Russia Su-75 | Science & Technology of Stealth Fighter Jet Design
not long ago at the 17th Dubai air show the United aircraft Corporation of Russia made a high-profile appearance with a new stealth fighter named General according to the Russian side this fighter is aimed at the international market the expected price for a single unit of this fifth generation Fighter for foreign trade is only $30 million us as soon as the news came out it immediately attracted widespread attention from countries around the world meanwhile the United States also brought out a full-size model of the F-35 fighter to actively sell to Gulf countries in response some media believe that the focus of the competition between the United States and Russia at this air show is on stealth Fighters which are the most advanced in the world so how strong is the multi-purpose combat capability of this joint attack fighter this episode of military technology will take you to unveil the mysterious veil of these ghosts in the air hello everyone welcome to watch military technology I am the host lanal before we dive in we need a small favor from you please take a moment to hit the Subscribe like and notification buttons below so you can stay updated on all our latest videos the Dubai air show as an international Air Show with a scale among the top in the world radiates the Middle East and African markets not long ago at the 17th Dubai air show Russia made a high-profile appearance with a new stealth fighter because the site of the aircraft is printed with the number 75 it is also called s75 by the media Sergey kov the president of the Russian National Technology Group stated that the Sous 75 is a fifth generation fighter and can be considered a competitor to the F35 so what are the highlights of the s75 that first appeared overseas let's find out together the Sous 75 is developed by the SEO design Bureau under the United aircraft manufacturing group of Russia it is a fifth generation Fighter for foreign trade this fighter adopts a single engine single seat design some media have calculated that the s 75 is about 17.66% M this size is much larger than the mig21 fighter it is close to the fa18c Hornet F35 lightning 2 fighter and belongs to the mediumsized fighter this so-called s75 in fact may not be its official military number because it is still in the research and development stage it has not been installed yet therefore its number is likely to be S7 5 that is to say the number in the field although the front is not written only a 75 is written so what is his nickname there are several ways there are generals that are now more commonly used there are also called stiff there are also called kills because I think the kill is a bit more domineering this one step will kill you regarding the naming of the Sue 75 seo's export name is Checkmate this Echoes the gimmick in the the early promotional materials but most of the media reports describe the general fighter Checkmate as a term in international chess whenever a move directly attacks the opponent the leader is called a general and the other party cannot get out of the siege the situation is called death Checkmate the official information that Checkmate wants to express means that there is no solution to kill listening to this name already has the spirit of a dog fight taking the enemy's first level so why did he start this nickname it must be aimed at his opponent so who is his main opponent it should be the F-35 of the United States the F-35 lightning 2 is a medium-sized stealth fighter and it is also a medium-sized stealth fighter from this point of view its main combat opponent is not F-22 but it should be the more equipped F-35 compared with the F35 fighter known as the fat power the Sous 75 has a more balanced and coordinated shape from the Su 75 that appeared at the Dubai air show this time its shape has obvious stealth the design adopts a diamond shaped Wing similar to the Sue 57 Fighter without a horizontal tail wing and two vertical tail wings with a larger outward tilt angle than the F-35 the inner side of the vertical tail has a flat cooling air intake the most unique design of the Sous 75 in appearance is its air intake which extends upward from the lower jaw air intake located under the cockpit to both sides of the aircraft snows the upper edge of the air intake and the light side of the fuselage form a narrower Edge strip which extends backward to the pseudonyms on both sides of the engine this unique air intake design is different from any jet fighter that has entered service in history there is a saying that the combat effectiveness of a fighter often directly correlates with its aesthetic appeal a good-look fighter generally also has strong combat capabilities however merely possessing High aesthetic appeal is not enough as a type of Airborne weapon platform a stealth fighter is Prim rily used to carry out combat missions the weapon configuration and payload on the fighter are key indicators that support its combat Effectiveness so how is the combat effectiveness of the Sous 75 from the perspective of the abdomen the lower edge of the Seuss 75's air intake extends backward forming a canoe shaped protrusion that is almost as long as the fuselage from front to back there are front landing gear Bay and a large main bombb Bay on both sides of the protrusion from The Edge to the pudm another level of steps is formed with side bomb bays