“"-5 Intercontinental Ballistic Missile "-"-5 Intercontinental Ballistic Missile ", the first generation of strategic ICBM developed by China, was developed in 1965, first tested in 1971, and after the successful flight test on May 18,1980, it began to serve in 1981.
After the “Dongfeng-5 service, China began to draw on the latest technology of intercontinental missiles from abroad, and developed" Dongfeng "-5A and "Dongfeng "-5B missiles one after another.
The “easterly "-5B" missile is launched using a two-stage liquid fuel rocket engine and a fixed launch well. As a strategic missile, the performance parameters of the "Dongfeng "-5 series of missiles have not been disclosed, according to foreign military experts speculated that" Dongfeng "-5B full-length meters, bomb diameter meters, take-off weight of 183 tons, using a second-class liquid fuel rocket engine, the maximum range of 15000 km (" Dongfeng "-5 missile 12000 km), can carry a 3000 kg of power of 3-4 million tons of nuclear warhead, or TNT~4,6 sub-nuclear warhead (" Dongfeng-5B "), hit accuracy of 500-2000 meters.
The “easterly "-5B missile is designed to be a two-stage liquid ballistic missile with four engines in parallel and a single engine plus attitude control engine in the second stage. As an intercontinental missile,“ Dongfeng ”-5B uses a large number of advanced techniques and techniques, and the missile body of the missile changes from aluminum-magnesium alloy to better performance aluminum-copper alloy, which greatly reduces the structural weight. On the "Dongfeng "-5 missile, the first stage engine uses a large thrust YF-20 engine with a single thrust of up to 60 tons, and the second stage engine is a high altitude version of the YF-20, using a large nozzle to increase the thrust and significantly improve the specific thrust. while the “dongfeng ”-5a/b further improved the first and second stage engine and the development of the terminal repair active attitude control engine. some data showed that the second stage engine thrust increased by 23 000 ox. The "Dongfeng "-5B missile also uses new guidance and control technology, including high performance inertial air float gyro stabilization platform and digital projectile computer, combined with the new hydraulic servo system, so that the accuracy of the missile has been greatly improved.
Compared with \"Dongfeng \"-5 and\" Dongfeng \"-5A, the biggest improvement of \"Dongfeng \"-5B is the sub-lead multi-warhead technology. This point can also be seen from the change in the shape of the Dongfeng \"-5B missile fairing,\" the Dongfeng \"-5 missile fairing is a typical single-warhead conical fairing, and \"Dongfeng \"-5B is a round-hammer fairing with a blunt head. This kind of fairing can establish a space with constant temperature and humidity for the internal warhead, thus ensuring the storage environment requirement of the warhead. In addition, there is a parallel split mechanism above the \"Dongfeng \"-5B fairing, which allows the missile to begin to separate the fairing at the initial stage of the missile, which cannot only meet the needs of the\" Dongfeng \"-5B missile's early maneuvering rail transition, but also save the load space of the missile and maximize the carrying of more warheads or decoys.
According to the load of the missile, the \"east wind \"-5B can carry about 4 or 6 sub-missile warheads, which has reached the level of\" east wind \"-31AG new intercontinental missile, and is also in the leading position compared with the intercontinental missile of poplar M and militia III. The \"Dongfeng \"-5B sub-guided multi-warhead is placed in a mother chamber with a guidance device, which consists of a rectifier hood, a terminal booster engine, a guidance device and a release device. After the separation of the sub-warhead cabin and the projectile body, the final booster engine starts to work, and the attitude, speed and position of the cabin are precisely adjusted according to the prescribed procedure under the action of the guidance device, and then the release device starts to work. After each warhead is released, the final booster engine re-ignits, adjusts the speed vector, corrects the trajectory, and releases the next warhead until the warhead is released.
Through this technology, Dongfeng-5B can have the remarkable characteristic of attacking multiple targets with one missile, which greatly improves the efficiency of missile delivery. Furthermore, guided multi-warhead missiles only need to develop the number of warheads, without the need to increase the number of delivery vehicles and launch positions, that is, the maintenance of almost identical missiles can also multiply the strike capacity, which undoubtedly keeps the efficiency ratio of nuclear forces at a high level. More importantly, the orbits of the sub-guided multi-warheads are almost different and the number of warheads is high. When the sub-warhead is increased to a certain extent, the enemy's defense system can be \"saturated\" state, and cannot intercept or all intercept the incoming warhead. With the continuous development of missile defense technology, Dongfeng-5B will become its defenseless \"Xinjiang dream \", and the position of Dongfeng-5B in China's strategic strike force will be difficult to shake.
“One of the biggest differences between Dongfeng-5B and Dongfeng-41 is that there are no launchers on the vehicle and the missile is directly exposed. In addition, the warheads and projectiles of the missile are carried separately, so a" easterly "-5B needs two carriers to reflect intuitively the size of Dongfeng-5B. This difference is actually caused by different modes of launch," Dongfeng "-41 can carry out land-based motorized launches through launching vehicles, and "Dongfeng "-5B is fired in launching wells fixedly, in addition," Dongfeng "-31AG and" Dongfeng "-41 use solid fuel engines, while "Dongfeng "-5B is a liquid fuel, and the missile base and warhead base of its missile forces are normally deployed separately for concealment purposes.
Judging from the current launching trend of ballistic missiles, the solid-fuel ballistic missiles represented by \"Dongfeng \"-41 have acquired great advantages in survival and reaction ability because of their easy storage and simple small structure, so they are basically solid-fuel missiles in the new generation of ballistic missiles. And liquid missiles such as \"Dongfeng \"-5B need to be fueled before launching, the launch preparation time is longer, but also limit the mobile development and deployment of the missile, can only be fired in the fixed missile well, its defects are relatively obvious.
However, Dongfeng-5B also has its unique advantages, with its greater thrust and payload, and therefore its greater range and power, although its secondary strike capability is weaker than that of a mobile deployment, but its intercontinental range strike coverage and maneuverability are equally important for the reasonableness of a large country. And with the development of new materials, special fuel and computer technology to realize the optimal control of fuel, liquid missile has gradually overcome some inherent defects, as evidenced by the improvement of the performance of \"Dongfeng \"-5B, which is being developed in our country,\" Dongfeng \"-5B rear-order model\" Dongfeng \"5C, which can carry 10 sub-guide single heads at the same time. Therefore, for a considerable period of time,\" Dongfeng \"-5B will be used in conjunction with \"Dongfeng \"-41 missiles to build a new chapter in China's strategic strike force system.