Sukhoi PAK FA

[Quickgun Murugan]

Flight Global's take on Pak-Fa

 

[gb009]

Just curious how good a source is flightglobal?

 

[notinlove]

Just curious how good a source is flightglobal?

Why do you wanna know? all the information seems pretty basic and common.

 

[Anshu Attri]

I KNEW THIS.......



http://en.rian.ru/russia/20100209/157824658.html


Russian 5th-generation fighter deliveries delayed until 2015

Deliveries of fifth-generation fighters to Russia's Air Force will start in 2015 rather than in 2013 as previously announced, the Air Force chief said on Tuesday.
"In 2013, I hope... the [Sukhoi] PAK FA prototype will be ready and fine-tuned, and we will start deliveries to military units in 2015," said Col. Gen. Alexander Zelin.
A prototype of the fighter made its maiden flight in Russia's Far East on January 29. Prime Minister Vladimir Putin said after the 47-minute flight that the first batch of fifth-generation fighters would go into service in 2013.
Russia has been developing its newest fighter since the 1990s. The current prototype, known as the T-50, was designed by the Sukhoi design bureau and built at a plant in Komsomolsk-on-Amur.
Russian officials have already hailed the fighter as "a unique warplane" that combines the capabilities of an air superiority fighter and attack aircraft.

 

[Anshu Attri]

http://www.defpro.com/daily/details/505/

On 29 January 2010, the Sukhoi PAK-FA (Perspektivnyi Aviatsionnyi Kompleks Frontovoi Aviatsy, literally "Future Front line Aircraft System"), which could variously be described as a technology demonstrator, the first prototype of the future T-50 fighter, or an intermediate step between the two, took to the air for the first time from the freezing runway of Dzemgi Air Force Base (shared with the KnAAPO plant) at Komsomolsk-on-Amur in the Russian Far East Siberia (see also http://www.defpro.com/daily/details/497/). A fundamental step has at last been accomplished in the development of the long-expected Russian response to the American F-22 RAPTOR air dominance fighter.

The aircraft, with Sukhoi test pilot Sergey Bogdan in the cockpit, remained airborne for 47 minutes, enabling an initial evaluation of its controllability, engine performance and primary systems operation, including retraction and extraction of the landing gear. “The aircraft performed excellently at all flight-test points. It is easy and comfortable to pilot”, said Sergey Bogdan.

“Today we’ve embarked on an extensive flight test programme of the 5th generation fighter,” commented Mikhail Pogosyan, Sukhoi Company Director General. “This is a great success of both Russian science and design school. This achievement rests upon a cooperation team comprised of more than a hundred of our suppliers and strategic partners. The PAK FA programme advances Russian aeronautics together with allied industries to an entirely new technological level. These aircraft, together with upgraded 4th generation fighters will define Russian Air Force potential for the next decades.

“Sukhoi plans to further elaborate on the PAK FA programme which will involve our Indian partners”, Mr Pogosyan added. “I am strongly convinced that our joint project will excel its Western rivals in cost-effectiveness and will not only allow strengthening the defence power of Russian and Indian Air Forces, but also gain a significant share of the world market”.

Some Russian sources have suggested that the T-50 will enter service in 2015 (e.g. Russian 5th-generation fighter deliveries delayed until 2015), but this is but wishful thinking. Only another flyable PAK FA prototype and a ground test item exist thus far, while Sukhoi has indicated they will complete five prototypes for initial testing. These are scheduled for completion in 2011-12, with the company expecting to then produce an initial batch of pre-series aircraft for operational trials by 2015. A more credible projected IOC date for the T-50 would thus be towards the end of the decade - i.e. some 12-15 years after the F-22. Such a delay would be roughly in line when not with the scientific and technological potential of the Russian aerospace industry, then certainly with the Russian MoD’s financial muscle and the irredeemable time loss of the “black years” following the collapse of the USSR. There are persistent rumours of the PAK FA programme being largely financed directly by Sukhoi (some 75%, with the remaining 25% being provided by India), and in any case it is quite obvious that it could only progress thanks to the substantial revenues from export sales of Su-27/-30s.

