The Su-25T. Photo. Story. Characteristics.
The product T-8M Sukhoi Design Bureau better known as Su-25T. This machine is designed specifically to destroy armored vehicles, ships, bridges, manpower, as well as any air enemy targets. This combat vehicle can operate in all weather conditions and at any time. Combat missions can be carried out at altitudes of up to 30 5 thousand meters. Optimally, the plane is hot work at a depth of 450 kilometers behind the front line.
The first takeoff aircraft Su-25T model implemented in the summer of 1984 years, and serial production of the car began to 90 years. These machines were produced at the aviation plant in Tbilisi. Sioux 25T first presented to the public in the winter 1991 years in Dubai. For tests at the state level, they have continued to 1993 years. After the tests, the aircraft entered service in the Russian Air Force.
Design features of Su-25T
The aircraft is configured in a single embodiment, and differs from the standard of the original machine that, instead of the second pilot located the fuel tank and the compartment, which houses the radio equipment. Aircraft of this type has been equipped with a new system called the sight "Squall." Since it was located in the forward fuselage, it had to increase it. The changes were made and the location of guns they were moved by the fuel tanks.
The middle part of the fuselage of the machine is made in the same manner as in the previous versions. To this department belong engines and air intakes of the machine. Caudal machine equipped with soft tank of fuel and a full range of control systems and radio. Gondolas, to which is attached the power plant, were converted to the new engines of the R-95SH. As for the wing, it has remained the same and has not been perfected, there were only changed the brake pads. On the wings of Su-25T it was located on five special holders that could carry weapons of mass in 1 ton.
Plumage airplanes of two types: horizontal and vertical. With regard to the stabilizer unit, it can be positioned at three positions, depending on the problem, namely the flight mode, maneuvering or runway. Changing the position of the stabilizer is produced by a hydraulic cylinder.
Aircraft model Su-25T has a chassis with three pillars, which are cleaned in a special niche. Front support a little to the left, it has been made for the location of guns. Front desk has one steered wheel, which has a shield against dirt. With regard to the supports under the middle part of the device, they are the same as in the previous versions of the aircraft and the wheels equipped with braking systems. Issue and raising the chassis controls the hydraulic system. For more efficient aircraft has an additional braking parachute system, which is placed in the rear of the machine. This system is presented dvuhkupolny parachute type.
The cockpit is completely sealed and in the middle of a pressure that is 0,25 kg / cm2. This allows the pilot to feel more comfortable and to raise the aircraft to an altitude of 10 thousand meters. The cabin is made of all-welded, it is equipped with a titanium armor that allows the pilot to save even a direct hit 12-millimeter projectile.
All control of the machine is automatic, but most of the work carried out in flight elevators and management, as well as ailerons. For easy and comfortable management of all systems are equipped with hydraulic actuators. With regard to the control wiring, it is made on a rigid circuit, which increases its survivability. But the most important thing in management - is that the aircraft has a system that allows automatic flight. This type of system is the ACS-8 stabilizes vehicle's roll angle and, moreover, it is able to stabilize the flight. The plane on the machine can move both horizontally and vertically. This equipment is capable of the approach to a height of 50 meters.
Hydraulic machines differ only in the presence of the booster, which is disposed within the longitudinal bore, together with a control system.
As for the power plant, it consists of two new turbojet engines of the type P-195. The engines have afterburner system and are not equipped with adjustable nozzles. The gearbox is located at the power plant and is equipped with electric start, which operates on a standalone system. These engines give traction power 4300 kg. In addition, they have low levels of infrared radiation. Nozzles machine equipped with a central body, which facilitates better cooling by blowing cold air through it which comes from the air intakes. On Su-25T possible replacement of engines for other types of P-95SH.
