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Sukhoi PAK-FA / FGFA: Updates,News & Discussions

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Confusing..."52" written on nose, but "51" written on tail fin ?

@sancho


Nice find, no idea what the reason is for that. Maybe they had problems with the fin of the T55-2 and quickly took the one of the T55-1 to remain the test flights. The T50-1 was basically meant for aero dynamic test and might have less importance now.
 
PAK FA stealth features patent published | idrw.org

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Details of the Sukhoi Design Bureau's work on the stealthy aspects of the T-50 PAK FA fighter aircraft emerged in late December 2013, when the company's patents were published.

According to the patent paperwork, taken together, all of the stealthy measures offer significant improvements over legacy fighter designs. The papers claim that the radar cross-section (RCS) of an Su-27 was in the order of 10-15 m 2 , with the intention being to reduce the size of the RCS in the T-50 to an "average figure of 0.1-1 m 2 ".

In common with other low observable aircraft designs, this reduction is achieved through the use of radar-absorbing and radar-shielding materials and coatings, panel shaping (especially around the air intakes) and in the design of the junctions between moving elements, such as flaps and hatches.

In particular, the patent spells out the benefits of internal weapons carriage, s-shaped engine air ducts, (which were considered but are actually not implemented in the production PAK FA), and the use of radar blockers. It adds that the inlet guide vanes of the engines' compressors generate "a significant portion [up to 60%] of the radar cross-section of the airframe-powerplant system in the forward hemisphere" and that this is reduced by using radar-blocking devices and radar-absorbing coatings in the walls of the air ducts.

The shape of the airframe reduces the number of directions that radar signals are reflected in with the angles of sweep of the wings and the tail plane's leading and trailing edges, the edges of the air intakes and hatch covers being reduced and deflected from the aircraft's axis. Viewing the aircraft from the flank, the fuselage sides, lateral edges of the air intakes and vertical empennage are all deflected at the same angle.

Some openings and slots on the airframe's surface - such as the boundary-layer bleeds on the sides of the air intakes and the openings on the upper fuselage immediately aft of the cockpit - are covered with a thick grid, featuring a mesh of less than one quarter of the wavelength of a search radar, which reduces the reflections from these uneven surfaces. Gaps between the airframe elements are filled with conducting sealants, while the glazing of the cockpit canopy is metallised.

The surfaces of the PAK FA's own five radar arrays are also angled off from the vertical plane, helping to 'deflect' enemy radar signals. The covers of the radar arrays are selective, letting through their own signals, but blocking other frequencies. Additionally, the array compartments are edged with radar-absorbing 'curtains' to reduce possible leaks of these amplified signals.

Antennas are recessed from the surface of the skin to reduce protuberances (the vertical empennage serves as a communications antenna), while the turret of the aircraft's nose-mounted infrared search-and-track (IRST) sight is rotated backwards into a cruise position, exposing its rear hemisphere, which is covered with a radar-absorbing coating.

The release of this list of patents follows the July 2013 release of documentation covering the configuration of the fighter's integrated avionics suite.

There are currently five T-50 prototypes - the latest, T-50-5, first flew on 27 October 2013 - supporting the development programme and they are believed to have undertaken over 300 sorties to date.

In the 'Schedule of Activity for the Russian Ministry of Defence for 2013 to 2020' published in mid-2013, the PAK FA's Initial Operational Capability and the launch of full-scale series production is scheduled for 31 December 2016. The Russian National Armament Programme stipulates that 60 production PAK FA fighters will be delivered between 2016 and 2020.

The assembly of aircraft T-50-6-1 is nearing completion and three further aircraft (T-50-6-2, T-50-7 and T-50-8) are in build. One of the T-50-6 aircraft is intended for static trials and the other one is intended for flight testing.

https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0CC4QqQIwAA&url=http://www.janes.com/article/32190/pak-fa-stealth-features-patent-published&ei=f1XSUtmZF8PDrAe62IDABg&usg=AFQjCNHvNHpjAQxH-DG7ppmGG8jnsGgKUg&bvm=bv.59026428,d.bmk
 
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Any ideas when will India gets the first prototype of T-50 for testing?

The first prototype for us is meant to arrive this year, not sure when exactly though and I wouldn't be too surprised if it's just a version of the latest T50, without many changes, since IAF first might be interested in evaluate what the Russians have developed so far, before thinking about what changes are neccessary to meet their requirements.
 
The first prototype for us is meant to arrive this year, not sure when exactly though and I wouldn't be too surprised if it's just a version of the latest T50, without many changes, since IAF first might be interested in evaluate what the Russians have developed so far, before thinking about what changes are neccessary to meet their requirements.


There was an image from Sukhoi that showed India either is currently involved in development or will be involved in development.

Thanks to Joe for the following image, i will use his quote.