Much has already been written and speculated about this first Russian 5th combat aircraft, but virtually nothing is known for certain. The few photos and the couple of videos documenting the first flight are all that is available for a first assessment of the aircraft’s characteristics, analysing its overall external configuration and trying to deduct the Russian Air Force’s requirements on which the PAK FA design can be assumed to be tailored.


Operational Considerations

As expected, the twin-engine PAK FA is a large aircraft, with roughly the same physical size and weight class as the Su-27/-30 family it is aimed to replace. The aircraft’s general configuration strongly suggests a design optimised primarily for the air superiority role, even though the T-50 will almost certainly eventually go along the same road as the Su-27 and evolve into a very capable multirole fighter-bomber. This emphasis on air-to-air combat is arguably due to both the Russian Air Force perceiving its main roles in a very different way than the USAF, and the fact that the Service’s deep strike requirements are satisfactorily covered by the very capable (although admittedly not stealthy) Su-34s currently being delivered.

Even though it is nearly automatic to think of the PAK FA/T-50 in terms of a direct confrontation vs. the F-22, and this may indeed have been the original goal when the programme was first launched in the late 1980s, in the current global strategic scenario it is perhaps more likely that the Russians are rather interested in maintaining an air superiority edge over China’s current J-11s/SU-27s/-30s and future J-12. Also, the expected future worldwide usage of the F-35 JSF attack aircraft with its low observability qualities requires an interceptor capable to deal with this peculiar threat.

Further considerations can be done as regards the expected future place of the T-50 in the Russian Air Force’s inventory, and thus the overall combat aircraft programmes in Russia. When first information on the PAK FA project started to circulate, the programme was widely reported to be intended to replace both the Su-27 and the MiG-29, thus leading to a single-type combat aircraft fleet not unlike the French Air Force’s with its RAFALE. Whether this was purely “disinformacija”, or the Russians were actually planning in that direction back then, it is impossible to ascertain. The fact is, the T-50 given its size and expected avionics complexity will most definitely be an expensive aircraft both to procure and operate, and it is very difficult to imagine how the Russian Air Force could ever be able to acquire it in large number - not to mention the type, for all of Mr Pogosyan’s rosy forecast, having a rather limited potential export market. Current Western and unofficial Russian estimates are of a production run of some 250 aircraft for the Russian Air Force, and even this may prove to be overoptimistic. The combination of the T-50 as the spearhead of a tactical combat fleet composed largely by modernised 4th generation types, as suggested by Mr. Pogosyan, does certainly make sense - but it is rather doubtful whether it could really last for “decades”, apart from the Su-35. Also, the upgrade programmes currently underway do not involve the MiG-29.

Hence, and although the notion of the Russian MoD and national industry being able to sustain the simultaneous development and eventual procurement of t w o different 5th generation fighters does admittedly defy imagination, the eventual launch of a programme for a smaller and less expensive “lo” fighter in a “hi/lo” mix with the T-50 looks virtually compulsory. Failing to do so would leave the Russian Air Force critically crippled in quantitative terms, and would consign the future export market for “affordable” fighter aircraft to Western and Chinese designs.

 

[kuku]

Su-47 Berkut, aircraft with swept back wings mistakenly called 5th gen fighter... countries tried to make similar but issues of destructive load on the wing. Vladimir Vikulin goes on about how unique it is with composites and swept back wings which no one else has. Berkut is a single copy for tech demonstration but has no future, used for T-50 development. Companies producing parts for the prototype belongs 70% to Civil Rostekhnologii Chemezov.

If not superiority to US fighters, at least parity with them. Who wil fire first is the main issue in modern combat. Stealth technology means plane should emit less heat, minimum metal, nozzles and blades of engines using composite materials.

