Military of China, force comment.
Military of China, force comment.

X-47B unmanned aircraft carrier landing in the imagined map. U.S. F-117 stealth fighter Chinese HQ-9 type of ground launchers. (Data)

Guangzhou Daily

Recently, stealth aircraft, stealth tanks, stealth ships are repeated newspapers, full of the network, causing people to focus on stealth technology.

In fact, since ancient times, military strategists have been in the pursuit of one’s own way on the battlefield transparent, he is not striving to make friends. Ambush mountains, night raids, is to make the enemy can not see me; person title pieces, bell horse pick, is to make the enemy can not hear me. The modern battlefield, the national army is from visible light, acoustic, radar and other all-round performance of the pursuit of weapons of stealth, from the eyes and ears to lie against the radar, and more and more “paying attention” of the detection equipment to compete, to better to preserve their own, to more effectively combat each other. This paper tries to conduct an inventory of stealth technology.

stealth technology

from dream to reality

you can not see –

to fully bend light the “invisibility cloak”

1987, the Hollywood film “Predator,” a reflection of people’s stealth technology fanaticism. Movie, alien monster wearing camouflage coat, visible to the anti-reconnaissance, anti-infrared reconnaissance, anti-electronic reconnaissance, camouflage automatically adjust.

If the “stealth shirt” is the advanced camouflage, it seeks to achieve the disappearance of the enemy out of sight, hidden in the operational environment, then the camouflage combat clothing is the most we are familiar with the relative primary camouflage.

Recently, U.S. researchers create a kind of “invisibility cloak”, under the cloak of items can “disappear” without a trace! This cloak includes two new nanoscale materials, the silicon rectangle made of light forward only after the free flow in both directions. This makes invisibility cloak completely around the bend light waves occur, as if, like water over rocks. Tests showed that when the light changes direction, is completely hidden items can be achieved. However, it has many shortcomings need to be improved.

people can not only stealth, large equipment can also be invisible.

recently, the British company BAE Systems has developed an “electronic ink” that can make tanks “stealth.” They are installed on the tank body electronic sensors, these sensors will image the surrounding environment outside the body to reverse projection, their integration into the surrounding scenery, making it “instantly hide” to avoid attacks. And on the tank body image will follow the environmental change, always make sure the tanks in camouflage.

you hear –

noise smaller, acoustic sonar stealth shield can cheat

usually do not see the underwater objects detected by sonar. But now, some acoustic stealth technology allows you to hear.

the United States in 1985 and development of the “Sea Shadow” stealth ship, stealth technology demonstration of the Navy in the future feasibility of the application. “Sea Shadow” ship coated with radar absorbing coating, took control of underwater noise and measures infrared radiation.

submarine itself is a stealth weapon systems to enhance its concealment of the main measures to further reduce noise. Currently the main countries from hull shape, structure, power equipment selection, and other aspects damping silencer, vibration noise. Now, some nuclear submarines has been reduced to 120 db of noise below the equivalent of three sea conditions and ocean background noise.

but not enough, scientists hope to use underwater acoustic “stealth shield” fool sonar. Over the years, the theory that there may be sound to make an object turn around without reflection or absorption of the material. Recently, U.S. scientists have developed a Acoustics invisible housing in a particular space in the control of sound waves and bent or twisted, hidden underwater objects in this acoustic cover of the block, even with sonar and other types of ultrasound are not detected to. The researchers designed a cylindrical housing, by the 16 voice lines form concentric rings, can guide the direction of sound waves. Is actually the sound waves bend to the outer jacket around the invisible. This technology can cover a wide range of wavelengths, it will be a wide range of applications.

let you test vain –

use of new materials, new technology, hidden aircraft, missiles

The first application of stealth technology in modern aircraft, stealth aircraft, the fastest growing and most mature. Prominent representatives of the United States has developed several stealth aircraft.

F-117 is primarily taken shape invisible. Its shape is very strange, completely multi-faceted diamond cutting technology polygonal design, the whole body all the straight lines, so the radar can be shot to scatter in all directions. B-2 stealth bomber radar cross section of only 0.1 square meters, this is a “flying wing” shape and use a lot of carbon fiber composite materials and special absorbing coating results. From F-117 to F-22, the U.S. stealth technology is through a “Shape + Paint + Materials” in path. US-developed “Comanche” is the world’s first stealth helicopter a real stealth helicopter, the radar cross section is only 1% of other helicopters, is “Apache” and 1/400.

present, invisible coating has been widely used in aircraft, warships, tanks and other equipment, appearance, become anti-radar detection and prevention of leakage or electromagnetic interference and effective means.

which plasma stealth coatings in aircraft flight emit strong radiation, high-energy particle outer surface of the air vehicle to promote the formation of ionized plasma layer on the microwave, infrared radiation, have a good absorption.

enemy radar to detect electromagnetic radiation exposure to the plasma cloud around the aircraft after a major cause two phenomena: First, part of the electromagnetic energy is absorbed by the plasma cloud. Because electromagnetic waves through the plasma cloud in the plasma of charged particles with the interaction of its energy is greatly attenuated; Second, plasma clouds can produce diffraction of electromagnetic waves, electromagnetic waves around the plasma cloud, no reflection, which will greatly reduce the reflection of electromagnetic signals, so that the radar is difficult to find hidden in the plasma cloud in the aircraft.

infrared stealth coating nanoscale organic coatings, nano-fine powder can not only absorb radar waves, can absorb visible light, infrared, you can evade radar detection, but also the role of infrared stealth.

