A brief introduction to Chinese weapons(Mainly bombs, missiles, and other unobtrusive weapons)

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The first is the Chinese laser guided bomb
 

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The development of laser-guided bombs was first put into use by the United States during the Vietnam War. It was mainly used to attack high-value targets that were tightly protected by air defense firepower. The most concentrated manifestation of its combat effectiveness was the use of guided bombs to destroy the Thanh Hoa Bridge in one fell swoop.

China began to study its own laser-guided bombs in the late 1970s. With the maturity of technology and the development of equipment, laser-guided bombs have now become one of the main equipment of China's aviation precision-guided weapons.
The first generation of laser-guided bombs in China was Type 7712, which was developed in 1977. The overall structure of China’s 7712 laser-guided bomb is similar to the plans of other countries in the same era. It is designed and structured to imitate the "Paveway" I-guided bomb of the United States. The method of installing a weather vane type seeker. A control part and aerodynamic rudder surface for attitude adjustment are installed in the nacelle in the front of the low-resistance projectile. When the movement track of the projectile deviates from the target, the seeker calculates the speed by measuring the deviation of the reflected laser. For the deflection angle on the vector, the control system forms a control signal according to the deviation value and direction to restore the direction of the speed vector and the target. The foldable stabilizer control improves the adaptability of the carrier while increasing the bomb delivery envelope range.
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According to relevant data, the 7712 laser-guided bomb seeker has a laser capture distance of not less than 4 kilometers, a terminal guidance distance of not less than 3 kilometers, a capture field of view of 25 degrees, a laser system wavelength of 1.064 microns, and a horizontal delivery height. It is 900-7000 meters when it is launched, 1000-6000 meters when it is launched in a subduction, 100-1000 meters when it is launched upwards, and the projectile speed is 700-1200 kilometers for 7 hours, and the guidance accuracy (ground illuminating a fixed target) is 5 meters The bomb has a length of 3.68 meters, a diameter of 0.377 meters, and a weight of 490 kilograms.

The development of the 7712 laser-guided bomb has gone through two stages: the development of the principle prototype and the development of the engineering prototype. The wind tunnel blowing test of the wind vane, the full bomb blowing test, the program-controlled bomb airdrop test, the seeker sea surface stretch test, and the guidance A number of large-scale tests such as the head-up flight test and the airdrop target test. In 1985, the 7712 laser-guided bomb conducted its first target test. Q- 5 dropped two engineering samples and irradiated the target on the ground. Once it succeeded, the bomb successfully captured the laser signal in the air, and the seeker and control mechanism followed. Corresponding actions were taken to achieve laser guidance, but the hit accuracy failed to meet the predetermined requirements.
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Due to the weak domestic economy and technology at that time, coupled with the reduction of national defense funding, into the 1990s, my country's North Industries Corporation used the name LT-1 to promote the 7712 laser-guided bomb to the international market, looking for international partners to jointly improve this Type laser-guided bomb, but failed to find the user, and related work ended without a problem. Therefore, the development of the 7712 laser-guided bomb was finally shelved, and it was not possible to design a finalized equipment unit. However, through the development of this type of laser-guided bomb, our scientific and technical personnel have mastered the principles and technology of laser-guided bombs and gained certain engineering experience. Laid the foundation for the development of a new generation of laser-guided bombs in the future
 

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China's second-generation LT-2 laser guided bomb

The LT-2 began to be developed in 1997. After the design was finalized in October 2004, large-scale service equipment began. Almost all the new-generation fighters of the Chinese Air Force can use LT-2 guided bombs. After modification, it also has the ability to use LT-2. LT-2 and KAB-500L are very close in appearance and structure of the bomb, but analysis of data shows that the LT-2 uses a 500 kg bomb bomb from China. The LT-2 is both in the size of the projectile diameter and the weight of the bomb. It is smaller than KAB-500L. Although the structure and function of the LT-2 seeker are similar to those of the 7712 seeker, the LT-2 seeker’s weathercock sensitivity and seeker accuracy are significantly higher than those of the 7712, and the proportional steering gear controlled by the tail can be reduced. It is technically difficult to ensure the stability and maneuverability of the projectile. LT-2 seeker 1.064μm working wavelength and 4km capture distance are equivalent to 7712, seeker field of view angle of 25 degrees and weathercock rotation angle of 20 degrees are also not much different from 7712, the biggest improvement compared to 7712 It is the improvement of seeker performance and the improvement of hit accuracy. The success of LT-2 can be regarded as the result of referencing and borrowing from KAB-500L on the basis of domestic technology.
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GB25 laser guided bomb
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The GB25 25kg laser/GPS guided bomb is a low-cost, high-precision, and small collateral damage precision-guided bomb. The shape of the projectile is more like a small missile for drones. The center of the projectile is equipped with 4 trapezoidal wings and 4 trapezoidal rudders at the tail, forming a large lift-to-drag ratio aerodynamic shape design, using GPS/INS+ laser terminal guidance The system has a large off-axis angle attack capability against ground/surface moving targets, and even has two attack modes, a single attack and a coordinated attack. It has strong all-weather capability, and the interface can be modified according to the requirements of the aircraft. Due to the greater explosive power Small, suitable for precision strike with low collateral damage. The ammunition is 1.3 meters long, 0.13 meters in diameter, 0.34 meters wide and 30 kilograms in weight. It has a range of 25 kilometers for fighter jets, 15 kilometers for drones, 3 kilograms of TNT for high-explosive warheads, and a hit accuracy of CEP<3m. .
 