On American prototypes F-22/F-35 composite materials widely used, more than 40%. We are sure that in the future our fighter will use just as many composites says Nikolay Vymornov, Chief technologist of NPK Kompozit.

At the scientific production company, Technologiya, has developed a new carbon fibre material that will go on 5th generation.

We have created a snap-in system that does not pop out of the metal alloys. In the West this is very expensive. Explanation of why? There must be low coefficient of heat expansion. A lightweight composite tooling corresponds to the ratio and quality of the products and makes it better says Vladimir Vikulin.

In the battle to win where one has two equal stealth, the one with the better radar system wins. "When it comes to that, the RCS of our aircraft are within 1m^2 so we can effectively deal with the situation and even win some duels" said Vladimir Zagorodnii, Chief Designer and head of NIIP.

RCS is a measure of invisibility from the magnitude of reflection from enemy radar beams. The smaller the RCS, the more difficult to detect the aricraft.

Vladimir Zagorodnii lovingly examines the pride of his team, the radar for the new fighter. There are over four thousand small receiving-transmitting elements, such technology is called AFAR - active phased array antenna.

AFAR are the eyes and ears for the airplane, the more so for the fifth generation. It differs from passive antennas so that each channel of antennas are located for the transfer of power to amplifiers says Oleg Alexeyev, deputy chief designer of NIIP.

PESA must, for scanning and tracking, has to turn to locate . The 5th generation fighter radar is motionless, looking for and accompany themselves with the goals of the rays. If spotted by the enemy, no aerobatics will help but must get out of the zone of such a radar and is extremely difficult. And in the T-50 we will install five radars, one in front and two on each side with a phased array radar and a pair of UHF in the wings. Now at the Research Instrument of Design at Tikhomirova just achieved a maintenance mode with 20-30 goals. The potential for AFAR, say developers, yet for decades to come.

Perhaps in the future, T-50 and F-22 can fight in a training battle and see who wins. Then it becomes clear who dominates the skies.

Your twisting facts beyond belief, a composite able to be transparent to radar still emits back the return of the internal structure and what the composite structure does to negate that is truly beyond the boundaries of public forums.

That comment about radar could not be further from the truth, moving the electronic scanned array (in a way that still works with fronal RCS signature management) is a very impressive technique (even though it brings with it the disadvantage of putting a mechanical system which risks breaking down as opposed to a fixed electronically scanned array).

According to the basics of radar return (the application of PTD theory) stealth (which is not available on your fancy euro canards) is primarily implemented in design stage (planform alignment and internal weapons), and not the imaginary difference in finish you keep on talking about, beyond that its radar absorbing materials and design of components, which matters to a degree of "how much you want to spend, in designing the plane", for the last 10 percent every one chooses a solution, some choose a delayed project with three versions (carrier, conventional and vertical take off and landing) like the Americans, and some choose a single variant that is designed to be a deadly air to air performer (leaving the strike role to UCAVs that fly slow and can compensate for maneuverability compromises, so that the air force can field the plane in required numbers and signature management that can be compensated with EW

 

[Quickgun Murugan]

I KNEW THIS.......



http://en.rian.ru/russia/20100209/157824658.html


Russian 5th-generation fighter deliveries delayed until 2015

Deliveries of fifth-generation fighters to Russia's Air Force will start in 2015 rather than in 2013 as previously announced, the Air Force chief said on Tuesday.
"In 2013, I hope... the [Sukhoi] PAK FA prototype will be ready and fine-tuned, and we will start deliveries to military units in 2015," said Col. Gen. Alexander Zelin.
A prototype of the fighter made its maiden flight in Russia's Far East on January 29. Prime Minister Vladimir Putin said after the 47-minute flight that the first batch of fifth-generation fighters would go into service in 2013.
Russia has been developing its newest fighter since the 1990s. The current prototype, known as the T-50, was designed by the Sukhoi design bureau and built at a plant in Komsomolsk-on-Amur.
Russian officials have already hailed the fighter as "a unique warplane" that combines the capabilities of an air superiority fighter and attack aircraft.

