Up-to-date fire control system with over-ride facilities at the commander's station
The upgraded T-55AGM tank is fitted with an up-to-date weapon-and-fire
control system, which enables the gunner and the commander to deliver
fire at stationary and moving targets while the tank is stationary or
moving, with a high first round hit probability.
The weapon-and-fire control system comprises gunner's 1K14
day/night sight, PTT-M thermal imaging sight with MATIS thermal
camera developed by the SAGEM company, commander's PNK-4S
observation and sighting system, PZU-7 anti-aitcraft sight, 1Ets29M
anti-aircraft machine gun control system, LIO-V ballistic computer
with input sensors, 2E42 armament stabiliser, and other devices.
The gunner's 1K14 day/night sight is provided with a two-axis
stabilised line-of-sight, a built-in laser range-finder and a missile
guidance capability (laser channel). The sight is also provided with
an automatic compensation for gyro drift. The sight field-of-view has
a magnification of x10.
The built-in laser range-finder makes it possible to measure target
ranges up to 9990 m with accuracy of 10
metres. The measured range is displayed, together with ready-to-fire
light and loaded ammunition type indication, in the lower part of
the gunner's sight field-of-view.
The PTT-M thermal imaging sight consists of a gunner's optronic
instrument, monitor and commander's control panel. The thermal
imaging sight enables the gunner and the commander to detect targets
and deliver fire (commander - in the override mode) at targets
under almost all weather conditions at high distances and with a high
accuracy (this ability is a big advantage when operating under
conditions of poor visibility or at night). The thermal imaging sight
also makes it possible to disregard a number of common obscurants,
such as smoke, battlefield light bursts, etc.
The commander's PNK-4S observation and sighting system comprises a
commander's TKN-4S combined day/night sight and a gun position
sensor. The commander's TKN-4S combined sight is provided with
a vertically-stabilised line-of-sight and three channels: unity
vision day channel, magnified day channel with a degree of
magnification of x7.6 and night channel with a degree of
magnification of x5.8.
The anti-aircraft sight enables the commander to fire at
air targets from the anti-aircraft machine gun from within the turret
under complete armour protection.
The LIO-V ballistic computer is intended for computation of ballistic
corrections. The computer automatically allows for the signals coming
from the following sensors:
- tank speed sensor
- target angular speed sensor
- gun trunnion axis tilt sensor
- crosswind sensor
- target range sensor, and course angle sensor.
Additionally, the following parameters are manually input for calculations:
- ambient air temperature
- charge temperature
- gun barrel wear
- ambient airpressure, etc.
Turret traverse is electric while gun elevation is hydraulic. Gun and turret
manual controls are provided for emergency use.
The specific feature of the tank consists in
availability of guided weapon system, which makes it possible to fire
laser beam-riding guided missiles from the main gun and engage
targets at distances of up to 5,000 m with a hit probability of at
least 0.8. The guided weapon system also enables the tank crew to
engage hovering helicopters that can fire at tanks from a distance
exceeding the maximum firing range of conventional tank ammunition.
Guided missile can be fired from the moving tank at a moving target. The
missile is provided with a tandem warhead to defeat targets protected
by explosive reactive armour or modern composite armour with enhanced
protection ability against chemical energy ammunition.
Machine gun can be fired either from the gunner's station or the
commander's station.
The offered modernisation ensures the following:
For the gunner:
- increase of effective fire range by day and at night of up to 2,400-2,600 m
while the tank is stationary or on the move;
- increase
of target detection range at night up to 8,000 m due to installation
of PTT-M thermal imaging sight;
- reduction
of the first shot preparation time down to 5-8 seconds;
- target
ranging by day of up to 5,000 m with probability of 0.9 de to use of
a laser range-finder provided with an amplitude-time selection
capability;
- firing
a guided missile at distances of up to 5,000 m with a target hit
probability of 0.8.
For
the gunner:
- firing
the main gun in the over-ride mode on the move by using the TKN-4S
sight at targets at distances of up to 1,700 m and firing the
coaxial macjhine gun at targets at distances of up to 1,800 m;
- firing
in the over-ride mode by using the thermal imaging sight monitor at
distances of up to 2,400-2,600 m;
- firing
the anti-aircraft machine gun on the move from within the turret
under complete armour protection at distances of up to 2,000 m at
ground targets and low-flying air targets;
- increase of target detection range:
- by day - up to 5,000 m;
- at night - up to 700 m (by using TKN-4S sight); 8,000 m (by using PTT-M thermal imaging sight);
- high-accuracy target designation to the gunner.
The upgraded T-55AGM tank is fitted with communications means, which include
- an ultra-short wave R-173M radio set
- crew intercom system.
Technical characteristics of the communications means
| Radio set ultra-short wave, receiving/transmitting |
| Model |
R-173M |
| Working frequency range (kHz) |
30,000-75,999 with interval of 1 kHz |
| Number of pre-selected frequencies |
10 |
| Radio coverage in cross-country
on interference-free frequencies by using a 3-metre whip aerial (km) |
20 |
| Crew intercom system |
| Model |
AVSK-1 |
| Number of parties |
4 (including tank-borne infantry telephone socket) |
| Crewmember helmet |
ShSh-1 |
| Number |
4 |
|
|
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