as i said yaks looks much better and its fsw but its heavier 2 engined project.

hi, is that pic really come from yak or lightwave/maya made fanpics ?

Awww Sowry for stop the always hot pointless off topic discussion :dev2:
PAK FA: Conditions of Tender

The new commander-in-chief of Russia’s air force, who was named in May of this year, General-Colonel Aleksandr Zelin, has pointed out the need for conditions of tender in the selection of the motor builders’ proposals in the second stage of execution of the PAK FA project. In a short conversation with media representatives on 22 May (before the weekend military industrial commission PAK FA meeting) the CinC said that work on the PAK FA power plant has been broken into two stages. The first stage is the major upgrade of the existing AL-31F motor which is installed on airplanes of the Su-27 family. The second stage is supposed to conclude with the creation of a completely new engine. In the opinion of specialists, the main task of the first stage consists of reaching 14.5 – 15 tonnes of thrust (while maintaining all the weight parameters of the AL-31F), and the second is 16 tonnes (with an increase of air flow to 130 kilograms per second.)

At the request of the journalists, Aleksandr Zelin commented on the announcement of the technical director and general designer of NPO Saturn, Mikhail Kuz’menko, which was made on 16 May about the temporary stoppage of work on the PAK FA engine because of a shortage of budgetary financing. “These statements are tactical in nature,” the CinC said. In his opinion, an immediate allocation of funds “will be premature.” “Let us first complete the first stage!” – Zelin exclaimed.

“There is a general developer for this airplane – the Sukhoy OKB. In particular, it is determining the cooperation and composition of the project’s participants,” the CinC continued. He further noted, that the process for the selection of suppliers “is on a tender basis and all questions are being spoken beforehand.” At the same time, Zelin agrees with the need to provide financing of the necessary work according to successive stages of the creation of the PAK FA power plant “so as not to expect any kind of final results and forecast work for many years ahead.”

While the PAK FA project has been shrouded in secrecy, some information regarding its execution has reached the public. In the first stage, NPO Saturn had captured the lead on the power plant. It is promoting the Article 117 together with the Motor Building Production Association. This engine was selected by the P.O. Sukhoy OKB for equipping the new configuration Su-35 fighter. The Su-35 prototype will be lifted into the air later this year. It also is known that Sukhoy had been planning to use the Article 117 on the experimental PAK FA.

Article 117 was demonstrated in public at the MAKS-2005 international aerospace salon. On the accompanying placard was written: “Article 117. An AL-31F major upgrade program. NPO Saturn is realizing development of a new generation engine in accordance with a government program. The afterburning turbofan engine (Article 117S) is intended for the Su-35 airplane, and with modification of the engine nacelle and the airplane’s flight control system can be installed on the Su-27 and Su-30. The article 117 corresponds to the 4++ generation in degree of technical improvement and is a stage of the perfection of engine technologies for future highly maneuverable combat airplanes.”

According to the manufacturer’s data, Article 117 thrust is 14,500 kilograms of power in comparison with 12,500 – 12,800 kilograms of power for the AL-31F. They will achieve the thrust increase owing to an increase of the diameter of the fan’s inlet from 905 millimeters to 932 millimeters. Moreover, Article 117 has a new compressor which was created with the broad use of the experience and technology of the AL-41F which did not go into the series production for the MFI fighter (Article 1.44.) The series-built variant, which is designated the Article 117S, is supposed to have a service life to major overhaul of 1,000 hours and a total service life of 4,000 hours. In comparison with 500 and 1,000 hours respectively for the AL-31F. Sometimes they call experimental (uncertified as to announced service life) motors Article 117A. They already have tested them on the Su-27M flying laboratory with side number 710. At the present time, flights have been stopped until reasons for increased vibration have been cleared up (one may presume that the reason is in the unsteady operation of the compressor) and for corresponding revision. The experimental example of the Article 117 soon is supposed to be installed on a special Central Institute of Aviation Motors workbench for tests to confirm the announced parameters.

FGUP MMPP Salyut is a competitor to the Saturn people. It is proposing its own variants of AL-31F development. Salyut has developed the AL-31F-M1, -M2 and –M3 sequentially, each of which had a thrust higher than the previous. Russia’s air force certified the AL-31F-M1 in December 2007 and adopted it into the inventory as the “Al-31F, series 42.” This motor is intended for equipping upgraded Su-27SM fighters.

