Su-57 Program Cancelled

[Frostbite]

And then The National Interest comes along and sites the Business Insider "stealth scientists" claims -which are complete and total nonsense that shouldn't have got past the editorial board- in their hit piece. And this is how the narrative about the su 57 has come into being

 

[Ultima Thule]

And then The National Interest comes along and sites the Business Insider "stealth scientists" claims -which are complete and total nonsense that shouldn't have got past the editorial board- in their hit piece. And this is how the narrative about the su 57 has come into being

They are able to reach top notch military/defense expert you twit @Frostbite

Wow. Just wow. The "stealth scientist" has no idea what he is talking about ! The verticals on the su 57 are all-moving. That's why there is a seam there. Not only are they all-moving, unlike the F-22 or F-35, they are made of composite material and they are half the size, which is superior for stealth. And they double as the air brake which is less wheight and moving parts. So this is the last place where anyone should be mocking the su 57.

Yet Business Insider is being passed off as a legit commentator on the su 57 !

And please tell me that Su-57 how to hide engine fan blade from radar, how to hide front mounted IRST, how to hide cockpit bracing, how to hide LAVCON from radar, please answer me you twit head @Frostbite

 

[Yongpeng Sun-Tastaufen]

Russians like to fight face to face, man to man. That's why they are a late comer when it comes to UCAV. Stealth, ambush, are more American combat philosophy. Anyway, there isn't anything that is totally stealth, only reduced RCS.

 

[Frostbite]

They are able to reach top notch military/defense expert you twit @Frostbite




e answer me you twit head @Frostbite

Here is some more from Business Insiders "top notch military/defense experts"

I just demonstrated with 2 factual examples that Business Insider either has NO CLUE what they are talking about or they are lying or both. You have no argument here.

They are able to reach top notch military/defense expert you twit @Frostbite


And please tell me that Su-57 how to hide engine fan blade from radar, how to hide front mounted IRST, how to hide cockpit bracing, how to hide LAVCON from radar, please answer me you twit head @Frostbite

Both the su 47 and Mig 1.44 had conventional S duct setups. So its not like Russia didn't know about conventional S ducts. Instead, it used the podded engine and offset intake design. Which is exactly what the YF-23 had. And the YF-23 has better all aspect stealth than the F-22. If your internet expert pseudo RCS doctrine says that 100% engine covering is a requirement, then you better change your pseudo RCS doctrine. Because its wrong.

The one famous pic of the su 57 gives the illusion that you are looking head on into the jet. And it gives the illusion that the engine is directly behind the intake. Reality is, its not.

About the IRST ??

From the Radar Detection of Spherical Targets document, section 7i: "Solid spheres made of nonconductive materials will generally have an RCS of approximately zero

^But your internet pseudo expert RCS handbook says "sphere bad" right ?

 

[Yongpeng Sun-Tastaufen]

Su-57's primary ground attack weapon is Kh-59MK2 cruise missile range 500+ km. It does fit in the weapon bay. It was tested in Syria earlier this year.

You can see Su-57 has the smallest side profile in the 5th gen category, having the smallest vertical stabilizers. All these contribute to smaller RCS than Su-27.

 

[Frostbite]

Russians like to fight face to face, man to man. That's why they are a late comer when it comes to UCAV. Stealth, ambush, are more American combat philosophy. Anyway, there isn't anything that is totally stealth, only reduced RCS.

That's exactly right. But the internet pseudo experts believe that stealth means invisible. And the F-22 is invisible and anything that deviates from the F-22 isn't invisible therefore isn't stealth.

Reality is, a jet is stealth if the shape of the fuselage has been computer generated to be optimized for low observability. Also planform alignment and internal weapons. There is something about the look of the J-20, F-22, F-35 and su 57 that makes them look similar. That is the stealth.

When the Pak Fa first came out, western defense officials first words were "Russia's plasma stealth had failed". How did they know this ? Because of the "careful shape" of the Pak fa prototype. Their words. Then they went on to call it the Raptorski for a couple years. But now today , they say "not stealth, doesn't look anything like F-22"

 

[Ultima Thule]

Here is some more from Business Insiders "top notch military/defense experts"

You twit head Su-57 is worst stealth design all among 5th gen jet @Frostbite

 

[Yongpeng Sun-Tastaufen]

You twit head Su-57 is worst stealth design all among 5th gen jet @Frostbite

@waz please take a look at @pakistanipower 's incessant trolling

 

[Ultima Thule]

Both the su 47 and Mig 1.44 had conventional S duct setups. So its not like Russia didn't know about conventional S ducts. Instead, it used the podded engine and offset intake design. Which is exactly what the YF-23 had. And the YF-23 has better all aspect stealth than the F-22. If your internet expert pseudo RCS doctrine says that 100% engine covering is a requirement, then you better change your pseudo RCS doctrine. Because its wrong.

