Interview with Saturn GD V Chepkin
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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 ".