The MMPP Salyut general director, Yuriy Eliseev, announced on 22 May that his company has begun bench tests of the AL-31F-M3 and already has achieved a thrust of 15,300 kilograms of force. Bench tests of the AL-31F-M2 were completed in the fall of last year, with the achievement of 14,200 kilograms of thrust.

Eliseev also announced the beginning of work on a stage which follows the AL-31F-M3. In particular, assembly of a new high pressure compressor with six stages instead of the nine on the series-built AL-31F is beginning. A corresponding variant of the motor will consist entirely of new modules which were developed at MMPP Salyut in the period from 2001, when work on the AL-31F-M1 began. Included are a new combustion chamber, which has been created on the “double-layer wall” ((DVOYNAYA STENKA)) scheme (with a wall temperature 150 degrees lower owing to improved cooling, the temperature of the gases being maintained), and the turbines, which earlier has been tested on the –M2 and –M3.

The main feature of the AL-31F-M3 is the use of a new fan with an inlet diameter of 924 millimeters. It is distinguished with wide-chord blades and the absence of a shroud ring. The number of low pressure compressor stages has been decreased from four to three, but at the same time the degree of pressure increase has grown from 3.6 to 4.2.

The PAK FA prototype is supposed to lift into the air for the first time at the end of 2008. The “second stage” airplane, the engine of which still has to be chosen, may make first flight in 2012. Full-scale series production of the PAK FA final serial configuration with a second stage power plant preliminarily will begin in 2015.

Source: 13.08.07, Krasnaya Zvezda 13.08.2007, 16:48

It seems PAK-FA have problem with being biggest russian aviation project.
Politician and businessman all compete to grab some money from it 🙁

What bugs on the Shillelagh system are you talking about? I believe the system worked well enough.

your believe is not compatible with reality:diablo:

You mean the “Sukhoi” T-4? Did it employ stealth technology?
I don’t think the Soviets learned a lot about stealth from this aircraft – it only flew ten times in its flying career…:rolleyes:

Bye-bye world . I speak about TUPOLEV T-4 and he said about SUKHOI T-4 . but perhaps T-4 is as stealth as SR-71. yes 😀

[QUOTE=GarryB;1149434]Depends how you define stealth. A sniper covered in shrubery with his ghillie suit on hiding in places where he doesn’t move for hours is stealth. The SR-71 is a grunt with a camouflaged uniform on. You can see him no problem. The only issue is that that grunt gets into a Bradley when he goes to war and the bad guys have only had small arms and couldn’t reach him. Of course he never went into certain places where they have RPG-7s…
[QUOTE]

Alas russian elite stop the Tupolev T-4 project, otherwise russian have such ‘stealth’ (which is not) since 1970s:D

Ok, you specified a stealth air superiority
I’m not saying that the Russians couldn’t develop a 5th generation fighter with stealth capabilities equal to today’s F-22 – but that could well be just another example of the traditional 10 year “Soviet” technological lag!

We’ll just have to wait and see, won’t we…

Russia need less money than US. Stealth technology isnt very secret nowaday and since (as Lockheed ppl said themselves) Stealth is mostly geometric, by seeing f117 and f-22 geometry you know what will probably work.
Secondly : Actually first study on stealth geometry were done by Russian scientists back in 70s. So Russia know the theory very well.
Not sure about 10 year soviet technological gap. Su-17 proven to be more effective than Tornado in some aspect, Mi-24 Hind come before Apache, Russian fielded the first IFV and it was AT-8/AT-11 succesful barrel launch ATGM and not the Shillelaugh which never work.

I do, but i’m not saying anything.

according to gary on DT, PLAN subs have been doing this quite often in recent times.

sorry, submarine intrusion isnt confrontation. Errr… actually everyone who have submarine always doing intrusion. US do. Russia do. 3rd world nation do.

And maybe Japan do sub intrusion to China territory quite often too, they can and probably without detected!. Their ‘shio’ series (kuroshio, oyashio etc) long range SSK are silent, more silent than PLAN.

It is common game so usually nation intruded just keep silent except for politics.

I LOVE Austrian eurofighter scheme! add UN SPACY text and you got purrfect Macross paintscheme 😀

India can buy the little dinky plasma stuff then the Su and MiG will be stealth (albeit for a short time only)