Putin got excited and blurted out that by 2013 they will induct the 1st fighter. I don't belive that even 2015 is the expected induction date.

 

[Armand2REP]

Your twisting facts beyond belief, a composite able to be transparent to radar still emits back the return of the internal structure and what the composite structure does to negate that is truly beyond the boundaries of public forums.

That comment about radar could not be further from the truth, moving the electronic scanned array (in a way that still works with fronal RCS signature management) is a very impressive technique (even though it brings with it the disadvantage of putting a mechanical system which risks breaking down as opposed to a fixed electronically scanned array).

According to the basics of radar return (the application of PTD theory) stealth (which is not available on your fancy euro canards) is primarily implemented in design stage (planform alignment and internal weapons), and not the imaginary difference in finish you keep on talking about, beyond that its radar absorbing materials and design of components, which matters to a degree of "how much you want to spend, in designing the plane", for the last 10 percent every one chooses a solution, some choose a delayed project with three versions (carrier, conventional and vertical take off and landing) like the Americans, and some choose a single variant that is designed to be a deadly air to air performer (leaving the strike role to UCAVs that fly slow and can compensate for maneuverability compromises, so that the air force can field the plane in required numbers and signature management that can be compensated with EW

I'm not twisting anything... I was translating the video. Complain to the designers at NIIP if you have a problem.

 

[planeman]

Just a view, but I do not think that the 2013 and 2015 dates are a slip in schedule, just people referencing different stages of deployment. Inducting any modern combat aircraft into service takes years and in Russian practice initial government trails follow manufacturer's trails, and are followed by initial service entry (like pre-production, or IOC (Initial Operational Capability) milestones in Western parlance). So like any other modern combat jet PAK-FA will go through several phases before it is described as fully operational. Someone explained this better than I can on Military Photos.

 

[planeman]

Flight Global's take on Pak-Fa

Not a bad article. The 3-view is nice, but a few basic errors which could have been corrected. It lacks the moving LERX, the intakes and fuselage are too boxy rather than faceted, the spine is blended too early etc. Not knocking the artist's skills though.

 

[ppgj]

An interesting article of Peter Butowsky appeared in the French Air&Cosmos Magazine. I put here the original text and the translation in Russian. From interesting moments could be noted a sentence that the light 5th gen tactical aircraft variant will be developed starting from 2012.

http://igorrgroup.blogspot.com/2010/02/russian-5th-generation.html

there are scanned articles(5). it is all in french. however one article of interest here (with someone's translation on the blog site) -

and the translation abut 18 points -

1. Radar
2. MA "ball"
3. Detector infra-red radiation
4. Rear "appendix", which is probably the rear radar
5. Kiel
6. Monobloc horizontal tail on a titanium frame
7. Place for the gun (single-barreled, 30mm)
8. Place for mouth-wa-flight refueling
9. The movable part of the slat
10. Place the alleged location of the lateral radar
11. Two-piece rear aileron (?)
12. Engine with a vertically adjustable nozzle
13. Container for braking parachutes
14. Bays weapons
15. "The build-up, length 4,5 meters for missiles or electronics. The front part of the closing mechanism slats.
16. Places to sites outside of the suspension.
17. Designated eductors pticheskih and electromagnetic traps
18. The external skeleton of air ducts in the form of "S"

 

[ppgj]

2 seat PAKFA sketch -

frm the paralay.

 

[notinlove]

If the population continues to increase at the same rate we might need one of these

 

[Atul]

A Video of the PAK-FA....

Watch the Beast in Action.....

