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MiG-25
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MiG-25 - Soviet fighter

MiG-25 - Soviet fighter

 

 

Soviet fighter Mikoyan Design Bureau produced commercially since the early 1970-ies. and was in service until the beginning of the XXI century., including in the countries of near and far abroad. So, in India to 2001 8 it was of this type of aircraft. MiG-25 has a very high performance, but at the same time and is not devoid of drawbacks, which did not allow him to become a leader in its class. In particular, it consumes excessive amount of fuel (10 1 liters per km), it determines that a small flight distance.

MiG-25

Powerplant: two turbojet engine designSK Tumansky R-31 91 kN thrust on when you turn on the afterburner - 122 kN.

 

DesignMiG-25

 

The aircraft is configured according to the type dvuhkilevoe monoplane. The design used the top position of the trapezoidal wing, two engines with all-moving stabilizer and lateral position adjustable air intakes.

 

The fuselage MiG-25 made by the monocoque type. In total he has 57 frames and from the engineering point of view, is composed of the front compartment, zakabinnogo compartment, air intakes, fuel tanks compartment, rear fuselage and tail coca. Hermetic cabin is located between the first two frames. Zakabinnogo compartment insulated and sealed.

MiG-25

The central part is an all-welded stainless steel compartment with lower additional beams and spars - a compartment of tanks of the fuel system. The most loaded part of the fuselage is the fuel tank compartment. It is adjoined by the rear and front fuselage, the wing and air intakes. There are six fuel tanks, which are divided among themselves by frame frames. In the tail part of the fuselage there are nodes for fixing keels, stabilizer beams, pendulum ridges, control rockers RP and hydraulic cylinders of brake flaps. It is made of steel VL-1.

 

Fighter-Interceptor has a trapezoidal swept wing with aerodynamic twist, the wing was installed at an angle of + 2 °. Wingspan in option scout was 13,38 m, in the version of the interceptor -. 14,015 m Scouts had a constant sweep of the front wing - 41 ° 02 '. For interceptors, this figure varied from 41 ° 02 'to 42 ° 30'. A wing is made of titanium and stainless steel. From an engineering point of view, it is composed of two consoles. Each console has partitions which divide the internal contents of the front and rear fuel tanks.

MiG-25

Above each console is placed two-piece aileron having a maximum deviation 25 ° angle. The two points are attached to the wing flaps, the maximum deflection angle of which at takeoff and landing, and the same is 25 °. Some copies of the MiG-25 first series had a deflection angle 47 ° flaps.

 

Keely made of aircraft alloy AK-4 and steel VNS-5. Camber each keel - 8 °, sweep angle - 54 °, height -. 3,05 m all-moving stabilizer has a sweep angle front 50 ° 22 ', swing - 8,8 m Angle with deviations -. From -32 ° to + 13 °. The deflection angle of rotation of the rudders - 25 °.

MiG-25

Chassis MiG-25 tricycle. Landing gear lever type. The front desk is equipped with two wheels in size 700 × 200, the main pillar - one wheel size 1300 × 360. Issuing and retracting landing gear, turn the front wheels are carried out by elements of the hydraulic system. landing gear in an emergency can be made by a pneumatic system. Basic rack equipped antiyuzovym machine.

 

The power unit includes single-shaft engines P15B-300 or P15BD-300, single-circuit with single-stage turbine, axial compressor, bicuspid ejector nozzle and afterburner. The motors are placed relative to the longitudinal axes at an angle of 13 °. The engines are separated by a fire partition. The nozzles of the engines are located at a distance that does not exceed their own diameter. Therefore, they were equipped with an uncontrolled runner, dismantling three parts of the outer flaps. Air intakes are adjustable. Each of them is composed of an adjustable wedge and a lower leaf. Purge of engine compartments for cooling is performed by outboard air.

