Object 277
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Object 277
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[Client Values; Actual values in
6,100,000  Cost |
| 2200440 HP Hit Points |
| 55/6027.45/60 t Weight Limit |
- Commander (Radio Operator)
- Driver
- Gunner
- Loader
| 950950 hp Engine Power |
| 55/15 km/h Speed Limit |
| 3232 deg/s Traverse |
| 17.2734.61 hp/t Power/Wt Ratio |
| NoNo Pivot |
| // mm Hull Armor |
| 290/224/80290/224/80 mm Turret Armor |
AP/HEAT/HE
AP/HEAT/HE Shells |
1250/5200/990
1250/5200/990 Shell Cost |
| 490/490/640490/490/640 HP Damage |
| 265/340/65265/340/65 mm Penetration |
|
4.8 r/m ▲
4.8 r/m Standard Gun ▲ Rate of Fire Standard Gun |
|
2352 ▲
Standard Gun
▼
Standard Gun
▲
2352 Standard Gun ▲
Standard Gun
▼
Standard Gun
▲ Damage Per Minute Standard Gun |
|
0.38 m ▲
0.38 m With 50% Crew: 0.471 m ▲ Accuracy With 50% Crew: 0.471 m |
| 2.7 s 2.7 s Aim time |
| 2727 deg/s Turret Traverse |
| 360° Gun Arc |
| -6°/+16°-6°/+16° Elevation Arc |
| 3535 rounds Ammo Capacity |
| 1212 % Chance of Fire |
| 400 m 400 m View Range |
| 730 m 730 m Signal Range |
X
6100000
The Object 277 is a Soviet tier 10 heavy tank.
Developed in 1956–1958 at the Kirov Plant, Leningrad, under the supervision of Joseph Kotin. Two prototypes were produced and underwent trials from 1959 through 1960. A hull and a turret were produced for testing for shell resistance. The development was discontinued in the summer of 1960 due to insufficient development of certain systems and components. In addition, the vehicle did not demonstrate any advantage over the Object 770 heavy tank.
The Object 277 marks the end of its Soviet heavy line.
Modules / Available Equipment and Consumables
Modules
Guns
| Tier | Gun | Penetration (mm) |
Damage (HP) |
Rate of fire (rounds/minute) |
Dispersion (m/100m) |
Aiming time (s) |
Weight (kg) |
Price (  )
| |
|---|---|---|---|---|---|---|---|---|---|
| X | 130 mm M-65 | 265/340/65 | 490/490/640 | 4.8 | 0.38 | 2.7 | 4300 | 330000 |
Engines
| Tier | Engine | Engine Power (hp) |
Chance of Fire on Impact (%) |
Weight (kg) |
Price ( )
| |
|---|---|---|---|---|---|---|
| X | M-850 | 950 | 12 | 1550 | 132000 |
Suspensions
| Tier | Suspension | Load Limit (т) |
Traverse Speed (gr/sec) |
Rmin | Weight (kg) |
Price ( )
| |
|---|---|---|---|---|---|---|---|
| X | Object 277 | 60 | 32 | B/2 | 9220 | 82500 |
Radios
| Tier | Radio | Signal Range (m) |
Weight (kg) |
Price ( )
| |
|---|---|---|---|---|---|
| X | R-113 | 730 | 80 | 52200 |
Compatible Equipment
Compatible Consumables
Player Opinion
Pros and Cons
Pros:
- Powerful 130mm gun with the second best penetration among Tier 10 heavy tanks
- Very strong turret armor with few, small weakspots
- Unusually shaped upper glacis is covered in angled surfaces and is very bouncy
- Side hull is protected with spaced armor, excellent for sidescraping
- Excellent top speed and acceleration, one of the fastest Tier 10 heavy tanks
Cons:
- Upper glacis can be unreliable, and the lower plate is very vulnerable
- Very high terrain resistance, bleeds a lot of speed while turning and on unpaved terrain
- Poor gun depression, though marginally better than average for a Russian tank
- Big target with a very long hull, can be hard to hide and is an easy target for artillery
- Extremely vulnerable to ammo rack damage/destruction
Performance
An evolution from the famous T-10, this tank can be considered an even more medium-like hybrid heavy. Featuring the rounded cast glacis and partially the V-shaped sides, the 277's hull can be just as, or perhaps even more bouncy than the Object 907. But it's the turret, which houses the intimidating 130mm M-65 cannon truly stands out; not to mention it has much sturdier face and thicker roof. These may appear nothing spectacular for the heavy-weight brawlers, but the 277 could roll into action no later than its medium teammates, where its value lies. Lead an swift attack with good co-ordination like an 113 would, take key positions early on and punish any daring opponents with your high alpha damage. If required to take defensive, put the decent gun handling and strong turret to good use: find hull-down cover. With its still acceptable agility on hard surface, it could also take the role of flanker in urban-themed brawling maps if no other more suitable tanks are present.
