Military Review

Soviet experienced heavy tank "Object 770"

In 1956, the Main Armored Directorate of the Soviet Army developed new tactical and technical requirements for heavy tanks. On their basis, three Leningrad and Chelyabinsk design teams actually began on a competitive basis to develop a new heavy tank, which was supposed to replace the T-10 tank. Among the "contestants" was the heavy tank "Object 770". This machine was developed in the design bureau of the Chelyabinsk Tractor Plant under the guidance of Isakov P.P. - chief designer. The new heavy tank received an index - "Object 770". This machine, unlike competitors, was created "from scratch" on the basis of exclusively new units with the introduction of promising design solutions. The tank was not in service and it was made in a single prototype.

Heavy tank "Object 770" had a classic layout with the traditional placement in the fighting compartment of the three crew members. A characteristic feature and a new technical solution was a one-piece body, the sides of which differed in the thickness differentiated in length and height of armor. The sloping part of the sides had variable inclination angles (from 64 to 70 degrees) and variable thickness (mm 65-84). A similar approach was used in booking the forehead of the body. Frontal armor was able to withstand a hit of a 122-mm armor-piercing projectile from a distance of 200 meters at any angle of fire. The thickness of the upper frontal part of the angle of inclination 60 degrees was 138 mm. The upper part of the hull had a thickness of 105 mm. In order to increase the armor resistance of the edges, a shoulder was made around the entire perimeter of the hull. The turret, as well as the tank hull, was solid, with variable inclination angles and wall thickness, which is in the frontal parts up to 290 mm (the inclination angle is 30 degrees). The junction of the tower and the hull was protected. For mounting the optical rangefinder, the frontal part of the turret was extended, and the stern was extended to install a semi-automatic loader mechanism.

The armament of the experimental 770 Object consisted of an X-NUMX-mm M-130 cannon and a X-NUMX-mm KPVT machine gun paired with it. The twin unit was equipped with a two-plane Thunderstorm stabilizer, as well as a mechanized ammunition with an electromechanical rammer, which ensured the rate of fire of 65-14,5 rpm and automated guidance system. The gunner had a range-finder TPD-5С, night and day observation and aiming devices (night objective ТПН). Gun ammunition consisted of 7 shots, 2 of which were in the turret in the loader. Ammunition machine gun - 37 cartridges.

Soviet experienced heavy tank "Object 770"

The installation of the experimental heavy tank "Object 770" was developed under the direction of V. Chudakov. on the basis of the B-2 diesel engine. 10-cylinder, double-row, four-stroke diesel double-row DTN-10 with water cooling, supercharged from the compressor and vertical arrangement of cylinders was installed in the rear part of the tank perpendicular to the longitudinal axis. The power of the “Object 770” on testing at 2500 rpm was 1000 hp The engine was connected to a double-flow hydromechanical transmission with a planetary gearbox and a complex torque converter and. A torque converter with two guide vanes in the power transmission circuit was connected in parallel. Transmission provided 3 front transmission (one mechanical and two hydromechanical) and one mechanical reverse gear. A feature of the gearbox and its drive was the ability to start the engine from the tug, as well as the implementation of engine braking (including first gear and reverse). The movement control of the tank was carried out with the help of a motorcycle steering wheel.

In the undercarriage, a hydropneumatic suspension, tracks with an open metal hinge and a hydraulic mechanism for tensioning the tracks were used. Each board had 6 large-diameter track rollers with internal cushioning. The drive wheel with removable toothed rims was located at the rear. A feature of the crawler propulsion design was the lack of supporting rollers.

The crew of the tank - 4 man. The “770 object” was equipped with anti-nuclear protection, thermo-smoke equipment, an automatic fire-prevention system, a gyro-semi-compass, night-time equipment, and also a heating system for habitable compartments. External communication was carried out with the help of radio station P-113, internal - with a tank intercom P-120.