MiG-25

The initial MiG-25P interceptor at full afterburner has a flight speed of 3000 km / h, carrying a full set of weapons - 4 R-40 missiles, which weigh in the amount of about 2 t and create considerable drag. Without rockets, the speed of flight increases by 15%. This was confirmed by American specialists who conducted the engine race, during which it was determined that the aircraft could be accelerated to 3400 km / h. The speed of the MiG-25R scout exceeds the interceptor's version. But during operation it is allowed to accelerate the car to a maximum of 3000 km / h. Theoretically, the plane was the fastest aircraft of its time, but in practice the American SR-71 flew faster than all - 3000-3300 km / h.

 

The structure of the fuel system consisted of six fuselage and four wing tanks. Main fuel - T-6, backup - T-7P. In some instances the additional fuel tanks were placed in the cavities of the keel. The total capacity of the tanks scouts - 15 245 kg, interceptors - 14 570 kg. For the sake of increasing the flight distance was used additional outboard tank, whose capacity was 4370 kg.

MiG-25 video

 

EquipmentMiG-25

 

Initially, the airplane was installed radar RP-25 «Smerch-A", which was created for a fighter-interceptor Tu-128. Immediately after the incident hijacking Japan MiG-25 began to equip a new radar "Sapphire C-25» and a new weapons system.

 

Also, Soviet aircraft was equipped with:

  • automatic control system SAU-155R1, or ACS-155P1;

  • navigation system SAU-155R1;

  • heat source 26SH-1;

  • radio command guidance system "Lazur" (Interceptor);

  • radio compass ARK-10;

  • radio altimeter RV-184 great heights;

  • air defense system L006 "Birch" or "Siren-3M";

  • navigation system near RSBN-6S "Coral";

  • intercom SPU-7;

  • CO-63B defendant;

  • SHS system air-Mo-5 signals;

  • Bitching Betty RI-65;

  • voice recorder MS-61 etc.

 

All Interceptors received as part of the equipment system, "Flight-1I". It includes radio engineering navigation system, and heading, and avtopilotirovaniya air signals. Scouts manned photographic-A or A-70 72, electronic intelligence station "Cube 3M", "Virage" or "Pitch", "Sabre" radar, is responsible for the side view.

 

MiG-25 photo

MiG-25

 

The performance characteristics of the MiG-25

  • Wingspan, m 14,00

  • Length, m 22,30

  • Height, m ​​5,64

  • Wing area, m2 56,20

  • Empty weight, kg 17410

  • Takeoff weight, kg 37500

  • Airspeed 3000km / h

  • flight radius km 700-800

  • Ceiling, m 30 000

 

MiG-25 photo

MiG-25 photo

 

The main armament:

  • missiles "air-ground"

 

Military aviation

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Comments

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The two pictures (foreshortening from below) are not MIG-25, and the MiG-31.

In terms of impact on development, as it is now customary to say, high-tech MIG-25 can be compared with the aircraft becoming the era of socialism, when the aircraft made a success of the young Soviet Union the most dynamic industry in the world.
The high speeds in 2.8M, for which the aircraft was calculated, required completely new production approaches and the technical re-equipment of the plants. There was a problem of kinetic heating, the solution of which required a creative, non-standard approach. When choosing the main structural material, the Mikoyans settled on stainless steel. The aluminum of high temperatures, which was customary in aircraft building, could not stand, and the titanium, with which foreign engineers worked, would make the MiG-25 inefficient in terms of price. The joints were welded, not riveted. I had to find methods for creating and applying heat-resistant coatings. MiG-25 required effective thermal insulation, new fuel, as well as special liquid formulations for refueling the hydraulic system and cooling system. At the "twenty-fifth" for the first time a single complex of PNO was used on the basis of an onboard analogue, and later a digital computer complex.
MiG-25 produced in versions of the interceptor, reconnaissance, tactical reconnaissance bomber and long remained a mystery to the competition. But 1976 of one copy was stolen in Japan. Glee knew no bounds - finally all the secrets revealed! Hasegawa company urgently even made a model airplane (1: 72). But the scandal has gone on advantage MiG-25. Soviet designers urgently modernized all instrumentation, and the machine will only win.

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