Object 770

Object 770 - an experimental heavy tank "Object 770" was developed on the basis of new units in 1958 in Chelyabinsk Design Bureau under the leadership of P. P. Isakov .

Object 770
"Object 770" in the Armored Museum in Kubinka
Object 770
Classification	Heavy tank
Combat weight, t	55
Crew	four
Story
Developer	GSKB-2
Manufacturer
Years of production	1957
The number of issued, pcs.	one
Dimensions
Body length mm	7280
Length with gun forward, mm	11 333
Width mm	3400
Height mm	2420
Clearance mm	430
Reservation
Type of armor	Steel cast
Forehead of the body (top), mm / city.	138/60 110/66 85/71
The forehead of the body (bottom), mm / city.	187/42 156/51
Board of the case (top), mm / city.	86/67
Board of the case (bottom), mm / city.	105/0
Tower forehead, mm / city.	260/30 184/50 90/70
Board towers, mm / city.	208/35 152/50 80/70
Armament
Caliber and brand of guns	130 mm M-65
Gun type	rifled gun
Barrel length, calibres	59
Gun ammunition	37
Sights	TDPS, TPN-1
Machine guns	1 x 14.5 mm KPVT
Mobility
Engine type	DTN-10 Manufacturer Chelyabinsk Tractor Plant Mark DTN-10 Type of supercharged diesel Volume 32 150 cm 3 Maximum power 735 kW ( 999 hp ) at 2500 rpm Configuration Vertical parallel Cylinder ten Bore 160 mm Piston stroke 160 mm Compression ratio 13.5 Cooling liquid Timing (number of measures) four Recommended Fuel DL , DZ , YES
Engine power, l with.	1000
Speed ​​on the highway, km / h	55
Cruising on the highway , km	300
Specific Power, l s / t	18.2
Ground pressure, kg / cm²	0.795
Gradeability, hail.	35
Fording , m	1,0

The Object 770 power plant was developed on the basis of the V-2 diesel engine under the direction of V. D. Chudakov .

Unlike the “Object 277”, this tank was created on the basis of new units and had a number of original design solutions. The thickness of the frontal armor of the hull is 120 mm, the turret is 290 mm.

The armament consisted of a 130-mm M-65 gun with a two-plane “Thunderstorm” stabilizer and a KPVT machine gun . Ammunition - 26 artillery rounds and 250 rounds. The engine is a 10-cylinder, four-stroke diesel engine DTN-10 (1000 hp) with water cooling. The crew consisted of 4 people. The tank was equipped with a system of protection against weapons of mass destruction, an automatic fire-fighting system, thermal smoke equipment, night instruments and a gyro-hull.

“Object 770” had good maneuverability and was easy to manage. According to experts of the training ground, where all three experimental heavy tanks were tested, the “Object 770” seemed to them the most promising. A prototype of this machine is stored in the Museum of armored weapons and equipment in Kubinka.