[video=metacafe;4105042/sukhoi_t_50_pak_fa_3/]http://www.metacafe.com/watch/4105042/sukhoi_t_50_pak_fa_3/[/video]

 

[gb009]

An interesting article of Peter Butowsky appeared in the French Air&Cosmos Magazine. I put here the original text and the translation in Russian. From interesting moments could be noted a sentence that the light 5th gen tactical aircraft variant will be developed starting from 2012.

http://igorrgroup.blogspot.com/2010/02/russian-5th-generation.html

there are scanned articles(5). it is all in french. however one article of interest here (with someone's translation on the blog site) -

and the translation abut 18 points -

1. Radar
2. MA "ball"
3. Detector infra-red radiation
4. Rear "appendix", which is probably the rear radar
5. Kiel
6. Monobloc horizontal tail on a titanium frame
7. Place for the gun (single-barreled, 30mm)
8. Place for mouth-wa-flight refueling
9. The movable part of the slat
10. Place the alleged location of the lateral radar
11. Two-piece rear aileron (?)
12. Engine with a vertically adjustable nozzle
13. Container for braking parachutes
14. Bays weapons
15. "The build-up, length 4,5 meters for missiles or electronics. The front part of the closing mechanism slats.
16. Places to sites outside of the suspension.
17. Designated eductors pticheskih and electromagnetic traps
18. The external skeleton of air ducts in the form of "S"

Just posting the entire translation from the link you have mentioned just so that no body misses it, I din't click the link 1st time I read through. All credit to whoever posted it(Anonymous):

Russian 5-th generation begins to take off

Sukhoi implemented on January 29th flight of the prototype T-50, the embodiment of Moscow's ambitions to create a machine gaining dominance in the air, comparable to the F-22 Raptor.

Historic event. It happened Jan. 29 in Komsomolsk-on Amur, where the extreme "newborn" Sukhoi made its takeoff. The prototype T-50, developed under the state program PAK FA and manned by Sergei Bogdanov, leaving the land for a test flight lasting 47 minutes. After a terse communique, issued on the occasion of Sukhoi, the flight was "successful, in full accordance with the objectives. The first flight was carried out to verify the "maneuverability aircraft, the normal operation of engines and main systems of the aircraft, as well as cleaning and opening the chassis. So, this is from the KnAAPO plant in Komsomolsk, the cradle of the Su-27, Su-30MK, Su-35 and the Superjet-100, where "the newborn" made its maiden flight. Translation testing program in the flight test center in Zhukovsky, outside Moscow, should occur in the coming months in order to successfully conduct more extensive tests.
New generation of combat aircraft, T-50, is the embodiment of Moscow's ambitions to obtain machine gaining dominance in the air, comparable to the American F-22 Raptor. In the official publications of the "dry" describes the main characteristics of the future PAK FA in the following manner: the ability to strike air-to-air missiles, air-to-surface missiles, air-to-surface missiles in all conditions, exclusive mavrennost, including and at supersonic speed, a small reflecting surface in radar, optical and infrared ranges, and finally, the ability to use shorter runways for take-off and landing.

Appearance. In what seemed 5-th Russian generation? If you compare it with the Su-27UB, which served as an aircraft maintenance during the first flight, you may now make a fairly accurate idea of the size T-50. The machine is generally smaller than the family "Flankerov, displaying a wingspan of about 14 meters and a length close to 20 meters. Takeoff weight machines without external suspension is about 21-22 tons, giving Thus Ratio of thrust-mass "of about 1.4, thanks to two turbines develops a unit capacity of 15 tons. Maximum takeoff weight T-50 can be estimated at 30 tons, with a useful range of flight of 3000 miles without refueling and external fuel tanks.