When compared to the WZ-111 5A, it has better mobility, accuracy, penetration and gun handling with bouncier upper glacis; while better DPM, gun depression and agility defines the 5A as the better brawler.
Early Research
This vehicle comes elite in its stock configuration.
Suggested Equipment
Gallery
Historical Info
Characteristics
The Obiekt 277 was the ultimate evolution of the T-10 series and used a new cast bow, a modernised hull evolved out of the T-10 chassis, but lengthened with an additional set of road wheels. The armament consisted of a 130mm M-65 gun with a horizontal sliding breech, multiple baffle muzzle brake and bore evacuator, 'Groza' two-axis gun stabilization system, and a TPN-1 night sight. With a view to operating in a nuclear environment, a PAZ nuclear overpressure system was installed, as was a full set of night vision equipment for the turret crew and the driver. The 14.5mm KPVT co-axial machine guns could be used as a ranging weapon for the main armament. Elevation was -5° to 16° with electro-hydraulic turret traverse and manual override. The Obiekt 277 had a direct fire range of 1230m against a 2m target. In 1959 a sub-calibre APFSDS round was made available for the 130mm M-65, with a direct fire range of 2150m. The Obiekt 277 was provided with a mechanically operated ammunition carousel located in the lower turret for the separate loading two-piece ammunition, with 15 projectiles stored vertically and 15 cartridges stored horizontally. The ammunition complement was a total of 26-35 rounds. The AP rounds weighed 30.7 kg, hence the requirement for an electro-mechanical autoloader.
Development
A major issue with the tank was the length of the gun barrel. Soviet commanders were wary of guns that projected far ahead of the tank for fear that in combat the armament would strike the ground on rough terrain and thus incapacitate the gun, or worse, damage it to the point of requiring depot level maintenance not possible in combat. There was a precedent to this, in that during the trials of the SU-100 self-propelled gun there were problems with the gun barrel grounding, and SU-100 driver-mechanics had to be particularly careful in operating the vehicle. With the gun forward, the Obiekt 277 had a total length of 11.78m, so that the driver-mechanic was required to drive with considerable care, reminiscent of issues encountered with the earlier SU-100.
The glacis armour of the Obiekt 277 provided protection against 122mm rounds and 90mm cumulative rounds, although testing was not completed before the project was cancelled. Unlike the rolled homogenous armour plate glacis of the T-10 series, the Obiekt 277 used cast glacis armour. It had a maximum glacis armour basis of 140mm, set at 60-70° from vertical, with the lower glacis with the lower glacis correspondingly 153mm at 50–55° from vertical. The turret had maximum frontal armour of 290mm, with a minimum of 139mm, set at 30–60° from vertical, with maximum turret side armour of 236mm and a minimum of 138mm set at 30–55° from vertical. All in all, the Obiekt-277 was a remarkably strongly armoured tank, but that armour came at a cost relative to prescribed limits on overall heavy tank combat weight.
The Obiekt 277 was powered by an M-850 V-12 liquid cooled diesel engine developing 1090hp, created by the KB of the Zvezda Plant in Leningrad on the basis of the M-50 diesel engine used in Soviet torpedo boats, and in turn developed from the AN-1 aircraft engine. The engine was started by an S-3 electric starter developing 25hp or by means of two 5 litre compressed air cylinders. A pre-heater was provided for cold temperature starting. Fuel was 820 litres internally under armour and 250 litres externally, giving the tank a total road range of 300km with its maximum road speed of 55km/h. It used two-stage air cleaners, stage one being a ‘cyclone’ and stage two being a cassette-type oil bath cleaner. The engine and transmission were mounted as a single unit, with an 8-speed planetary transmission and ‘ZK’- type steering mechanism taken from the T-10. The final drives were provided with hydraulically assisted disc brakes. An MTO automatic fire suppression system was installed, as was a TDA-type fuel injection smoke laying system.
The tank was provided with a lengthened hull supported on eight road wheels. The torsion bar suspension was strengthened by the use of additional hydraulic recuperators and hydraulic shock absorbers on the first, second and eighth wheel stations, with bounce stops on all but the last wheel station. The tank used four return rollers. The tracks were OMSh type with internal amortization. Ground pressure was 0.73kg/cm2. Communications consisted of an R-113 radio and R-120 TPU laryngaphone. The tank was fitted with an SG-10 generator.
Trial and Failure
Two prototypes were built between 1958 and 1959, the first prototype being ready by December 1958 and tested from 7 January 1959 to 26 February 1960. An additional set of hull and turret armour was built for firing trials to determine armour integrity.