and Main landing gear Bays each of the two narrow side bomb Bays can carry a close-range air toar missile this makes the Sous 75 the world's first medium-sized stealth fighter with side bomb bays in addition three medium- range air toar missiles or two large ground to ship ammunition can be mounted in the main bomb bay of the Sue 75 a phased array radar originating from the Sue 57 Fighter is equipped inside the fairing of the aircraft snows and there is a radiation Mark painted in an area on the leading and trailing edges of the wingtips indicating that high power radar equipment or antennas are installed inside for state city warning or electronic countermeasures according to Russian statements the maximum payload of the Sue 75 can reach 7.4 tons the air combat thrust ratio can reach more than 1.0 and the ferry range can reach more than 3,000 km overall whether it is the range payload or the thrust ratio data of the s75 they are all very impressive so where are these indicators impressive they are impressive in surpassing the F35 they completely surpass the F-35 uh during the design phase of the F35 there were several hurdles the result was that it delayed its research and development cycle it increased the cost in the end it did not completely solve the problem what problem one is that the resistance is too large and the second is overweight it's Troublesome when the aircraft is maneuvered whether is Altitude speed maneuverability all including takeoff and Landing performance are affected from the various data released by The Sue 75 its flight performance parameters are higher than the F35 but it is not easy to determine the overall combat performance of the two fighters because the F-35 has deficiencies in stealth design especially its belly design which is uneven in contrast the shape of the Sous 75 looks cleaner but some detail designs are not yet in place for example the side bomb bay of the Sous 75 is composed of several oblique lines not serrated this design does not seem to meet the requirements of stealth stealth and anti- stealth are a new trend in the development of weapon equipment for new Fighters stealth is a very important performance measurement indicator stealth Fighters are figuratively known as ghosts in the air their whereabouts are mysterious and they can effectively evade radar tracking so how does a stealth fighter become stealthy do you know let's take a look together friends who have seen Harry Potter must still remember the invisibility cloak in the movie This invisibility cloak is a gift Harry received it gave Harry a tiger's Wings in the process of Performing tasks friends invisibility really exists in our real life and it is in the physical phenomena around us do you believe it okay next we are going to do a small experiment we have prepared a beaker glass rod in water then next we are going to insert the first glass rod into the beaker filled with water let's take a look well due to the refraction of light when the glass rod is immersed in water a bending phenomenon occurs but it can still be seen very clearly then next we are going to pour oil into the second Beaker the second glass rod is inserted into a beaker filled with oil and one is encouraged to observe the ensuing changes contrary to expectations from a visual perspective the glass rod appears to become invisible upon immersion in the the oil the contrast between the two states is quite Stark at this point some may wonder what would happen if water were once again poured into the beaker filled with oil let's find out ah due to the density of the materials the water settles at the bottom while the oil floats on top next we insert the glass rod to see what changes occur as the glass rod passes through the oil region it continues to exhibit an invisibility effect however when it reaches the water region it re appears and it may seem as if a section of the glass rod is missing in the middle when viewed through the lens did you understand this little experiment the glass rod is clearly visible in water but it astonishingly becomes invisible in oil why is this so in fact the speed of light varies in different media the speed of light in water is only 3/4 of its speed in a vacuum and in glass it's only 2/3 of its speed in a vacuum the ratio of the speed of light in a vacuum to its speed in a medium is no as the refractive index the refractive index of water is 1.3 while
that of glass is 1.5 therefore the glass rod appears to bend at the interface of air and water however the refractive index of oil is also 1.5 which is very close to that of glass therefore there is no reflection or refraction at the interface of the glass rod in oil making them appear as one hence the spectacle of the glass rod becoming invisible in oil currently the main measures adopted for stealth technology against visible light detection in fighter jets include changing the light reflection characteristics of the aircraft shape using small flat surfaces for multiscattering instead of large curved surface reflection effects similar to mirror reflection controlling the brightness and chromaticity of the aircraft itself such as spraying camouflage on the surface to match the target with a background color and brightness and reasonably controlling the engine flame and tail Trace control of lighting and Beacon lights as well as flash signals of moving parts are also part of these measures there are actually