Fuel system by pump supplies fuel to the power plant independently of the position of the aircraft in flight. Fuel machine taken in four tanks of the fuselage and wings in one apparatus. The total capacity of the tank is nearly five tons of fuel. For greater survivability on the battlefield, each engine has its own self-contained tank and looped system provides propulsion fuel from any tank. To prevent an explosion of tanks, they 70 percent filled with polyurethane foam. For spans machine available extra external fuel tanks with a capacity of 4 tons of fuel.
To rescue the pilot emergency aircraft such as Su-25T equipped with ejection system, which effectively works in all modes of flight and at any altitude.
Electricity is supplied by generators installed on the engines. The peculiarity is that the aircraft has a system of direct and alternating current, which is used for different systems. Voltage is 115 volts and frequency - 400 Hz. With regard to the lighting equipment, it is similar to the previous version.
This attack can be considered the pinnacle of design ideas at this time, as his equipment and characteristics are not inferior to the world analogues.
Features Sioux 25T:
Crew: 1 people
Length: 15,33 m (with LDPE)
Wingspan: 14,36 m
Height: 5,2 m
Wing area: 30,1 m²
Weight empty: 9 500 kg
Weight normal takeoff: 16 500 kg
Weight maximum take-off: 19 500 kg
Weight Fuel: 4890 kg
Engines: 2h turbojet P-195
Link: 2h 40 kN (4 500 kgs)
Armament of the Tu-25T:
Gunnery: dvuhstvolny 30-mm cannon GSH-30 200 with ammunition cartridges (built-in)
- missiles "air-to-air»: 2 x P 60M; 2-73 x P
- missiles "air-to-surface»: 16's ATGM "Vihp"; 6 x X 25ML (MT, MR, MP, MPU); 8 x C-25L; 2 x X 29L (T ML, TE, TM, TD); 2 58E x X (Y).
- Blocks NAR - 8 blocks of B-5 with HAP-5 (256 NAR);
- 8 blocks of NAR B-8; NAR's C-8 (160 NAR);
- 8 blocks of NAR B-13L; NAR's C-13 (40 NAR);
- NAR's 8-24 With B; NAR's C-24 FMR;
- 8's HAP-25; NAR's C-25 FMR.
Bombs: svobodnopadayuschie and responsive for various purposes, cluster bombs
- 2 x KAB-500Kp;
- AB x 10-100; 32-100 x AB in conjunction with the MDB-2-67U
- AB x 10-250;
- AB x 8-500;
- RBC's 8-250;
- RBC's 8-500;
- X KMGU 8-2;
- X ST 8-500;
In connection with finalizing a heavy aircraft carrier, cruiser TAKR 1143.5 project called "Tbilisi" (the first of the series) it was decided to establish the ship's fighter Su-28. But on the negative reasons, the project was stopped by the aircraft. To replace him the basic model was the Su-25UB. This solution engineers from Sukhoi adopted after flight testing in the summer of 1984 years. The tests were conducted for the Su-27 - off from the springboard to the base complex "Thread." At the same time experiencing the Su-25 (T8-4). He showed himself quite well. It was as a result of engineers from OKB and decided to use it as a base for the establishment of a training aircraft carrier-based nature of the training - T8-UTG, or Su-25UTG.
In order to develop a new aircraft identified a serial Su-25UB, lead engineer for flight tests appointed NP Petrukhina. The aircraft collected immediately, taking into account future improvements to strengthen the structure. Serial production was planned to hold an aircraft factory in Ulan-Ude, since 1988 years. In March, the fighter sent its own way on FOX OKB. There it established a hook and calibration ACA. The upgraded model of the sky raised test IV Votintsev.
In October, the aircraft ferried in Salem for a test program with the landing hook for cable arresting gear. All test flights carried VG Pugachev, IV Votintsev, SN Melnikov, EI Frolov, AV Krutov (test LII), AB Lavrikov and AI Fokin (military testers). For the first time T8-UTG1 piloted by test pilots and Votintseva Kruglov, he landed on the deck of an aircraft carrier aircraft carrier "Tbilisi". The entire program of tests for the basing of the ship was carried out on the 1991 1992 year. The ship was moved to Severomorsk.