Experienced heavy tank "Object 770" performed at a high technical level. The cast hull and turret, with pronounced differentiated armoring, provided enhanced projectile resistance. The tank had good maneuverability and was easily controlled. Experts of the landfill, where they tested all three experienced heavy tanks, considered the "770 Object" the most promising. Today, a prototype of this machine is exhibited in Kubinka in the Museum of armored weapons and equipment.

Tactical and technical characteristics of an experienced heavy tank "Object 770":
Combat weight - 55 tons;
Crew - 4 man "
Length with a gun forward - 11333 mm;
Body length - 7280 mm;
Case width 3400 mm
Height - mm 2420;
Clearance - 430 mm;
Type of armor - cast, steel;
The forehead of the body (top) is 138 mm (60 degrees.) / 110 mm (66 degrees.) / 85 mm (71 degrees);
The forehead of the body (bottom) - 187 mm (42 degrees.) / 156 mm (51 degrees.);
Chassis side (top) - 86 mm (67 degrees);
Chassis side (bottom) - 105 mm (0 degrees);
Front of the tower - 260 mm (30 deg.) / 184 mm (50 deg.) / 90 mm (70 deg.);
The side of the tower is 208 mm (35 degrees) / 152 mm (50 degrees) / 80 mm (70 degrees);
Make and caliber of the gun - M-65, 130-mm;
Type of gun - rifled;
Barrel length - 59 calibers;
Ammunition 37 guns
Sights ТДПС, ТПН-1
Machine gun - KPVT caliber 14,5 mm;
Engine - diesel DTN-10 with supercharged;
Maximum power 1000 HP (735 kW);
Maximum speed on the highway - 55 km / h;
Cruising on the highway - 300 km;
Obstacle obstacles:
- rise - 35 hail .;
- ford - 1,0 m.

Based on materials:
21 comment

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  1. PistonizaToR
    PistonizaToR 25 January 2013 10: 01
    So what was the result?
  2. Witch
    Witch 25 January 2013 10: 34
    So it seems that they abandoned new heavy tanks altogether ...
    Yes, and Khrushchev with his rocketomania ....
  3. Avenger711
    Avenger711 25 January 2013 10: 40
    So here you are, tt 11th level. laughing
    1. 755962
      755962 25 January 2013 13: 14
      Judging by the positive ratings for your comment, MANY IN THE TOPIC !!!
      1. silver_roman
        silver_roman 25 January 2013 15: 30
        few now men are not in the subject))). tank battles overwhelmed the interest of all men))
  4. Armavir
    Armavir 25 January 2013 11: 01
    A powerful tank and beautiful, it’s a pity that they didn’t take into service, but remained an object ...
    1. Mikhado
      Mikhado 25 January 2013 13: 28
      Quote: Armavir

      A powerful tank and beautiful, it’s a pity that they didn’t take into service, but remained an object ...

      People, have you ever read an article? Hydraulic transmission and air suspension - and this is on a Soviet tank of the 50s and 60s ?? Over-boosted engine ??
      It's all very beautiful on paper, and the troops would howl.
      And then, in 1956, there was not enough ballistic protection, and the combined one in such a cast "remnant" is damn hard to shove.
      And the rinks? Without supporting rollers, without tire ...
      In general, this miracle is not viable; it’s good that they didn’t spend more money on it.
      1. cth; fyn
        cth; fyn 25 January 2013 15: 50
        However, cut the truth to the uterus, I completely agree - a headache for mechanics.
  5. Burmestr
    Burmestr 25 January 2013 11: 20
    In the course of UTB was supposed to be IS-9.
    It would be a pity a cool tank would be.
    Evo is needed in World of Tanks.
    1. 755962
      755962 25 January 2013 13: 15
      And you are in the subject ..
    2. Mikhado
      Mikhado 25 January 2013 13: 29
      Quote: Burmestr
      In the course of UTB was supposed to be IS-9.
      It would be a pity a cool tank would be.
      Evo is needed in World of Tanks.

