First of all, the displacement of the meta-class submarine is basically the same as that of the Kilo-class, and it has a K-beam slightly protruding from the Kilo-class, and the protruding outline is more obvious, so it can be judged that the internal spatial structure and layout of the meta-class submarine are basically the same as that of the Kilo-class.
Secondly, the position and size of the podium have been adjusted. It turns out that the control tower of the Song-class submarine is too big, and the difference between the upper and lower resistance is too big when diving underwater. It seems that it is necessary to rely on the rudder to counteract the pitching moment, and at the same time, it will increase the resistance of submarine underwater diving. However, the proportion of the control tower shell of the new submarine is quite close to that of the Kilo class, which shows that the military designers in China have realized and made up for this defect. In this way, the technical expertise of Russian Kilo-class and domestic 039 Song-class submarines are integrated with each other, and their performance is definitely further improved, so they can be called "Super Song-class submarines".
There is also a school that believes that the meta-class submarine should belong to the improved Amur class in Russia. The Russian military is the initiator of this statement. Russian naval technical analysts generally believe that the design of meta-class submarines refers to the concept of Amur class. The outer contour of the meta-class adopts a drop-shaped design, which abandons the whale-shaped contour of the original 039-class submarine and inherits the simple shape of Kilo-class and Amur-class. By reading the position of elevator and tail rudder, it is also considered that the ship has been equipped with passive sonar system and towed sonar system. Moreover, through the proven technology of 039 submarine's silencing tile and sound-absorbing rubber layer, the meta-class submarine can continue to use without any problems, and may even use more advanced integral rubber covering technology. This noise reduction level may be close to that of Russian submarines. Therefore, Russians are happy to call China's submarine "China Amur" class.
Weapon system:
The British "Jane's Defense Weekly" claimed that as early as 2000, the Russian Innovator Design Bureau had transferred the 3M54 club submarine-launched missile technology to China, which could be launched from surface ships or Kilo 877EKM/636 diesel-electric submarines. Later, the imported Kilo-class submarines mastered advanced submarine-launched missiles and torpedoes, and these powerful "mass killing technologies" will undoubtedly be used on the meta-class submarines.
3M54E This system mainly launches 3M54E(E 1), 3M54E and 9 1RE 1(E2) for anti-ship missions, of which 3M54E 1 is equipped on small ships and submarines, and 91re1(. This missile system used for attacking the ground, the sea and the underwater can accurately maintain the flying height through the missile-borne flight control system; Terrain matching and satellite navigation system ensure that the missile has high hit accuracy and can greatly improve the submarine's attack capability.
Power system:
American media directly revealed that China will definitely upgrade the submarine's propulsion system, such as reducing the motor shaft speed from 500 rpm to 250 rpm, replacing the traditional twin-shaft or three-shaft propeller with a single-shaft propeller, and increasing the number of blades from 6 to 7. At the same time, the noise intensity of the submarine is greatly reduced by adopting measures such as double-layer elastic cushion seat and adding soft cushion to the engine. Because China has always had the tradition that "importing technology is not as good as buying technology", when China buys 877EKM and 636 Kilo class submarines from Russia, it is bound to digest and absorb the submarine's propulsion system. China has enough time to digest and improve the research and daily maintenance since the purchase. By using these mute measures, the noise of the meta-class submarine is greatly reduced, almost equivalent to that of the Kilo-class submarine nicknamed "black hole". Since the US Navy has only one active sonar that can capture the echo of Kilo-class submarines, it is not surprising to pay close attention to the noise index of meta-class submarines.
AIP system:
In order to pursue the maximum underwater voyage, the conventional submarine lost many talented designers and finally evolved a relatively perfect AlP system.
AIP system is an air-independent propulsion system. It first sprouted during World War II, and the Soviet Union and Germany began to study it almost at the same time. The Soviet Union uses liquid oxygen and diesel to drive closed-cycle engines, while Germany uses steam generated by high concentration hydrogen peroxide to drive turbines. These hard attempts have gained some valuable experience. Since World War II, through continuous efforts, this technology has gradually entered the practical stage, so that modern new conventional submarines are simply embarrassed to drive out without AIP system.
This time, for China's Yuan-class submarine, foreign media unanimously and unequivocally pointed out that China already has AlP technology, on the grounds that Pakistan, an ally of China, has obtained the AIP technology of Agosta 90B submarine from France. This AIP technology in France is called MESMA (Independent Submarine Energy Model) steam turbine system, which uses ethanol and liquid oxygen as energy to drive a turbine generator, and the power index of the system is 16PA4V 185VG. This technology can increase the submarine's underwater endurance by three to five times by lengthening a section of the hull. It can be conveniently loaded on many active submarines. Therefore, many experts' eyes are red with excitement.
Technical parameters of Kilo-class conventional submarines;
Discharge (including anechoic tile): floating: 2,350 tons, submarine: 3,076 tons.
Captain 73.8m wide and 9.9m draught (during normal drainage):16.6m.
Weapons and equipment: 6 533mm torpedo tubes, equipped with 18 torpedo.
Main engine: diesel/electric propulsion, 5900 horsepower, single-shaft six-blade low-noise propeller.
Maximum diving depth: 300 meters Working diving depth: 250 meters.
Speed: 17.5 knots.