"Joint research on the electronic model'


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Also one of the displays for the pak-fa:


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There was an image from Sukhoi that showed India either is currently involved in development or will be involved in development.

India is already involved in the development, but of the FGFA not the current T50 or the Pak Fa. Indian officials stated that HAL scientists are already in Russia too, to work on the FGFA modifications.
 
PAK-FA/FGFA/T50: India, Russia Cooperate on 5th-Gen Fighter

Jan 16/14: T-50 trolling. Rosoboronexport’s parent firm Rostec decides to troll the aviation world for lolz, with claims that the PAK-FA will have better stealth than the American F-22 Raptor:

“The average [radar cross section value] for the T-50 fighter is between 0.1 and 1 square meter…. the T-50 is now ahead of not only all other fighters of the Russian Army, but also foreign models. For example, the visibility of the American fifth-generation F-22 fighter is 0.3-0.4 square meters, according to PAK FA chief designer Alexander Davidenko.”

It’s a troll because there Russian PAK-FA range includes values that are a closer match for the Eurofighter than the F-22, and because Davidenko couldn’t know the F-22′s real production values without access to American flight test data. There are rumors that it’s smaller than 0.3 m2. These claims support the idea that the PAK-FA/SU-50 will be a legitimate stealth aircraft design, but production work affects final values for any plane. If it’s shoddy and alignment is poor, for instance, a design with RCS 0.1 m2 could easily hit 1.0 m2 in reality. Russia is known for many things, including excellent and robust fighter designs, but precision work? Not so much. A real comparison would involve test data involving production aircraft (q.v. Nov 12/12 caveats), which will show different values from various angles, and different success levels against different radar bands. That isn’t on offer for either plane.

Other points in the release are more informative, if true. Rostec says that composite materials are just 25% of the fighter’s weight, but cover 70% of its surface. A new power system design from Rostec’s Aviation Equipment provides double the amount of power offered by previous Russian systems. We hope they have better luck than Boeing has, but that power will be needed by the new avionics and related systems from Radioelectronic Technologies. With respect to the plane’s biggest current deficit, UEC has initial-model of the next-generation AL-41F1 thrust-vectoring engines installed in a prototype now, and Rostec feeds general expectations that the AL-41s will give the fighter supercruise capability. Sources: Rostec
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, “The T-50 Fighter will feature even greater stealth capabilities” | Air & Cosmos, “Le T-50 russe serait plus furtif que le F-22″.

PAK-FA/FGFA/T50: India, Russia Cooperate on 5th-Gen Fighter
 
Russia can't deliver on Fifth Generation Fighter Aircraft: IAF

The Indian Air Force (IAF) has done a stunning about-turn, sharply criticising the showpiece Indo-Russian project to co-develop a futuristic Fifth Generation Fighter Aircraft (FGFA). Even as New Delhi and Moscow finalise a $6 billion deal to co-develop an FGFA with capabilities tailor-made for India, the IAF has alleged the Russians would be unable to meet their promises about its performance.

So vital is the FGFA considered for the IAF's future that Defence Minister A K Antony has publicly rejected any prospect of buying the American fifth generation F-35 Joint Strike Fighter, declaring the FGFA would suffice. In 2007, New Delhi and Moscow highlighted the fighter's criticality by signing an Inter Governmental Agreement (IGA) placing the project above MoD procurement rules. Moreover, Indian scientists say the expertise gained from the FGFA will provide crucial momentum for developing an all-Indian fifth generation fighter, designated the Advanced Medium Combat Aircraft (AMCA).

Yet, with so much riding on the FGFA, the IAF has taken aback the MoD with its complaint that it would not be good enough. On December 24, in a meeting in New Delhi chaired by Gokul Chandra Pati, the secretary of defence production, top IAF officials argued the FGFA has "shortfalls… in terms of performance and other technical features."

Business Standard has reviewed the minutes of that meeting. The IAF's three top objections to the FGFA were: (a) The Russians are reluctant to share critical design information with India; (b) The fighter's current AL-41F1 engines are inadequate, being mere upgrades of the Sukhoi-30MKI's AL-31 engines; and (c) It is too expensive. With India paying $6 billion to co-develop the FGFA, "a large percentage of IAF's capital budget will be locked up."

On January 15, the IAF renewed the attack in New Delhi, at a MoD meeting to review progress on the FGFA. The IAF's deputy chief of air staff (DCAS), its top procurement official, declared the FGFA's engine was unreliable, its radar inadequate, its stealth features badly engineered, India's work share too low, and that the fighter's price would be exorbitant by the time it enters service.

