M-84 TFCS3

_YugoSlav · July 20, 2023, 5:09am

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M-84 TFCS3

History and Description

In 1996, Slovenian company Fotona presented for the first time their new TFCS3, “two-headed” FCS for the M-84/72 tanks to potential users. Its prototype was installed in M-84 tank no. 10135 from the 54th Armored Mechanized Battalion (54. OKMB). In addition to the M-84/72 series, the system can also be installed in all other tanks from the Soviet “T” family and in related tanks.

The upgrade included several new features the most notable being the gunner’s thermal sight, laser warning receiver, and commander’s takeover set. TFCS3 FCS package consists of SGS-84T, STIGS gunner sights, and FCC-84T computer. Although modular, the system’s structure is jointly calibrated and works as a whole, while each module can also work individually. The user can therefore choose whether to use the entire system or only individual modules. The second advantage of modularity is the easy interchangeability of system components. Third, when one module is destroyed, the other remains operational. All functions except aiming, turning on the laser rangefinder, and selecting ammunition are automated.

SGS-84 is a stabilized gunner sight with integrated day and passive night channels. It is also part of the EFCS3 fire control system, which is installed in large numbers on Slovenian M-84 and Croatian M-84A4 Snajper tanks. Right next to the SGS-84 sight is the STIGS sight with an integrated thermal channel. Unlike its “neighboring” sight it doesn’t have an eyepiece, but a screen. In addition to FCS improvements, M-84 TFCS3 received a LIRD-3A laser warning receiver, CODRIS-E driver’s sight, and COMTOS commander’s takeover set which gave the tank hunter-killer capability. The device consists of a miniature camera inside the SGS-84 gunner’s sight and control panel with a monitor that attaches under the existing DNKS-2 commander’s periscope.

Added systems:

SGS-84T - Stabilized Gunner Sight
COMTOS-84 - Commander Take Over Set
CODRIS-84E - Combined Day/Night Driver Sight
LIRD-3A - Laser Irradiation Detector
FCC-84T- Fire Control Computer
STIGS-84 - Stabilized Thermal Imaging Gunner Sight
MRS-84 - Muzzle Reference System

Specifications

Essentials
- Length; 6.86 m
- Width; 3.57 m
- Height; 2.19 m
- Mass; 41 t
- Crew; 3
  - Driver; day and passive night sight (CODRIS-E, PNK)
  - Commander; day and passive night sight (TPKU-2B) + ability to use gunner’s sight
  - Gunner; day and passive night sight (SGS-84T) + thermal sight (STIGS)
Protection
- Armor; M-84/T-72M armor
- APS; N/A
- ERA; N/A
- Smoke; 12 x BDK M79 smoke grenades, ESS
Mobility
- Engine; V-46-6 780 hp
- Power/weight; 18.8 hp/t
- Top speed; 60 kph
- Amphibious; No
Firepower
- Main; 125 mm 2A46 smoothbore gun
  - Reload; 7.1 s
  - 44 rounds in total
  - Stabilizer; Two-plane stabilizer
  - Vertical; -6° / +13°
  - Horizontal; 360°
  - Turret rotation speed; 20°/s
- Secondary; 7.62 mm M86 machine gun
  - Penetration at 10 m; 10 mm
  - Fire rate; 700 shots/min
  - Belt capacity; 250 rounds
- Supplementary; 12.7 mm M87 machine gun
  - Penetration at 10 m; 38 mm
  - Fire rate; 700 shots/min
  - Belt capacity; 60 rounds

Gallery

LIRD-3A laser warning receiver behind MES-84 meteorological sensor on telescopic support

Close-up of TFCS3 with STIGS (thermal channel) on the left and SGS-84 (day and passive night channel) on the right. The sights are missing their protection cap