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What needs to be explained is the Divide of laser-guided bombs. The first-generation laser-guided seeker is a weathercock-shaped seeker. Under the action of the airflow, the seeker is deflected downward to aim at the target and adopts velocity tracking guidance. Law control, the guidance system lacks a stable system, the field of view is limited, the accuracy is low, and it does not have the ability to strike low-speed moving targets. The representative is the Russian KAB500L laser-guided bomb.
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The second-generation laser-guided bomb adopts a gyroscopic stabilization system and a proportional guidance law, with higher delivery accuracy and the ability to attack low-speed moving targets. The representative ones are the GB-250 and GB-500 laser-guided bombs.
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The third-generation laser-guided bomb adopts a seeker with scanning, preset and automatic tracking functions, a digital data processing system, and a large off-axis angle launch capability. This laser-guided bomb usually adds GPS/INS guidance and Extended-range gliding missile wings, etc., which constitute the fourth generation of laser-guided bombs, such as GB-1000 and GB-100 laser-guided bombs. Generally, when using laser-guided bombs, it is generally necessary to mount an optoelectronic/laser-guided pod.
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GB50 laser guided bomb

The GB50 laser guided bomb is simply an enlarged version of the GB25, so both the guidance method and the appearance are very similar. The projectile is 1.6 meters long, 0.13 meters in diameter, 0.42 meters in width, and 50 kilograms in weight. It has a range of 25 kilometers for fighter jets, 15 kilometers for drones, 10 kilograms of TNT for high-explosive warheads, and a hit accuracy of CEP<3m.
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GB100 laser guided bomb

The GB-100 bomb is technically a fourth-generation laser-guided bomb, and its appearance is a bit similar to that of the US laser-guided bomb. The missile uses a laser semi-active + inertial/satellite conductor system, and its large seeker window uses a gyro-stabilized large field of view scanning array laser seeker. It should be known that laser guidance is very accurate and low in price. It is indeed suitable for guided bombs, but its attenuation in the atmosphere is too severe. If the distance exceeds a certain range or is covered by rain, snow, or smoke, the bombs often cannot find the north. NS. However, the semi-active laser + INS/Beidou/GPS composite conductor system used by GB100 has much stronger anti-jamming ability. After launching, it can unfold the folded wings to glide and extend the range, use INS/Beidou guidance to fly to the target during the whole process, and use laser at the end. The semi-active seeker improves accuracy. The GB100 can strike a 30-kilometer target with an error of no more than 3 meters, and it also has the ability to strike at a large off-axis angle. The ammunition is 2.35 meters long, 0.23 meters in diameter, 0.95 meters in width and 130 kilograms in weight. It has a range of 30 kilometers for fighter jets, 15 kilometers for drones, and 44 kilograms of TNT for high-explosive warheads. The bomb has been equipped with Air Force JH7A fighter-bomber.
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GB250/250A laser guided bomb

The basic type of GB250 precision guided bomb is guided by laser + GPS/INS. Its characteristic is that the seeker has an extension section, it uses a duck layout, and adopts the proportional seeker of the second generation technology, which has strong anti-interference ability. With a wide field of view, it can strike ground targets moving at a speed of less than 30 kilometers per hour on the same axis as the bomb. It can attack multiple targets at the same time, and its all-weather capability is strong. The ammunition is 3 meters in length, 0.3 meters in diameter, 0.68 meters in width and 270 kilograms in weight. The fighter jet has a range of 20 kilometers and 90 kilograms of TNT explosives. The strike accuracy CEP<3 m when GPS/INS+laser guidance is used, and the CEP<15 m when only GPS/INS is used. The GB250A satellite gliding guided bomb is equipped with a back-wing component and only uses GPS/INS guidance. It has the ability to accurately strike outside the defense zone and has a maximum range of up to 80 kilometers. Strike accuracy CEP<15 m.
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GB500 laser guided bomb

The second-generation laser-guided bomb,
The shape of the GB500 laser-guided bomb is inherited from the Russian KAB500L laser-guided bomb. The shape is short and thick. It adopts a large field of view fixed scanning array seeker and proportional guidance method. Points and hard targets moving at low speeds (target speeds less than 30 km/h) mainly attack large and medium targets, while attacking small targets at the same time. The projectile has a length of 3.5m, a projectile diameter of 0.38m, a wingspan of 550mm, a total weight of 580kg, a launch height of 500m-1000m, a hit accuracy of less than 5m, a range of 8 kilometers, and 280kg TNT.
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GB1000 laser guided bomb

The fourth-generation laser-guided bomb,
GB1000 is a 1t laser semi-active + inertial/satellite dual-mode conductor bomb, which can be configured with 3 different types of warheads: penetration warhead, deep penetration warhead and blasting warhead, with high precision , Large range, easy maintenance, low cost and other outstanding features, can be used to attack large reinforced ground targets, such as underground command centers, reinforced hangars, large bridges, warehouses, transportation hubs and ports. According to different warheads, the projectile has different sizes. The wingspan is 1.659 meters, the length is 4.150, 4.148, and 4.750 meters, the projectile diameter is 0.377, 0.315, 0.457 meters, the maximum range is 25 kilometers, and the launch height is 4000 meters. -15000 meters, strike accuracy CEP<3m, warhead charges ranging from 210 kg PBX to 420 kg.

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