      The cool tank was the IS-7, and much more real.
      1. Uncle
        Uncle 25 January 2013 14: 15
        Quote: Mikhado
        The cool tank was the IS-7, and much more real.

        Enlighten me an ignoramus in the tank theme, why is the T34-85 praised, and modern tanks are not like the T34, but the IP? Why do not they even remember about ISs?
      2. silver_roman
        silver_roman 25 January 2013 15: 35
        yeah, the seven was just brilliant. how much she was thought outwardly ....
        but she was too fat, and plus extremely unpleasant cases happened to her during the tests. like they banged her into the bochin, either a skating rink flew off, or something else and almost hit the Minister of Defense or some kind of marshal. there was a short article on this topic ... it's a pity, but there would be seven, there would be heavy and there would not be such a miracle as the T-64, and this is truly a land "god" of that time))
        1. Andrei
          Andrei 25 January 2013 21: 41
          Maybe you're right ... I read a little different from the IS-7 tank and during the tests the engine caught fire and this overshadowed the overall impression of the tank
          1. silver_roman
            silver_roman 28 January 2013 14: 12
            Yes Yes. it was like that. well, that remembered. Like then it was.
            like they wrote that the shell hit the tank area. they didn’t have time to make it out of metal, because he had a not quite standard form. made like either plastic or rubber. in short, this incident also referred to tragic and unfair events.
            not one gun of those times pierced the forehead of the seven. the most powerful was the tank. eh ... oh well
    3. Andrei
      Andrei 25 January 2013 21: 39
      No, there wouldn’t be IS-9 ...... for the simple reason that the IS-8 tank was renamed IS-9 then IS-10 .. when the tank was ready, Stalin died and the tank became known as T-10. ...
      1. Uncle
        Uncle 25 January 2013 22: 04
        Quote: Andrew
        when the tank was ready, Stalin died and the tank became known as the T-10 ....
        But the form is not like the T34, like the IP! Not the name of the matter. Where is KARS, he would enlighten ... smile
        1. silver_roman
          silver_roman 30 January 2013 18: 57
          Well, as far as I know, the letter "T" does not bind the tank to the T-34 series. besides, the T-34 is a medium tank, and the ISs were all heavy. That and the point was not at all in the death of Stalin, but in the fact that already heavy tanks were not needed. the name is not important .... it would be called is-7 t-7, it would not become worse or better from this ...
  6. 1946095andrey
    1946095andrey 25 January 2013 11: 23
    I saw it in our museum in Kiev, generally super looking !!!
    1. silver_roman
      silver_roman 25 January 2013 15: 37
      if you mean this tank, then this is not object 770, but is8 - t10. on the picture. it’s just from Kiev drinks
  7. evgenii67
    evgenii67 25 January 2013 12: 18
    On such a tank, go to the Germans, Americans or Jews and say:
    - And who is the coolest armor here ???? A joke of course, but seriously, if the tank was not adopted, then there were reasons for that ....
    1. Poppy
      Poppy 25 January 2013 12: 26
      and abandoned heavy tanks as a class, moved to the main
      1. Avenger711
        Avenger711 25 January 2013 13: 01
        In fact, even the first western MBTs are actually just heavy, that is, not the main tank was born, but the middle one died.
  8. castle
    castle 25 January 2013 18: 33
    The gun is very interesting. What was the ballistics of the barrel? Resource? The initial velocity of the projectile, if not mistaken, was calculated at 1030 m / s. How did all this fit into the tower !? Designers well done! Can someone write what test results were? I think in those days, and with such inertia of the barrel, there probably were problems with the aiming of the gun.
    1. Kars
      Kars 25 January 2013 18: 36

      most likely this is almost all, but the tool is on Wikipedia
      1. castle
        castle 25 January 2013 18: 44
        Read. Thank.