, the Nuclear Physics Laboratory of Peiyang University completed the first small nuclear reactor in Dagu, which was smaller than the nuclear reactor on the battleship Guanghua the Great. ╔╗Only about a quarter, one-time fuel injection can support the power consumption demand of Song-class submarines at full speed of 50,000 kilometers. In this way, it provides the possibility for the Yuan-class submarine to achieve independent air propulsion.

Imperial Navy submarine designers soon began to conduct research and began to consider the use of nuclear reactors for submarine propulsion. But. To equip a nuclear reactor on a submarine, it is necessary to solve the following two problems: one is that the submarine has strict restrictions on the weight and size of the nuclear reactor. Moreover, the nuclear reactor must have sufficient power to allow the submarine equipped with the nuclear reactor to have the minimum required underwater speed. The second is that the submarine equipped with a nuclear reactor will be an underwater combat platform. In the event of a war it is possible to be hit by an underwater explosion at close range. Therefore, the submarine reactor and its shield must have sufficient impact resistance, otherwise the reactor on the submarine will be shut down or out of control, making the submarine unmaneuverable or causing a major accident.

Fortunately, the Imperial Navy already had the technology and experience to install nuclear reactors on the battleship Gwanghwa the Great, and it was possible to install a small nuclear reactor reduced to a quarter and install it on a submarine.

Soon, the Imperial Navy's General Administration of Ships, with the permission of the General Staff, immediately began design and development.

The first nuclear-powered submarine is still classified as the Yuan class, numbered after the -SSN-7XX (representing the Chinese Empire. SSN stands for nuclear-powered attack submarines, and 7xx stands for three-digit numbers starting with 7 for submarines of this class). The first nuclear submarine was named after the Nautilus from the novel "20,000 Leagues Under the Sea" under the designation - SSN-701. ╔╗

According to the design indicators of the General Administration of Ships of the Imperial Chinese Navy, the Nautilus nuclear submarine has a design displacement of 4,891 tons on the surface and 7,022 tons under the water, and its main dimensions are 105.5 meters x 9.5 meters x 7.6 meters. Twin-shaft twin-propeller propulsion, output power of 24,000 horsepower, design surface speed of 25 knots, underwater speed of 28.3 knots, armament of 533 mm bow torpedo tubes 6. There are 48 red-headed torpedoes, the design index of safe diving depth is 273 meters, the actual maximum diving depth reaches 408 meters, and the number of crew members is 105.

By the autumn of Guanghua's 40th year, Beiyang Heavy Industry had installed the requirements of the Nuclear Physics Laboratory of Peiyang University and the Imperial Admiralty to build two reactors, one of which was a land-based type reactor of the DKS2W-1 type, and the other was a DKS2W-2 reactor equipped on a submarine. The Type 1 land-based reactor is installed in a hull compartment of the same size as the reactor compartment of a nuclear submarine, and every component of the reactor is manufactured and installed in advance. After gaining sufficient experience in installation, commissioning, operation and maintenance, the Type 2 reactor on board the boat can be built and installed, which can reduce many mistakes and the amount of work involved in the design of nuclear submarines.

Of course, this kind of technology and experience is also taken from the experience of the Imperial Navy in installing a nuclear reactor on the Guanghua Emperor as a reference.

In February of the 41st year of Guanghua, the Beiyang Heavy Industry Electric Ship Branch in Zhili Prefecture signed a contract with the Submarine Committee of the Imperial Chinese Navy for the construction of the hull section of the reactor hull section for the DKS2W-1 land-based model reactor. ╔╗According to the requirements of the Imperial Admiralty, the first nuclear submarine of the Imperial Navy should be a military submarine with combat capability, and it cannot be designed and built as a submarine of an experimental nature, because the budget for the construction of nuclear submarines has been as high as 100 million dragon coins, and the eyes of the Imperial Congressmen are focused on the budget of the nuclear submarine, if the money is wasted, it is very likely to be directly stopped by the Congress, and it will be very difficult to restart the nuclear submarine program in the future.