many types of new materials in radar including Coatings and Structural Materials all of which can have a certain impact on stealth effects in general the design of the aircraft shape is the most critical if you do not design according to the stealth shape even if you use good materials and Coatings it is difficult to achieve the purpose of stealth it is probably a 70 to 30 split with 70% depending on the design of the aircraft shape right stealth shape and then 30% of the coating material of of course how much the coating accounts for and how much the material accounts for perhaps the coating has to account for a little more in the remaining 30% so all stealth Fighters need to apply absorbing Coatings to absorb radar waves and turn the electromagnetic energy of radar waves into heat that's right to dissipate it and of course there are some that cancel it out the application of radar stealth materials is an important way to improve the stealth performance of fighter jets a reasonable shape design can reduce the radar reflection cross-section of the fighter jet by more than 75% and then the use of stealth materials can further increase it to more than 90% radar stealth materials are mainly divided into two types namely wave transmitting materials and wave absorbing materials wave transmitting materials are a kind of non-metallic composite material that has little or no effect on electromagnetic waves and maintains a transparent state to them when the electromagnetic wave emitted by the radar hits the composite material it is difficult to induce the generation of electromagnetic flow and establish an electromagnetic field so the energy of secondary radiation to the radar is small but because it contains other metal materials manufactured inside such as engine wires and electronic equipment wave transmitting materials do not play a big role in reducing the radar reflection cross-section and can only serve as a protective coat for wave absorbing materials or a shielding container for active stealth technology wave absorbing materials refer to materials that can reduce the radar reflection cross-section of the target through their own absorption according to different absorption mechanisms they can be divided into three major types absorption type resonance type and attenuation type but their basic principle is to make the energy of the incident radar wave oscillate at the molecular level and through the dissipation of this movement it is converted into heat energy or other forms of energy thereby effectively weakening the radar Echo intensity of certain Key Parts depending on the application method wave absorbing materials can be divided into coating type wave absorbing materials and structural type wave absorbing materials in the future some stealth Fighters or some that already exist have integrated materials and Coatings for instance they have borrowed from the concept of Sandwich materials the middle layer of these materials can be electrified or when exposed to electromagnetic waves it can generate an electromagnetic field or produce electromagnetic waves to counteract the incoming radar waves from the perspective of Coatings and materials this is a problem that must be comprehensively considered for the next generation of stealth Fighters ideally the Structural Materials themselves should be able to serve the purpose of stealth as a supplement to radar detection infrared detectors are another important means of long-range detection of fighter jets with the rapid development of opto electronic technology more and more military powers are paying attention to infrared detection therefore an important task of stealth technology for fighter jets is to improve their anti-infarct detection capabilities this will definitely lead to the development of infrared stealth technology now in addition to radar stealth many countries aircraft designers pay special attention to infrared stealth because infrared stealth is also very important even crucial why is that because the temperature of your tail nozzle is very high which is exactly the focus of the infrared Seeker now air toare missiles have developed very quickly once they have a heat Source they can quickly fine and track you and you can't shake them off if you can lower the infrared signal characteristics you may be able to shake off the infrared dog fight missile especially in the end if you launch an infrared jamming bomb these jamming measures can achieve better effects in the future but if the exhaust temperature of your tail nozzle is high it will be difficult to achieve such effects infrared stealth technology is about using shielding low emission rate Coatings and heat suppression measures to reduce or change the infrared radiation characteristics of the Target and reduce the infrared radiation intensity and characteristics of the target this can be achieved by improving structural design and applying infrared physical principles to attenuate and absorb the infrared radiation energy of the target making it difficult for infrared detection equipment to detect the target stealth Fighters need to mount missiles to carry out strike missions in air combat which must mention its unique built-in bomb the built-in bomb bay is to take the missile into the skin so that the stealth effect of the entire aircraft will not be affected by the missile although many missiles now also consider stealth when they are mounted