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Obeikt 770 (Object 770) prototype experimental heavy tank

Obeikt 770 (Object 770) was a prototype experimental heavy tank built in 1957. It was very similar to the Obeikt 277 but had a modified wheel arrangement, changing from seven small wheels each side to six larger wheels. The return rollers were also removed. It did not enter production. It was developed in 1957 by the ChTZ KB headed by P.Isakov. A prototype has been issued. The work was stopped in 1961. It was not in service. On display in what is best known as Hall 1 of the Kubinka Tank Museum, although its official title is now Pavilion 1 in Area 2 of the Park Patriot museum.

The overall layout is classical. Armament has a loading mechanism, an armament stabilizer in two planes, an automated guidance system, a sight-range finder; Day and night devices for shooting and surveillance. Protection of the body is cast-in-one with different thicknesses in height and body length; The turret is cast with an enlarged frontal part and an elongated stern. The engine is a DST-10, 10-cylinder, four-stroke diesel engine with a supercharging compressor and using the energy of exhaust gases, double row, cooling water; hydromechanical transmission with integrated hydro-transformer and planetary gearbox; individual hydro pneumatic suspension with hydraulic caterpillar tensioning mechanism; Motion control with the help of a motorcycle-type handle; support rollers with internal damping.

In 1956, the main Russian Army Tank-Automotive Directorate developed new tactical and technical requirements for the heavy tanks. On this basis, three of Leningrad and Chelyabinsk design team began almost on a competitive basis to develop a new languid tank, which had to change tank T-10. In the middle of "contestants" and was a heavy tank "to 770". This machine developed in KB Chelyabinsk tractor plant running Isakov PP Head designer. The new heavy tank was code "770". This machine, unlike rivals, was created "from scratch" only on the basis of new units with the introduction of promising design solutions. Armed with tanks was not accepted and it was done in a single experimental models.

"Object 770" had a traditional assembly of the usual placement in the fighting compartment 3 crew members. The corresponding feature and a new technical solution was cast housing, board which differed differentiated by length and width of your height. Inclined part bead had a variable slope angle (64 to 70 degrees) and a variable thickness (65-84 mm). A similar approach was used in the booking forehead body. The frontal armor was able to withstand the ingress of 122-mm armor-piercing projectile from a distance of 200 meters at all angles of fire. The thickness of the upper front part having a tilt angle of 60 degrees was 138 mm. The highest part of the sides of the hull had a thickness of 105 mm. To improve the armor protection edges around the perimeter of the case carried shoulder. Tower, as the body of the tank, was cast, with variable angles and wide walls, which in the end parts up to 290 mm (angle 30 degrees). The joint body of the turret and defended. For mounting an optical rangefinder sight frontal part of the turret expanded and extended to the stern of the automatic loading mechanism.

Armament of the experimental tank "Object 770 "consisted of a 130-mm gun M-65 and 14.5-mm machine gun KPVT paired with it. Dual-equipped with plane stabilizer "The Storm", also mechanized combat pack with electro-rammer, which provided the rate of 5-7 rounds / min and automatic guidance system. I Gunner had rangefinder sight TPD-2C, night and day observation and sighting devices (night sight TPN). Gun ammunition consisted of 37 shots, 18 of which were located in a turret in the loading mechanism. Ammunition of the gun 250 rounds of ammunition.

Motor installation of the experimental tank "Object 770" was developed under the Chudakov VD based on the diesel engine-2. 10-cylinder, two-row, four-row diesel DST-10 with the cooling water, supercharged by a compressor and a vertical arrangement of the cylinders installed in the aft perpendicular to the longitudinal axis of the tank. Motor power was 1,000 hp at 2500 rev / min. Motor power of "Object 770" on the tests at 2500 rev / min was 1000 hp. The engine was connected to the two-stream hydro mechanical gearbox, planetary gearbox and torque converter and all-encompassing. Torque Converter with 2 diffusers in power circuit box was included in parallel. The box provides 3 assists Front (one manual and two hydro) and a mechanical reverse gear. The peculiarity of the box and it was possible to start the drive motor from the tug, as the embodiment of engine braking (the inclusion of first gear and reverse). Motion control of the tank was made with the help of steering the motorcycle type.

The chassis used hydropneumatic suspension, tracks open iron hinge and hydraulic track adjusters, on each side of each accounted for 6 road wheels with large diameter internal cushioning. The drive wheel with removable gear rings was taken back. Design feature of the caterpillar drive was the lack of support rollers.

The crew was 4 people. "Object 770" was equipped with anti-nuclear defense, laying system, fire alarms, directional gyro, bedside devices, and a heating system crew compartment. Outside communication was performed using the R-113 radio station, inside tank intercom P-120.

Experiental heavy tank "Object 770" performed at the highest technical level. Alloy case and turret, having a pronounced differential reservation, provided the overcharge snaryadostoykost. The tank has good maneuverability characteristics and simply managed. Experts at the landfill, where the tests were all 3 experienced languid tanks, considered the "Object 770" is more promising. Now an experienced model of the machine on display at the Museum Kubinka armored vehicles.

Combat weight55 tons;
Crew4 people
Overall dimensions
Length with gun forward11333 mm;
Housing length728 mm;
Housing width 3400 mm
Height2420 mm;
Ground clearance430 mm;
Armor typecast, steel;
Forehead housing (top)138 mm (60 deg.) / 110 mm (66 deg.) / 85 mm (71 deg.)
Forehead body (bottom)187 mm (42 deg.) / 156 mm (51 deg.)
Board housing (top)86 mm (67 deg.)
Board housing (bottom)105 mm (0 deg.)
The forehead of the turret260 mm (30 deg.) / 184 mm (50 deg.) / 90 mm (70 deg.)
Board turret208 mm (35 deg.) / 152 mm (50 deg.) / 80 mm (70 deg.)
Mark and caliberM-65, 130 mm;
Type of gunrifled;
Barrel length59 calibers
Gun ammunition 26-37 shots
TDPS Scopes TPN-1
Machine gunKPVT 14.5mm; ammunition 250 shots
Enginediesel DST-10 supercharged;
Engine power 1000 hp (735 kW);
road speed55 km / h;
highway300 km;
Overcoming obstacles
rise35 degrees.;
depth of the water barriers ford1.0 m
Object 770 experimental heavy tank Object 770 experimental heavy tank Object 770 experimental heavy tank Object 770 experimental heavy tank Object 770 experimental heavy tank Object 770 experimental heavy tank

Object 770 experimental heavy tank

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Page last modified: 10-04-2019 10:16:58 ZULU