PAK FA, T-50: News #1

On Military Aircraft Engine

For military aircraft, we have created two engines - one for the aircraft, the Su-35 ", the second - for the Russian aircraft 5 th generation of T-50". The first - "117C" - is mainly intended for export. it is easier in terms of aerodynamics, and most importantly - targeted for aircraft with conventional arms, suspended on pylons outside the fuselage, with no strong constraints on dimensions. Such schemes are used on aircraft 4-th generation, exported to India and Malaysia.

The second engine - "117" - though only differ by one letter in the title, is much more advanced engine - this is a real engine of the 5-th generation. we sometimes hear from competitors the engine of 5-th generation should have such a blade, such and such materials, high-speed rotors, and you do not have this ... None of this is all just ways of achieving the goal. A single goal - increasing specific thrust, ie the ratio of thrust to its weight. For example, the first jet engine Arkhip Mikhailovich Cradles weighed 1350 kg and had the same cravings, that is, its specific thrust is equal to 1. The engine is the 4 th generation, "AL-31F, has already managed to achieve specific thrust of 8.7, and car 5 th generation, the figure is 10.

- What are the new challenges encountered when creating the plane 5 th generation?

Problems have to solve a thousand. Say, for reducing the radar visibility "T-50 has a scheme with an internal arrangement of weapons, so is becoming increasingly important problem of reducing its size. And that means we have to be develop and put into service a new weapon, but since it is low volume, it must be highly accurate. It therefore necessarily needs a fully functional GLONASS.

The American GPS, for obvious reasons is not suitable, since in times of crisis they will disable it, and both during the Ossetian-Georgian war, they impose an artificial shift in the coordinates of 300 km. Also need to know exactly, not just to shoot, but how do you shoot, so should be a modern mapping system. The missile itself should be unobtrusive. Such weapons are now manufactured, and all this affects the design of the engine. Work is proceeding according to plan ... In general, in my opinion, the plane turns out good, no worse than the American "F-22".

By the way, if we compare the T-50 "with the" F-22 ", Western sources say that the T-50" loses much of the last parameters such as infrared engine visibility in the rear hemisphere ?

We're working very intensely, and to reduce the infrared and radar visibility, and were twice as better performance in comparison with the "F-22" (at least for those data that are published and which I have).

Today, the Chinese have copied our Su-27 "and are ready to sell it on world markets at dumping prices. ?

We do not lose, because such an aircraft as we do, the Chinese have no time soon will be! They say that the plane made is 5-th generation, but you can say anything ... They are the best engine copied from our "AL-31F. We also do engine 5-th generation, and it is in all of its parameters on traction, in specific fuel consumption corresponds to the 5-th generation.

I open a secret and say that we actually already have two motors 5-th generation. The second, which is now conventionally called the "Type 30", has already been tested in flight on the fighter T-50 "According to its parameters it a 15-25 percent greater than "117 ".

Austin wrote:PAK-FA: IDA's unclassified analysis now online

Russia's Sukhoi PAK-FA stealthy fifth-generation fighter is showing promise in its test-flight programme and will probably fly at Moscow's MAKS air show in August, says United Aircraft chief Mikhail Pogosyan.

"There is no aircraft in the world that doesn't undergo certain modifications based on the test [programme] results. The most successful only require minor modifications to support systems. Our experience so far gives us confidence that we will avoid significant problems. The past year gives us sound grounds to say we are moving in the right direction.

"We're quite happy and pleased with the course of testing."

Two prototypes are now flying at the Gromov flight test centre at Zhukovsky, a suburb southeast of Moscow.

Russia has a requirement for 150 or more of the aircraft, which carries the internal Sukhoi designation of T-50, to enter service from 2015-16. India plans to buy between 200 and 250 of a modified design under the designation Fifth Generation Fighter Aircraft.

Pogosyan denies that New Delhi is simply providing funding for Russian designers to produce a modified aircraft for the Indian air force's requirements.

He says India is bringing its own engineering input to the joint variant, although he declines to detail New Delhi's contribution beyond saying it covers aspects of airframe design, software development and other systems.

Pogosyan points to previous co-operation between the two countries in which Indian engineers helped to develop the capabilities of the Sukhoi Su-30MKI in Indian service as evidence of India's engineering expertise.

Asked for his professional opinion on China's J-20 stealth fighter unveiled in January, Pogosyan says: "You'd better ask the Chinese."

Pressed on whether he feels the aircraft is a genuine prototype or merely a technology demonstrator, he says: "China's aviation industry has achieved really significant progress. But on the other hand, to create a really competitive product is time-consuming, demands significant experience in the engineering field and experienced human resources."

GarryB wrote:First of all clutter rejection is not a feature of the radar antenna or hardware, it is a software feature.

GarryB wrote:The issue with Doppler shift is amusing... an F-117 will have a specific flight path it will need to fly.

GarryB wrote:Its design reduces the range at which it can be detected,...

GarryB wrote:...but it is not invisible so it can't just fly anywhere it likes. If it were to fly directly over a radar site it will be detected so it will have a specific flight plan it will need to keep to to avoid being detected.

GarryB wrote:With this in mind on the threat of a stealth attack the enemy will not simply launch one fighter to search with radar to find the F-117, multiple aircraft will be sent to find the threat. Beaming one radar is simple... add another 4 radars located in different places and you will find it is not possible to beam all the radars. (Beaming means fly perpendicular so the closing speed is zero).

GarryB wrote:Finally using a B-52 to hide B-2s in its wake is stupidity.

GarryB wrote:The enormous RCS of the B-52 will attract interceptors from all over

GarryB wrote:... interceptors that will also be scanning for very small RCS objects called stealthy cruise missiles to see if any have been launched yet. They will use both radar and IRST to try to find those cruise missiles so if B-2s are there there is a very good chance they will find them too.