The one famous pic of the su 57 gives the illusion that you are looking head on into the jet. And it gives the illusion that the engine is directly behind the intake. Reality is, its not.

About the IRST ??

From the Radar Detection of Spherical Targets document, section 7i: "Solid spheres made of nonconductive materials will generally have an RCS of approximately zero

^But your internet pseudo expert RCS handbook says "sphere bad" right ?

Keep blabbering without a clue, whether it uses S duct or not more than 80% engine fan blade is exposed to radar look at your first pics its clearly shows engine fan blade you retard @Frostbite

IRST conductive or not conductive it doesn't matter, it still increase a RCS, a main theme for Stealth jets are, your jet as much as possible to have a clean/smooth planform to be, your beloved Su-57 don't fellow this rule, and what about engines they have ability to hide from infrared/Radar from rear @Frostbite

And what about Bracing between the cockpit which increases its head on RCS @Frostbite

 

[Yongpeng Sun-Tastaufen]

Keep blabbering without a clue, whether it uses S duct or not more than 80% engine fan blade is exposed to radar look at your first pics its clearly shows engine fan blade you retard @Frostbite

IRST conductive or not conductive it doesn't matter, it still increase a RCS, a main theme for Stealth jets are, your jet as much as possible to have a clean/smooth planform to be, your beloved Su-57 don't fellow this rule, and what about engines they have ability to hide from infrared/Radar from rear @Frostbite

And what about Bracing between the cockpit which increases its head on RCS @Frostbite

That's why there is RAM on the engine. RAM absorbs radio.

 

[Ultima Thule]

@waz please take a look at @pakistanipower 's incessant trolling

Reply me with logic and commonsense if you have those qualities @undertakerwwefan

 

[Yongpeng Sun-Tastaufen]

Reply me with logic and commonsense if you have those qualities @undertakerwwefan

You diss Russia. You have bias. You say Su-57 is crap without giving a single explanation. That, my dear, is called, wait for it........... TROLLing.

 

[Ultima Thule]

That's why there is RAM on the engine. RAM absorbs radio.

you put the RAM on the engine @undertakerwwefan engine fan blade are made from titanium if put RAM material on a engine fan blade it degrade the engine performance @undertakerwwefan and show me the source that Su-57 engine fan blades using RAM materials @undertakerwwefan

 

[Yongpeng Sun-Tastaufen]

you put the RAM on the engine @undertakerwwefan engine fan blade are made from titanium if put RAM material on a engine fan blade it degrade the engine performance @undertakerwwefan and show me the source that Su-57 engine fan blades using RAM materials @undertakerwwefan

https://www.fighter-planes.com/stealth2.htm

Hostile radar range cut on Su-35s

Russian stealth researchers have developed materials and techniques that can reduce the head-on radar cross-section (RCS) of a Sukhoi Su-35 fighter by an order of magnitude, halving the range at which hostile radars can detect it. The research group - working with Sukhoi, but based at the Institute for Theoretical and Applied Electromagnetics (ITAE) at the Russian Academy of Sciences in Moscow - has performed more than 100 hours of testing on a reduced-RCS Su-35 and has also experimented with the use of plasmas - ionized gases - to reduce RCS.

US and European aircraft manufacturers have used specially developed materials to reduce the RCS of basically non-stealthy aircraft for many years. Notable examples include the Have Glass and Have Glass II modifications to the F-16. However, Russian work in this area was undisclosed until ITAE researchers presented a paper to a conference on stealth in London in late October 2003, which was organized by the International Quality and Productivity Centre.

According to the ITAE presentation, Russian researchers have developed mathematical tools that can calculate scattering from complex configurations, such as an Su-35 carrying a full external missile load, by breaking them down into small facets and adding the effects of edge waves and surface currents. The antennas are modelled separately and then are added to the entire RCS picture.