U.S. X-47B stealth

carrier-based unmanned maiden flight successfully

U.S. Grumman for the U.S. Navy developed the X-47B unmanned aircraft has successful first flight in California. The day of the flight test lasted 29 minutes or so, the aircraft climbed to its highest at more than 1,500 meters. From the field screen to see the plane shape with the famous B-2 stealth bombers are very similar.

Grumman said, X-47B will be equipped with the U.S. Navy’s first “no tail, unmanned jet aircraft.” It can carry precision-guided bombs from U.S. aircraft carrier off the completion of the task of attacking enemy targets, and then returned on their own aircraft carrier landing. U.S. military has allocated about $ 636 million machine, the entire production process is highly confidential.

X-47B fighters under the command of the computer completely off combat and return. Ground controllers as long as the computer input on the target machine and route information, all other work is completed to the computer. Previously, only experienced pilots flying the aircraft to complete the task on the landing.

Grumman said, X-47B aircraft design flying height of more than 10,000 meters, speed of up to 1,000 km. For some time, the aircraft will continue to Edwards Air Force Base in California to launch 50 test events.

informed sources, the current required for the development of new bombers, some of the key technologies, including advanced stealth technology, advanced integrated avionics, advanced propulsion technology have been five generations of the F-35 and other machines of the development process to development and validation. Many people claim that the U.S. military’s next generation of unmanned aircraft design should be taken to ensure that the U.S. military on the battlefield to achieve “zero casualty” target.

stealth fighter five “enemies”

1999 war in Kosovo, Federal Republic of Yugoslavia will be Czech production, “Tamara” radar, and Soviet-made SA Farm -3 surface to air missiles used in conjunction with the U.S. military shot down an F-117A, breaking the myth of invincibility stealth fighter.

enemies one: special radar

Czech Republic developed the “Tamara” passive radar system, not outside its own emission of electromagnetic waves, and stealth aircraft by capturing the electromagnetic signal to determine the hidden aircraft position. Stealth aircraft, airborne radar for as long as the open observation or communication, to escape the fate of being discovered.

to the incident direction of radar reflectivity to the other, not directly reflected back to the radar, stealth aircraft, which is the primary means to deal with one ground-based radar. But double-base or base radar, this move will fail. Current stealth aircraft designed primarily for the cm wave radar, and difficult for the millimeter wave radar stealth. In addition, because the surface is not completely smooth and stealth aircraft, there are a lot of butt cracks, these places can be strongly reflected millimeter wave, the millimeter-wave radar can not stealth.

predators II: SAM

surface to air missiles can be used to provide higher and adjacent units of stealth aircraft information, prepare well in advance of Stealth aircraft. Stealth aircraft in the bomb process, due to strong reflection of radar bomb doors open, its stealth capabilities will be temporarily reduced, surface-to seize this opportunity to their surprise, fast tracking, targeting and firing in order to “fast close combat Law “shot down stealth aircraft.

enemies three: anti-aircraft guns

modern anti-aircraft hit probability has reached a very high level, and has a strong resistance to electronic interference. Anti-aircraft operations, you can use the gun aiming radar, optical or infrared device lock stealth aircraft. In case of emergency, anti-aircraft guns fired in a short time but also a large number of projectiles, attacking enemy aircraft in the air en route to form a “firewall.”

predators IV: Fighter

stealth stealth aircraft mainly for ground air defense radar, the fuselage above the stealth ability is relatively poor. Stealth fighter aircraft than to fly high, you may find that long-range stealth aircraft and high speed to meet the enemy, close combat with missiles or cannon to shoot down.

predators five: directed energy weapons

the long term, high-power microwave weapons and laser weapons and other directed energy weapons, stealth aircraft is the “Terminator.”

laser beam energy laser weapons to directly attack and kill the target, wherever.

high-power microwave weapons, stealth aircraft can make a temporary malfunction of electronic equipment within or completely destroyed, but also destroy its invisibility. Current stealth aircraft is coated with radar absorbing microwave absorbing materials, as were high-power microwave irradiation, the energy absorbing material will absorb the excessive heat due to deformation, resulting in heavy stealth aircraft were destroyed, ranging from loss of operational capability .