In order to test the reliability of the main equipment on the first nuclear submarine in a war environment, Major Zhang Haiming, the chief designer of the submarine of the Imperial Navy, decided to install the main equipment that would be installed on the first nuclear submarine on an unmanned and decommissioned Squid (Tang-class) submarine, so that after diving in shallow waters, it would drop depth charges and launch torpedoes near the Squid submarine.

The Imperial Times jokingly called this test "fire squid" at that time, because the imperial side was highly secret about the nuclear submarine test, the people only knew that it was the imperial navy that used anti-submarine bombs and torpedoes to test the anti-sinking ability of the squid, and the squid was a retired submarine abandoned by the imperial navy.

After the results of this actual impact test came out. It was shown that the strength and shock resistance of the main equipment used on the first nuclear submarine was the ability to withstand the impact of an underwater explosion, and even its armor protection could directly block the impact of torpedoes fired by the enemy.

Then, the Imperial Navy put the air conditioning equipment, seawater oxygen generator, and air compression device to be equipped on the first nuclear submarine on the Squid submarine for a long time underwater aging test. ╔╗

The submarine Squid went on a continuous underwater voyage for up to 12 weeks without critical breakdowns. It proved that the operation of the air conditioning equipment, seawater oxygen production and air compression equipment to be installed on the first nuclear submarine is very stable.

In June of the 41st year of Guanghua, Wang Chenhao, the emperor of the Chinese Empire, officially ordered the construction of the first nuclear-powered submarine of the imperial navy. Then the first nuclear submarine of the Imperial Navy was officially named - SSN-701 Nautilus.

Soon. Military experts in Western European and American countries have speculated that this is the new first-class submarine of the Chinese Empire. And guessed that it was a Yuan-class submarine. However, on the issue of the numbering of the new submarine, the leaders were at a loss. Because they knew that only more than 200 Song-class submarines of the Chinese Empire were built, and the number did not exceed 300, but the number of the Nautilus reached 701, which caused controversy for a while. Some claim that the Chinese Empire actually secretly built five or six hundred Song-class submarines, while others see the difference, believing that the Nautilus's SSN has one more N than the previous SS, indicating that it is different from previous submarines.

Only the commander of the German submarine, Dönitz, guessed the key. He said that n probably means nuclear, and that it should be that the Imperial Chinese Navy is preparing to test nuclear power on submarines as well.

Dönitz's point of view has attracted widespread attention from the international community, and various experts have expressed their agreement with this point of view, but the Imperial Chinese Navy still only had four words "no comment" in response when asked by reporters. ╔╗

In August 41 of Guanghua, the Admiralty of the Chinese Empire signed a contract with the Beiyang Heavy Industry Electric Ship Branch for the construction of the "Nautilus" nuclear submarine. The construction of the "Nautilus" nuclear submarine officially began in Qinhuangdao in October of that year, and the Chinese Emperor Wang Chenhao personally visited Qinhuangdao and attended the groundbreaking ceremony of the "Nautilus" nuclear submarine.

The design of the "Nautilus" nuclear submarine is very different from that of conventional submarines such as the Song-class and Tang-class submarines in the past, and the bow pillar is rounded. The freeboard is low, the upper deck is straight, and the bow rudder has a retractable structure that folds up when not in use. The command station enclosure of the "Nautilus" nuclear submarine is located in the middle of the submarine near the bow. The stern of the Nautilus nuclear submarine is in the form of the stern structure of a conventionally powered submarine, and the stern rudder is located behind the propeller. However, the stern vertical rudder is divided into two parts, the upper and lower parts, and the stern horizontal rudder is arranged in a cross shape, with two propulsion shafts and two propellers.

The sonar equipped on the "Nautilus" nuclear submarine is the latest STDM series sonar array produced by Beiyang Science and Technology, and its detection capability is farther, wider and more accurate than the sonar array of the Song-class submarine, mainly thanks to the use of nuclear power supply, and the power is abundant. Similarly, the submarine is also equipped with an underwater radar system with a sonar array to detect targets, and is equipped with an advanced electronic display screen and a black-and-white image outline display device, so that the personnel inside the submarine can directly judge whether the target is offensive from the display screen without relying only on their ears.

