Modernizationof Su-25 aircraft

Focus Areas of Modernization

Extension of the air-launched weapons list

Installation of live monitoring and recording system

Installation of SN-25 navigation system

Introduction of“navigation bombing” mode

Modernization of cockpit instrumentation and installation of SOI-25 data display system

Installation of EMI shielding equipment

Installation of PS-25 targeting system

Installation of SR-25 radio communications system

Purposes of modernization

• Improvement of combat efficiency of the aircraft equipment in warfare for destruction ofground and airborne targets by means of in-depth modernization of the targeting system,introduction of new modes of its operation and use of R-73, S-13 unguided air missiles,KAB-500Kr (L), Х-29Т (ТЕ) and installation of EMI shielding equipment «Satellite» (option).

• Enhancement of combat capabilities of the aircraft in conduct of high intensity warfareround the clock and in all weather conditions, of mission area - as intended, is achieved bymeans of advanced satellite transmission facilities, new modes of navigation andprincipally new software of a navigation target acquisition system.

Extension of the air-launched weapons list

The aircraft is upgraded for installation and employment of new types of air-launched weapons and mounting new equipment in technical compartments.

Newly installed weapons

R-60R-73

Х-25МLХ-29LХ-29ТS-25(L)LD

S-5, S-8, S-25S-13

КАB-500КrКАB-500L

AB-100/250/500 kgRBK-250/500 kgЗB-500KMG-U

«Satellite» («Veresk»)

Guided «air-to-air» missiles

Unguided air-launched missiles

Air bombs

EMI shielding equipment

Guided «air-to-surface» missiles

Guided air bombs

Equipment Configuration, Structural Diagram of Modernized Su-25(UB) Airborne Avionics

PUS-29M№ 2

UVV

-MG

№1

UVV

-MG

№2

“YDRO-25”

SOI-25 (UB)BKTV-M

GS-MILS-31M1 cocpit

IRP-5 №1

VK

VN

2 cocpit

MFI-10№ 2

VN

VN VN

MFI-10№ 1

MFI-10№ 1

MFI-10№ 2

IRP-5 №2

SVR-12

Системы самолёта

BUR-4-1

“METKA”

C-17BC-8

PS-25

SPU-9

“KLEN-PS”

UVV

-MG

№3 SUO 8PA

Штатное АСП

SUO-25

BKS-73

TV signal

BA-25

BPZ-73

SO-96

Органы управления

BKK-P

Additional airborne weapons: R-73,X-29T(TE),KAB-500Kr(L),S-13

BRK-

46

№2

IKV-1

BUP-25

BRK-92

A-317-003

BRK-46 № 1

SNS

SN-25

L006-PM

“SATELLIT”UUAP-72M-1

SVS-1-72M-1

SZD-M

SPAD-2I

ARK-22

R-862RC

ARK-22

BKU-25-2

RCR-862 VND-94

One-off commands

Analog signals

ARINC-429 lineMIL-STD—1553B line

STR-5-3

BUR-4-1

DISS-7

458M

A-031

Audio signal

Layout of the newly installed equipment

MIL-STD-1553B line

ARINC-429 line

Analog line

Newly installed and removed equipment

Removed equipment Newly installed equipmentCockpit

Sight head S-17VG Head-up display ILS-31МHorizontal situation indicator PNP-72-12

Multipurpose indicatorMFI-10 – 2 pcs.

Flight director indicator KPP-1273-КIMultipurpose device DА-200PRadio altimeter indicator А-031-4Range indicator PPD-2Photo control device SSh-45

Video recording system SVR-12Film camera АКS-75

Aircraft compartments

Aerogun-sight ASP-17BTs-8

Targeting system PS-25Short-range radiotechnical navigation system RSBN-6S(partially)

Flight data recorder system «Tester-U3»Emergency quick-access recorder BUR-4-1-10

Airborne tape-recorder МS-61М

Rest of the equipment and on-board cable system will undergo the overhaul in the scope of regular overhaul of Su-25 aircraft.

КТ-12

PUS-29

Modernization of cockpit instrumentationMounting of information display system SOI-25

IRP-5 provides standby recoding of the following information: bankangle, pitch attitude, intended heading, sideslip, absolute andrelative barometric altitude, vertical and indicated speed,M-number;

ILS-31М provides displaying of flight navigation and aiming information (indicated air speed, barometric altitude, geometric altitude, heading scale,current course, aircraft symbol, angle-of-attack scale, rate-of-climb dial, pitching line, bank angle scale, «Klen-PS» station range scale, aiming mark of«Klen-PS» station).

MFI-10 provides displayingof flight navigationinformation: indicatedspeed, actual speed,barometric altitude,geometric altitude, M-number, vertical speed,current angle of attack,incidence limit, currentoverload, bank, pitching,current heading, intendedheading, angle of drift, glide-scope and on-course sector,azimuth and radio stationheading angle.

MFI-10 provides:• display of aiming information

(television image from a TVseeker of the air-launchedweapons, allowable zones ofrelease (launch) by rangeand azimuth, current targetrange, «launch is allowed»command»);

• control of indication modesand airborne systems;

• Input of information into theairborne data base onnavigation points (waypoint,aerodrome, radio beacon,locator beacon) and routes.

Installation of SN-25 Navigation System

SN-25 PROVIDES:• input and storage of data on waypoints, aerodromes, radio-beacons – up to 99 points of each type (in the standard version – up to 6

points);• generation and storage of the data on 8 routes(in the standard version - 1 route);• desired track flight with automatic and manual change of navigation points in flight;• Navigation capability under ICAO standard (VOR, ILS/DME);• Accuracy of aircraft position coordinates ±15 meters (in the standard version 700 meters).