Photos and video materials published by the developer, confirmed the general appearance, the half-open in spring 2007, the figure of the artist, transiently published on the website motoroproizvoditelya Saturn. One can imagine that this figure was from a presentation to the official Indian delegation. Despite the jump in generations, you can see the "paw" Sukhoi "in the T-50: two strongly separated turbines, rectangular air intakes, elevated front part of the fuselage, the impressive" boom "behind the twin keel, opto-electronic ball, etc.
The main differences are glaring when we examine the car top and bottom. According to early estimates, the aircraft has a delta wing with rounded endings, swept about 53 ° and the edges of the end (? Do not know precisely how to translate "bords de fuite" - ACh) with a negative sweep at 10 °. The wing is increased due to significant slat, the front part of which is mobile and is the vortex generator - an innovative solution was presented in the figures, published in n ° 2200 Air & Cosmos. They replace the front Lockers canard "of Su-30 and, in general, reproducing their overall shape. Vertical empennage consists of two keels greatly reduced size, angled out at about 25 °, fully mobile and reproducing the form of such basic wing. All types of aircraft are organized, like the F-22, so that sopryach angles of attack and the expiration of focus and reflection of incident radar waves in a small number of directions.
No provision of certain extreme solutions, search invisibility nevertheless expressed in the transportation of arms in a closed compartment, the profiling of air in the ducts guessed the form of "S" for the screening of compressor blades in the forward hemisphere and in front of fizelyazha made of flat surfaces, which prevents not recall the F-35. Other details will be improved Sukhoi, such as the hood cab, basic metal frame which should disappear in the mass-produced versions, and applications of radar wave absorbing coatings. According to Russia's TV, "Sukhoi said that the ESR T-50 should be 40 times smaller than the Su-30.

Armament. First photos of T-50 can see the two compartments for weapons, placed tandem at the bottom of the fuselage and occupy all the space, which was the Su-30 from the nose landing gear to the turbine nozzles. With a length of about 4,7 meters and a width greater than 1 meter for each of the compartments can hold two missiles, air-to-air high (Type 810) or medium-range (K-77М), or two rockets at an air-to-surface X 38М or protivoradarnye X-58USHK. Three years ago (the first images date from the summer of 2007), and Su-47 Berkut was seen in flight with a new compartment for weapons, the length of 4,7 meters and a width of 0,9 meters - in a configuration that enabled us to test compartment for the T-50.
In addition to these two tandem compartments prototype T-50 also demonstrates the two "build-up", rather narrow, under the wing feathers, which can serve to accommodate the short-range missiles (R-73/K-74) each. At the same time, the lack of cover, noticeable on the test plane, allows to think that we can talk about the containers that contain electronic equipment, such as electronic warfare equipment or lateral radar. Under the wings also provided for fastening 6 additional hardpoints, including 2 under the air intakes.

Avionics. Development of electronic systems, T-50 is proceeding as planned pace, primarily due to ongoing work on the program Su-35 (two flight of the prototype in 2008), which earlier versions of PAK FA must have the same basic avionics, primarily in the regard to the dashboard of the cab and navigation and communication equipment.
At the same time T-50 must be equipped with a new onboard radar that are qualified as "mnogofuktsionalnaya. Named SH121 and developed in NIIP them. Tikhomirov, this system was first introduced to the air show MAKS-2009 (see the Air & Cosmos n ° 2184). It should consist of five AFAR: three located in front of the fuselage (one front and 2 side, working in a wave X band - the configuration originally envisaged in the program of the F-22A) and two working in the L wave band, located at the leading edge wings. The system, which according to NIIP may be supplemented by radar, operating in the wave range Ka (millimeter) and placed in a container. Detection and Recognition of aerial targets are also possible due to optical-electronic "ball" is characteristic of the family "Flankerov, placed in front of the cockpit and had already marked on the prototype T-50, the system is designed to UOMZ in Yekaterinburg.

Engines. Currently, the prototype T-50 driven by two turbines AL-41F1 (item 117), each of which develops 14.7 tons of thrust. This engine is an improved version of AL-41FS (117C), 14.2 tons of thrust, which is equipped with Su-35. The first flight tests of the AL-41F1 began Jan. 21, 2010 in Zhukovsky on board a flying laboratory Su-27 (n ° 710). Since early 2000's. motorization PAK FA was to be divided into 2 stages: the first prototypes and production machines should be equipped with the AL-41F1 in while the rest of the series will be equipped with more powerful engines, developing over 16 tons of traction and with less weight and lower cost of operation.
Published in 2006 the tender for this new engine was lifted in May 2007 after receiving responses from Saturn and MMPP Salyut, and still was not renewed. In January 2010, Director of Saturn, Ilya Fedorov, said that the new tender should be opened in the first Kartal this year.