"A problem of huge size" is how the researchers describe the Su-35 inlet, with a straight duct that provides direct visibility to the entire face of the engine compressor. The basic solution has been to apply ferro-magnetic radar absorbent material (RAM) to the compressor face and to the inlet duct walls, but this involves challenges. The researchers note: the material cannot be allowed to constrict airflow or impede the operation of anti-icing systems and must withstand high-speed airflows and temperatures up to 200°C. The ITAE team has developed and tested coating materials that meet these standards. A layer of RAM between 0.7mm and 1.4mm thick is applied to the ducts and a 0.5mm coating is applied to the front stages of the low-pressure compressor, using a robotic spray system. The result is a 10-15dB reduction in the RCS contribution from the inlets.


The modified Su-35 also has a treated cockpit canopy which reflects radar waves, concealing the high RCS contribution from metal components in the cockpit. ITAE has developed a plasma-deposition process to deposit alternating layers of metallic and polymer materials, creating a coating that blocks radio-frequency waves, is resistant to cracking and crazing and does not trap solar heat in the cockpit. The plasma-coating process is then carried out robotically in a 22 m3 vacuum chamber.

ITAE and its partners have also developed plasma-type technology for applying ceramic coatings to the exhaust and afterburner. The conference video also showed the use of hand-held sprays to apply RAM to R-27 air-to-air missiles.

ITAE has studied at least three techniques for reducing the RCS contribution of the radar antenna, in addition to the simplest method of deflecting the antenna upwards and treating or shrouding other components. One of these is to design a radome that can be switched from RF-transparent to RF-reflective. The interior of the radome would be coated with a cadmium sulphide or cadmium selenide thin-film semiconductor material which changes conductivity when illuminated with visible or ultra-violet light. However, the problem of making such a film has not been solved.

A second technique that is also described in Western literature is to place a frequency selective surface screen in front of the antenna. This is a foil-like metal screen etched with small apertures which allow RF energy to pass within a narrow waveband, corresponding to the radar's own operating frequency. This reduces RCS, according to ITAE, but at the expense of radar performance.

However, ITAE has flight-tested a more exotic technology: the use of a low-temperature plasma screen in front of the radar antenna. The screen hardware is mounted in front of the antenna and is transparent to the radar when switched off. When activated, the screen absorbs some incoming radar energy and reflects the rest in safe directions over all RF bands lower than the frequency of the plasma cloud. It switches on and off in tens of microseconds, according to ITAE.

In principle, this is the same as the 'plasma stealth system that was reportedly developed by the Keldysh Scientific Research Center (also part of the Academy) in 1999.

At the time, it was claimed that the system, using a 100kg generator, could reduce the RCS of any aircraft by two orders of magnitude, or 20dB. ITAE has not attempted to develop a whole-aircraft system, but researchers expressed the view that it would be difficult to apply except to a high-altitude, low-airspeed aircraft because the airstream would dissipate the plasma faster than it could be generated.

The ITAE paper also gave some indications of the direction of stealth technology for future stealth aircraft. Test facilities include large compact indoor RCS ranges for large-scale models and outdoor ground-level ranges with short pylons that can be used to test full-size aircraft (rather than the models used for US pylon tests).

In future designs, one emphasis is on large, complex skin panels, reducing the number of gaps and mechanical fasteners in the skin.

Source: INTERNATIONAL DEFENSE REVIEW - JANUARY 01, 2004

 

[Ultima Thule]

You diss Russia. You have bias. You say Su-57 is crap without giving a single explanation. That, my dear, is called, wait for it........... TROLLing.

you're baseless troll not me @undertakerwwefan Engine fan blades exposed to the radar more than 80%, IRST expose to radar, cockpit bracing increases head on RCS, LAVCON increases RCS from front and to side, engine is exposed to radar and IR sensor, its not a All aspect/broadband design like F-22 is @undertakerwwefan enjoy: sorry to brust your bubble kid @undertakerwwefan

https://www.fighter-planes.com/stealth2.htm

Hostile radar range cut on Su-35s

Russian stealth researchers have developed materials and techniques that can reduce the head-on radar cross-section (RCS) of a Sukhoi Su-35 fighter by an order of magnitude, halving the range at which hostile radars can detect it. The research group - working with Sukhoi, but based at the Institute for Theoretical and Applied Electromagnetics (ITAE) at the Russian Academy of Sciences in Moscow - has performed more than 100 hours of testing on a reduced-RCS Su-35 and has also experimented with the use of plasmas - ionized gases - to reduce RCS.

