Innovations T-50 PAKFA management system and weapons bays — Aviation Week

Innovations T-50 PAKFA management system and weapons bays - Aviation Week
August 19 recognizable aviation expert, editor of the magazine Aviation Week Svitmen Bill (Bill Sweetman) published a great article about the innovations that have been applied in the design of a promising fighter Russian fifth-generation T-50 PAKFA (material provided with some cuts — approx. «VP»).

First time in public mock T-50 appeared on Capital International Air Show in 2011 (while the plane made around 100 test flights, starting with the first held in January 2010). 5th layout should climb into the sky at the end of the year. First municipal acceptance tests should begin in 2014, mass production in 2015. Russian President Vladimir Putin said that the aircraft will be adopted in 2016. But this plane while flying on engines so-called perineum step that is likely to mean that the fighter to own completed form will be adopted in the «intermediate standard» that was typical of Russian military aviation.

Many details of the aircraft equipment and weapons remain classified, yet in recent months OKB. Sukhoi has received several patents, several ajar Zahav lurking around this aircraft.

Engineers «Sukhoi» identified several shortcomings of the South American F-22 fighter, namely, limited angular differences thrust vector engines. F-22 engines are placed very close to each other, which gives the ability to reject cravings yaw. This design also allows internal compartments guns positioned in the same plane on which the sliders are, they must be around or below the inlet ducts vozduhopoglotiteley. S-channels to reduce ESR added length and weight vozduhopoglotiteley. When entering into a tailspin thrust vector control is not so great, because the plane needs a huge control surfaces (fins and stabilizer).

T-50 is a certain symbiosis between the Su-27, but the center section has more depth to accommodate internal compartments guns. The aircraft has 12 control surfaces plus divergent nozzle engines (such makarom, exit 14). Front wing control surfaces are used symmetrically to maintain lift at huge angles of attack and adjust the wing profile in accordance with the Mach number. The ailerons are used only at low speeds and low altitudes, during takeoff and landing, when used as flaperons for growth lift. At a high speed by the slope control is carried out using flaperons and the horizontal stabilizer.

All-moving vertical tail (keels) T-50 have a small area and placed on the fixed pylons, effective control of the aircraft at supersonic speeds, in addition, are able to change the air brake.

Widely spaced engines allow us to make a large amount of internal compartments for guns. Vozduhopoglotiteli represent a compromise that does not allow them to close the curvature of the «face engine» (as on the F-22, F-35 and Eurofighter Typhoon), because they have a circular lock both the Boeing F/A-18E/F Super Hornet, also have antidusty lattice as the Su-27. According to calculations of Russian engineers vozduhopoglotiteli ensure achievement speed of Mach 2.

Innovations T-50 PAKFA management system and weapons bays - Aviation Week

Su-27, J-20, PAK-FA, F-22A. Source: Military-Industrial Courier

The main feature of the structure of T-50 is the presence of weapons bays across the length of the central section of the airframe. Fighters F-22 and F-35 gun compartments placed strictly in front of the power plant and the wing. But ensuring sufficient rigidity at the center-wing writhing on peak loads will be a very difficult task for the creators of the T-50. Because in the center section at the junction between the pods and the inner part of the wing spars are eight that distribute the load on the center section and assist in reducing the impact of peak loads on the centreline of the strip.

It is believed that the highest rate of the T-50 will be about Mach 2. Initially, the objective was to achieve a speed of 2.35 M, then this requirement was reduced to 2.1 M, and then to the current value of 2M. The Su-35S has the highest rate of 2.25 M. The basic premise of reducing the requirement for high-speed T-50 is a more extensive use of composite materials, while the Su-35S observed «intensive introduction of titanium.»

Innovations T-50 PAKFA management system and weapons bays - Aviation Week
Aviation high-Turbofan engine AL-41F1 («Article 117») with afterburner and all-aspect thrust vector control «first step» for the fighter fifth-generation PAK FA at the International Aviation and Space Salon MAKS-2011. (Doomych)
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Currently, T-50 models are equipped engines «article 117», which are more modern than 117C, which are installed on the Su-35S. Perhaps 117S is forthcoming development of the AL-31F with some technologies 117. As the developers say, the engine 117 has a specific thrust on the weight ratio of 10:1. But last month, the managing director of NPO «Saturn» Ilya Fedorov said that the company is developing a follow-turbofan under the designation «article 30», which will have a higher efficiency than the 117 and will come to equip the T-50 in 2020.

Maybe more disk imaging arming T-50 will be revealed at the upcoming exhibition MAKS-2013, but it seems that the plane at the initial stage of operation will have a gun in the inner compartments. General Director of «Tactical Missiles» Boris Obnosov said in an interview from 2012 that T-50 will develop a version of the existing RCC X 35UE and tactical X-38ME, guided missiles air combat RVV-MD (an improved version of the P-73E GOS with an expanded field of view and, as they say, with a 30% increase in range). On the military aircraft arrived with brand new anti-radiation missile sofa plumage X 58USHKE with a range of 245 km and a speed of 4M. Initially this PRR fixed plumage was created for the MiG-25M (NATO code Foxbat-E).

Hitherto, no final design for disk imaging tools internal compartments T-50, but can be fully that the plane has four separate compartments. Two compartments on the basis of the wing are designed to accommodate one SD RVV-MD. Tandem compartments located between the engines contain two missiles, but it is entirely possible that the front compartment has more depth to accommodate the large size of guns, such as X-58USHKE, aft compartment designed to accommodate SD combat air medium-range R-77.

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