At the same time, the Imperial Chinese Navy has equipped the "Nautilus" nuclear submarine with advanced radar and radio identification systems for friend or foe, so as to ensure that it will not hurt its own personnel during combat and greatly reduce the losses caused by its own miscalculation.

In addition, the pressure-resistant hull of the entire Nautilus nuclear submarine is divided into a total of 6 compartments, which are arranged in the order from bow to stern as follows: first compartment - torpedo compartment, second compartment - living compartment, third compartment - combat command cabin, fourth compartment - reactor compartment, fifth compartment - main engine compartment, and sixth compartment - stern compartment.

In addition to six 533-mm torpedo tubes, 18 spare red-headed torpedoes were loaded in the torpedo compartment, and the total load of torpedoes on board was 48 torpedoes. Its attack power is so powerful that submarines from all over the world cannot reach it.

The cabin is divided into three floors: the upper deck is the officers' cabin and the officers' conference room for 10 officers, the middle deck is the cooking room and the soldiers' crew dining room, and the lower floor is the battery compartment and the letter storehouse. The combat command cabin is also divided into three floors, the upper level is the periscope and the attack command room, and the rear of the attack command room is the radio communication room. The middle level is the control command room, where all the rudder maneuvers on the "Nautilus" nuclear submarine are concentrated, and the rear of the control command room is the soldier's crew living cabin. The lower floor is a variety of liquid tanks, battery rooms, pump rooms and warehouses.

Two DKS2W pressurized water reactors are arranged in the reactor compartment, one is a standing reactor and the other is a standby reactor. In addition, there are heat exchangers, pumps, and reactor water tanks. The entire reactor is protected by 300 mm thick Chinese special steel armor to ensure that enemy torpedoes and bombs will not cause the explosion and leakage of the nuclear reactor when sinking the Nautilus, ensuring the safety of submarine personnel. The roof of the reactor compartment is tightly sealed with a lead shield, which creates a shielded corridor at the top of the reactor compartment, which serves as a safe passage for the onboard personnel to move forward and backward.

There are 4 geared steam turbines in the main engine compartment, two of which are also standby, as well as various auxiliary engines, and the power plant console is also arranged in the main engine compartment, which is extremely thoughtful.

The two gear-driven steam turbines on the "Nautilus" nuclear submarine, driven by the saturated steam produced by the reactor, can emit a powerful power of 24,000 horsepower, and it is very stable, so that the maximum surface speed of the "Nautilus" nuclear submarine is 25 knots (25.2 knots when it is in service), the maximum underwater speed is 28.3 knots, and the actual speed is 28.55 knots during sea trials. Because the nuclear reactor provides a stable power output, the voltage of the submarine is very stable, so that the speed of the Nautilus nuclear submarine is quite stable.

Of course, the Nautilus, with a small nuclear reactor installed, has a range of up to 50,000 kilometers. Especially when diving underwater, a large number of air compression devices, seawater oxygen production and fresh water production devices are installed on the submarine, as well as a large number of oxygen tanks, freezers for food storage, and comfortable air conditioning devices, so that the submarine can last up to 120 days underwater, and the submariners above can live comfortably during this period. This is unmatched by any conventional submarine.

The aft compartment, located in the last part of the Nautilus, is the living compartment for the soldiers and crews. The basic number of crew members on board the "Nautilus" nuclear submarine is 93, and most of the crew members use two- or three-story beds. The three walls of each bed are made of light metal, forming a basically independent personal space, the beds are equipped with personal lighting fixtures, and each crew member has a special cabinet for personal belongings.

It can be said that the advent of the Chinese Empire's "Nautilus" as the world's first nuclear submarine has played a tremendous role in promoting the development of submarine technology all over the world, and has had a profound and far-reaching impact on the rapid upgrading of submarine technology, the development and change of submarine tactics, and the development of antisubmarine warfare tactics and technology.

However, the cost of the Nautilus nuclear submarine has also reached 92.5 million dragon dollars, which is dozens of times the cost of conventional submarines, although the Imperial Chinese Navy is very rich, but the Congress only approved the construction of the Nautilus in the short term, in fact, more tasks are used for experiments, for the Imperial Navy to develop better performance and lower cost nuclear submarines in the future.