on external racks they will inevitably affect the stealth effect of the aircraft so when stealth needs to be ensured the missile should be hung in the built-in bomb bay let's go and understand the unique built-in bomb bay of stealth Fighters together the design of the built-in Bom Bay of stealth Fighters is not easy the first is the depth problem of the missile generally speaking the built-in Bom Bay of stealth Fighters is located in the middle of the fuselage from the relationship of air flow and pressure this position is in the low pressure area of the fuselage that is the missile will be subjected to an upward Force at the moment of extension the existence of this force can cause the missile to fly upwards it may also be pushed back into the bomb bay hitting it at present the main ways of extending built-in missiles are rotating the launcher and ejecting the American F-22 Raptor fighter uses the method of rotating the launcher which is more reliable but the mechanical structure is more complex and the rotation of the mechanism also requires a certain time it is worth mentioning that the Bombay also has its shortcomings because the built-in space of the fighter is very precious according to the normal idea most of these spaces should be used to configure engine built-in fuel tanks and other Hardware devices as much as possible to improve the flight performance of The Fighter therefore whether the missile is built in or external needs to be determined according to the situation if stealth performance is not considered the external rack can be fully utilized to maximize the performance of The Fighter but if you need to avoid ground radar and Patrol aircraft detection to carry out covert surprise attacks in order to minimize radar reflection area and avoid detection by the enemy it is necessary to adopt a built-in method for missile deployment these two types of missile deployment each have their own advantages and disadvantages essentially there is no distinction between good and bad adjustments need to be made according to the actual situation the stealth performance of stealth Fighters is mainly reflected in aspects such as shape electromagnetic visible light infrared and Acoustics most stealth Fighters adopt a single seat layout but modern Fighters can be designed with a double seat layout to adapt to different Mission requirements in 2021 it was the 10th anniversary of the maiden Flight of the j20 in the promotional video released by the official aviation industry a CG image that flashed by attracted widespread attention from the outside world the four j2s in the picture adopted a vertical double seat layout the j20 is a typical air superiority fighter it can use its excellent stealth performance and super maneuverability to tear apart the enemy's air defense network under Ultra longdistance conditions sees the Air Supremacy at the front end of the battlefield and is on par with the American F2 and the Russian s57 which are also heavy air superiority fighters fighters because they are mainly used for single air combat missions mostly adopt single seats while heavy Fighters or attack aircraft generally adopt double seats this is because heavy Fighters bear both air to Air and air to ground dual combat missions Pilots not only need to complete flight control but also need to attack air targets and ground targets because a double seat fighter has one more pilot it can take on more tasks so a double seat fighter can perform some tasks that a single seat fighter cannot perform or is difficult to perform alone for example Air Command electromagnetic suppression guided weapon projection Etc that is to say it can be driven by a single person or operated jointly by two people our j20 double seater is the world's first double seat stealth fighter then this may become a direction leading the world Trend and in the the future it may develop a series of stealth loyal wingmen or drone swarms if you want to rely on a pilot to drive his own plane and command a large number of drones this is probably too much to bear therefore this back seat may also take on the control of other loyal wingmen or drone swarms in the future loyal wingmen also have a huge role that is they can serve as the perception platform of the fifth generation aircraft and greatly expand the battlefield situation perception ability of the fifth generation aircraft through the data link at the same time it can also replace the fifth generation aircraft to perform high-risk strike missions the appearance of the j20 double seat fighter means that China has changed from catching up to innovation in the research and development of advanced Fighters with the progress of modern technology stealth technology and anti- stealth technology are like Spears and shields always restraining each other and promoting each other this is an endless Chase well dear audience thank you for your continued attention to the military Science and Technology channel of the National Defense mil Channel we will see you at the same time in the next issue familiar music tense plot wonderful fighting scenes futuristic weapons and equipment performed in the Classic Special Agent movie series let us appreciate the mysterious and brave life of special agents and also brought us countless High Tech equipment this episode will take us into the Classic Special Agent movies and explore the high-tech equipment in them [Music]
2024-04-27 11:04