US and European aircraft manufacturers have used specially developed materials to reduce the RCS of basically non-stealthy aircraft for many years. Notable examples include the Have Glass and Have Glass II modifications to the F-16. However, Russian work in this area was undisclosed until ITAE researchers presented a paper to a conference on stealth in London in late October 2003, which was organized by the International Quality and Productivity Centre.

According to the ITAE presentation, Russian researchers have developed mathematical tools that can calculate scattering from complex configurations, such as an Su-35 carrying a full external missile load, by breaking them down into small facets and adding the effects of edge waves and surface currents. The antennas are modelled separately and then are added to the entire RCS picture.

"A problem of huge size" is how the researchers describe the Su-35 inlet, with a straight duct that provides direct visibility to the entire face of the engine compressor. The basic solution has been to apply ferro-magnetic radar absorbent material (RAM) to the compressor face and to the inlet duct walls, but this involves challenges. The researchers note: the material cannot be allowed to constrict airflow or impede the operation of anti-icing systems and must withstand high-speed airflows and temperatures up to 200°C. The ITAE team has developed and tested coating materials that meet these standards. A layer of RAM between 0.7mm and 1.4mm thick is applied to the ducts and a 0.5mm coating is applied to the front stages of the low-pressure compressor, using a robotic spray system. The result is a 10-15dB reduction in the RCS contribution from the inlets.


The modified Su-35 also has a treated cockpit canopy which reflects radar waves, concealing the high RCS contribution from metal components in the cockpit. ITAE has developed a plasma-deposition process to deposit alternating layers of metallic and polymer materials, creating a coating that blocks radio-frequency waves, is resistant to cracking and crazing and does not trap solar heat in the cockpit. The plasma-coating process is then carried out robotically in a 22 m3 vacuum chamber.

ITAE and its partners have also developed plasma-type technology for applying ceramic coatings to the exhaust and afterburner. The conference video also showed the use of hand-held sprays to apply RAM to R-27 air-to-air missiles.

ITAE has studied at least three techniques for reducing the RCS contribution of the radar antenna, in addition to the simplest method of deflecting the antenna upwards and treating or shrouding other components. One of these is to design a radome that can be switched from RF-transparent to RF-reflective. The interior of the radome would be coated with a cadmium sulphide or cadmium selenide thin-film semiconductor material which changes conductivity when illuminated with visible or ultra-violet light. However, the problem of making such a film has not been solved.

A second technique that is also described in Western literature is to place a frequency selective surface screen in front of the antenna. This is a foil-like metal screen etched with small apertures which allow RF energy to pass within a narrow waveband, corresponding to the radar's own operating frequency. This reduces RCS, according to ITAE, but at the expense of radar performance.

However, ITAE has flight-tested a more exotic technology: the use of a low-temperature plasma screen in front of the radar antenna. The screen hardware is mounted in front of the antenna and is transparent to the radar when switched off. When activated, the screen absorbs some incoming radar energy and reflects the rest in safe directions over all RF bands lower than the frequency of the plasma cloud. It switches on and off in tens of microseconds, according to ITAE.

In principle, this is the same as the 'plasma stealth system that was reportedly developed by the Keldysh Scientific Research Center (also part of the Academy) in 1999.

At the time, it was claimed that the system, using a 100kg generator, could reduce the RCS of any aircraft by two orders of magnitude, or 20dB. ITAE has not attempted to develop a whole-aircraft system, but researchers expressed the view that it would be difficult to apply except to a high-altitude, low-airspeed aircraft because the airstream would dissipate the plasma faster than it could be generated.

The ITAE paper also gave some indications of the direction of stealth technology for future stealth aircraft. Test facilities include large compact indoor RCS ranges for large-scale models and outdoor ground-level ranges with short pylons that can be used to test full-size aircraft (rather than the models used for US pylon tests).

In future designs, one emphasis is on large, complex skin panels, reducing the number of gaps and mechanical fasteners in the skin.

Source: INTERNATIONAL DEFENSE REVIEW - JANUARY 01, 2004

Thank you, now you're using commonsense and logic @undertakerwwefan that post counts with prooof @undertakerwwefan