What next? What is the future of the test program T-50? Currently, three fuselage vehicles for flight tests, ready or are in production, as well as three cars fuselage for ground tests. Also, three "flying laboratory" mobilized for the benefit of the program: a new system of flight, as well as individual structural elements are being tested on board a Su-47 Berkut, the AL-41F1 engine installed on the Su-27M n ° 710, while the test SH121 should begin this year on board the Su-30MK2 n ° 503. According to published Sukhoi plans, design tests to continue until 2012, after which the aircraft will be transferred to a military testing center in Aktobe to obtain state certification. After the first flight of Prime Minister Vladimir Putin also said that the first pre-production machine will be at the center of operational training at Lipetsk in 2013, and that the start of mass production expected in 2015 (strange discrepancy with what has been written on the forum, PMSM - ACh).

In 2012 will be held the first conceptual analysis, the results of which will decide the future of the program. One of the key decisions be taken on the motorization of the T-50: the failure of the first tender for the engine PAK FA takes this issue in the research and development at the Russian minders, who apparently have great difficulty in the issue of a significant increase in capacity of existing models. Time to start the production of a completely new engine that meets the desired requirements for PAK FA, is estimated at ten years.
It is also likely that in 2012 the program will begin a new light fighter to replace the MiG-29, which absorbs the new technology brought and tested at the prototype T-50. It is possible that the development of new fighter will be conducted KB RSK MiG, combined with that of "Sukhoi" under the overall leadership of Mikhail Pogosyan, both located at the head of military aircraft of the KLA.

1. Radar
2. MA "ball"
3. Detector infra-red radiation
4. Rear "appendix", which is probably the rear radar
5. Kiel
6. Monobloc horizontal tail on a titanium frame
7. Place for the gun (single-barreled, 30mm)
8. Place for mouth-wa-flight refueling
9. The movable part of the slat
10. Place the alleged location of the lateral radar
11. Two-piece rear aileron (?)
12. Engine with a vertically adjustable nozzle
13. Container for braking parachutes
14. Bays weapons
15. "The build-up, length 4,5 meters for missiles or electronics. The front part of the closing mechanism slats.
16. Places to sites outside of the suspension.
17. Designated eductors pticheskih and electromagnetic traps
18. The external skeleton of air ducts in the form of "S"

 

[marcos98]

found this amusing stuff on anothe forum..........wanted to share it with u guys
Sukhoi and Saturn/Lyulka have a lot of experience with flat VLO engine nozzles. They've developed one in 1990 for testing on a Su-27 flying laborotary.

Look at those nozzle surface tiles. Looks very much like ceramic heat dissipators in YF-23 engines. The technology was very similar (thrust vectoring, reverse thrust, etc) and hopefully Saturn/Lyulka engineers have still retained it. The only problem with those flat nozzles was that they were extremely heavy and lead to ~17% loss of engine thrust, but hopefully Saturn people have come up with composite materials to overcome these problems.

 

[Armand2REP]

^^ The ridiculous applications they tacked on with these exhaust flaps will never see it to fruitiion. Russia has to invent a totally new nozzle to replace the Iris.

 

[planeman]

That's not an attempt at stealth at all, it's an experimental TVC system. It was superseded by built-in TCV in the exhaust as per India's Su-30.

 

[gb009]

May be the Russians feel that as long as they have engines powerful enough to out run the enemy stealth on the rear is not that important.
By the way other than tail chase what other circumstances is rear-end stealth useful for?

 

[p2prada]

May be the Russians feel that as long as they have engines powerful enough to out run the enemy stealth on the rear is not that important.
By the way other than tail chase what other circumstances is rear-end stealth useful for?

Primarily protection while running away.