Top MoD sources suspect the IAF is undermining the FGFA to free up finances for buying 126 Rafale medium multi-role combat aircraft (MMRCA) for an estimated $18 billion, an acquisition that has run into financial headwinds because of budgetary constraints. In October 2012, then IAF boss, Air Chief Marshal NAK Browne, announced the IAF would buy only 144 FGFAs instead of the 214 that were originally planned. Having cut the numbers, the IAF is now questioning the very benefit of co-developing the FGFA with Russia.

Fifth-generation fighters are qualitatively superior to current "Generation 4.5" fighters like the Sukhoi-30MKI. They are designed for stealth, which makes these near-invisible to radar; they "supercruise", that is, fly at supersonic speed without lighting engine afterburners (which some current fighters like the Rafale also do); and they have futuristic avionics and missiles.

The MoD and HAL have countered the IAF's objections to the FGFA. Russian officials have clarified that the current prototype's engine, the AL-41F1, is a temporary solution to let the flight-test programme continue. A new engine being developed in Russia will eventually power both the FGFA and PAK-FA.

Officials also say the FGFA programme involves co-developing radar far superior to the one on current prototypes. The Russian Air Force wants conventional radar for its version of the FGFA, which looks only towards the front. The IAF wants two additional radars that look side-wards, allowing the pilot vision all around. Now the Russians are evaluating a similar requirement.

Asked for comments, the IAF has not responded. The MoD and HAL, who were requested for comments via email, have also remained silent.

While the MoD, HAL and the IAF continue discussions, Russia has gone ahead with developing a fifth-generation fighter. The Sukhoi Design Bureau has designed and done 300 test-flights of the T-50, the stealth fighter Sukhoi and Hindustan Aeronautics Ltd (HAL) plan to refine into the FGFA in about eight years. The Russian Air Force, which has less ambitious specifications than the IAF, plans to induct into service its own version of the T-50, the PAK-FA (Perspektivny Aviatsionny Kompleks Frontovoy Aviatsii, or 'Prospective Airborne Complex of Frontline Aviation') by 2017-18.

After the IGA of October 2007, a General Contract was signed in December 2008 between HAL and Rosoboronexport, Russia's defence exports agency. This laid out general principles of cooperation, such as work share, cost sharing and sale of the FGFA to third countries. In December 2010, a Preliminary Design Contract was signed, which led to the FGFA's basic configuration and selection of its systems and equipment. With that completed in June 2013, the crucial R&D contract is now being negotiated. This will encompass the actual design and development of the FGFA.

Russia can't deliver on Fifth Generation Fighter Aircraft: IAF | Business Standard
 
To me the article above (post #1794) looks more like pressurizing tactic to
1. Signing of MMRCA and getting rafales
2. Expediting the FGFA plan for IAF
3. Counter measure soundbytes to may be justify need of Medium Weight AMCA

The fact of the matter is India wont look at F 35 bcz of the latest frost bites in Indo US relations and generally strong perception of suspicion on USA. So the sound bytes assume significance as IAF is wanting the Value for big Bucks spending. Thus they are stating the benchmark expectations.. In a way, i see it as a very positive development. At least its clear that IAF is looking at a much superior variant then the present PAKFA bird. It would be really interesting to see how now russian and indian agencies tries to match IAF expectations and give confidence to them for purchasing arnd 144 birds which i am sure will eventually go to 200 ...

Good work IAF.. don say later.. say the things now.. Be clear and get the best u can for spending big bucks.. Also notch up the propaganda more and get the other deals also done asap
 
@sancho , any insights on this article????

Russia can't deliver on Fifth Generation Fighter Aircraft: IAF
The Indian Air Force alleges Russians reluctant to share critical design information, besides technical and cost issues

Ajai Shukla | Mumbai January 21, 2014

Do I have to say more? He is known to be A clueless about Air Force matters, B in the "routing" for the US (to say mildly).
 
Do I have to say more? He is known to be A clueless about Air Force matters, B in the "routing" for the US (to say mildly).
Every other month he is pushing for the F-35! First it was as an alternative for the Rafale, now this is an almost certainty he is going after the FGFA program?! Even after the IAF has specifically stated an F-35 buy is out of the question. One really does have to question his motives....
 
Every other month he is pushing for the F-35! First it was as an alternative for the Rafale, now this is an almost certainty he is going after the FGFA program?! Even after the IAF has specifically stated an F-35 buy is out of the question. One really does have to question his motives....

During the khobragade issue I saw a talkshow that he attended, was so funny what BS he stated in favour of the US. But it's not that unusual that media persons will be bought to spread one sided reports, or route the public opinion to a certain direction.
 
During the khobragade issue I saw a talkshow that he attended, was so funny what BS he stated in favour of the US. But it's not that unusual that media persons will be bought to spread one sided reports, or route the public opinion to a certain direction.
Agreed, the Indian media is usually pathetically ignorant and sensational and take sides without being aware of even some of the facts.
 
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