In Ulan-Ude in 1990, it was created and released copies 12 small production batch of Su-25UTG. They were flown to Severomorsk for the transfer of the Northern Fleet aircraft in the framework of pilot training Sioux 27K. In the period of 1991 1995 year factory gathered another batch of five Su-25UTG. This party was the second and last.
Technical description of the Su-25UTG
The plane is created for pilots taking off and landing on the ground together with short take-off mechanism - an inclined ramp-jumping, the completion of landing - arresting gear and carrying out monitoring of pilots and cadets combat units and flight schools.
Flight performance Su-25UTG almost do not have much difference from the characteristics of the Su-school 25UB. Through installed on the machine equipment air flight and navigation destination is provided by working out off and landing aircraft in all weather conditions for training flights.
Sioux 25UTG much similar to the Su-25UB against aerodynamic configuration, the power plant and its systems, dimensions and weight characteristics, equipment, aircraft systems and the airframe structure from the chassis.
The process of training flights Sioux 25UTG is performed tasks Flight Training:
Taking off from the springboard.
Landing on the arrester using a catchy hook.
Study the art of piloting at any time and under any weather conditions.
Making the instrument flight and conducting "blind flight".
Education action in a case when there was an emergency, or simulated failure of navigation and navigation equipment.
Piloting (day and night).
The initial flight training centers and schools.
Battle serial Su-25UTG has some differences from the basic training model. The differences mainly concern the components and systems design. The Su-25UTG no blocks sighting equipment and weapon control systems, installation with guns, beam holders and pylons, broneekrany engines, radio communication units and elements of the defense system. But at the same time in the tail of the fuselage set the arrestor hook, which is a hook for braking and lateral stabilizers damper-lift. Attach a modified tail boom fuselage, the ability to perceive the load from the landing hook.
Since the parachute brake unit was removed, it was necessary to shorten the ending of the tail boom. Niche, designed for gun mount, sewed (placed at the head end). The second cabin installed a periscope vision of a front (EPP-1), and in the central part of the armored hatches replaced with plates of aluminum alloy. Instead of fighting harvested consoles have built in caps and portholes rangefinder.
When the plane was moved, we decided to retain the ability to install suspended four fuel tanks. Each of them could accommodate 800 l. PTB-800 placed at two under each wing, in view of possible emergency they can be reset.
When the plane takes off from the springboard, it is displayed on the angle of attack flight, taking into account the curvature of the ramp. Due to the length of the runway is significantly reduced. Before takeoff the pilot was taxiing the plane and puts on zaderzhnik, then switch on the maximum power setting and stabilizer down to the take-off position. Once the team is exempt from vehicle brakes zaderzhnika and produces acceleration of the runway in the direction of the jump. Output in the takeoff position angle of attack is carried out after the withdrawal from the springboard, and three seconds later dispersed to the flight speed.
NOSP (ground-optical landing system) is responsible for the process of entering the aircraft in the landing zone. Once in the beam optical system, a pilot with instrumentation takes the machine to reduce the height of a given glidepath. Flying over it is done on the calculated angle of attack delayed maximum speed. The process takes place before the wheels touching the chassis to the runway.
During the landing hook arresting hook slides on top of the runway and clings to the cable arresting gear. After the cable hooks aircraft goes the distance in meters 90 with the largest value of overload during braking (4-5 units).
Application of the Air Force
Earlier, the plane was in service with the Soviet Union and Ukraine. The "advice" aircraft served until the collapse, after which five Su-25UTG went to Ukraine. In 93-handed in their m-th ship 299 Regiment assault destination. In 94 3 year Instance was changed to the Russian Su-25UB and two sold in China and the United States.
At this point the remaining Su-25UTG are in service with the Russian Air Force.
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