Window displaying values of true airspeed (Vи) and ground speed(W)

Window displaying values of relative height (H)

Corrective system letter character

Names and parameters of the current navigation point: Ψ – course to a waypoint; Д – distance to a waypoint; Z – cross-track deviation; Т – flying time up to a waypoint.

Flying time

Selected course symbol

Bearing arrow (NP)

Window of the current navigation point (NP)

Window with names of reference points

Imaging on the MFI-10 screen in the navigation mode

Improving navigation accuracy up to 15 m

Installation of SN-25 Navigation System

VIM-95 equipment is designed for operation with radio beacons of short-rangenavigation system - VOR and radio beacons of aircraft instrument landing systems- ILS, SP-50.The equipment outputs azimuth data to radio beacon VOR and data on landinglocalizer and glideslope deviation via ILS and SP-50 systems in digital and analogform. The equipment generates marker beacon passing signals as well.

VIM-95 consists of heading, glideslope and marker receivers.

Installation of aircraft navigation and landing equipment VIM-95

Appearance of the device

VND-94 is designed for measurement of slant range distance between the aerialvehicle and ground-based radio beacons DМЕ/Р, DМЕ/N (DМЕ/W) and radiobeacons of TACAN system. It can operate in scanning mode with 5 beacons.Small-size radio range-finder VND - 94 consists of interrogator, ISD-3 indicator andАМ-001 antenna.

Installation of small-size radio range-finder VND-94

Appearance of the device

Installation of PS-25 Targeting System

PS-25 ensures employment of organic air-launched weapons and newly installed ones:• R-73 «air-to-air» guided missiles;• управляемых ракет Х-29Т «air-to-surface» guided missiles;• КАB-500Кr guided air bombs;• S-13 unguided air missiles;• PS-25 also provides employment of «navigation bombing» mode.

Use of Х-29Т guided missiles КАB-500Кr guided bombs

Introduction of «navigation bombing» mode provides:• carrying out day-and-night bombing of freefalling air bombs in

all weather conditions, without ground surface visibility;• increase of maximum bombing altitude up to 5000 m (not

entering in air defence engagement zone);• Improving accuracy of freefalling bomb-dropping (RMS error

±30 m).

Image from Х-29ТКАB-500Кr homing head

Image from Х-29Т homing head

Modernized Su-25(UB) aircraft

Roland-2 SAM system

GuepardVolcano AA system

Stinger Chaparral SAM systems

Damage envelope from the tactical Air Defencesystem

I-frames displayed on МFI-10 screen

Navigation data display mode

I-frames of external environment through ILS-31М

Installation of Live Monitoring and Recording Systems

The system is designed for in-flight video and audio information recording for carrying out live monitoring and post flight analysis.

TV camera КТ-12Interface unit

BS-12Removable

storage drive NS-12

Video recording of the external environment and ILS-31М information

Flight data display mode

Control and flight data recording system BUR-4-1-10 is designed for control, recording and storage, in case of emergency, ofinformation on status of power units and airborne systems.Control and flight data recording system provides the following:• Flight data reading and transfer to the ground data processing system;• carrying out of technological and calibration works on site;• rapid analysis of flight information;• voice information reproduction;• in-depth control testing of BUR-4-1-10 system as a part of the aircraft;• data processing results documentating.

«Dvina-М» ground software system is used for data reading and processing, rapid analysis of in-flight recorded parameters and theirvisualization.

Installation of Live Monitoring and Recording Systems

Appearance of the device

BUR-4-1-10 system includes:• data collection unit BSI-4-10;• solid state recording unit BR-4Т-10;• control unit BU-10;• control panel PU-4-10.

Installation of SR-25 Radio Communications System

SR-25 radio communications system

The on-board communications complex is designed to provide anti-jam unsecure and secure telephone and tele-code radiocommunications while interacting with other aerial vehicles and ground-based control posts.

THE COMPLEX PROVIDES:• Two-way simplex unsecure and secure radio communication of a crew through two independent communications channels

within VW-UHF band and through one channel within HF-band with ground-based control posts and other aerial vehicles,equipped with devices providing full-duplex operation;

• automatic voice information relay within MW-UHF band in FOF and PROFR modes;• emergency voice announcement of the crew;• two-way internal telephone communications between the crewmembers in flight and with ground maintenance staff during

preflight preparation;• data exchange with airborne avionics equipment through multiplex data-exchange channel (GOST 52070-2003);• data exchange with airborne avionics equipment though sequenced exchange channel in accordance with GOST18977-79;• listening signals of automatic radio compass, radio navigation equipment, special signal sensors, emergency receiver of either of

the two radio stations within MW-UHF band;• recording telephone conversations of the crewmembers via internal and external communications links by using voice recorder;• automated input of communication plan (preflight data) from external medium;• control of radio stations in automatic mode (with PU-29 as a part of airborne avionics equipment).

«Prima-DMV» radio station

«Prima-DMV» radio stationMW1-MW2-UHF band radio station («Prima-DMV») is designed to provide short-range telephone radio communication within the following frequency bands • (30–87,975) MHz – 25 kHz frequency spacing;• (100–149,975) MHz – 25 kHz frequency spacing;• (156–173,975) MHz – 25 kHz frequency spacing;• (220–399,975) MHz – 25 kHz frequency spacing;• (118,0–136,975)MHz– 8,33 kHz frequency spacing.

Installation of EMI Shielding Equipment (EMI SE “Satellite”)(«Veresk»)

Phase of surveillance

False target acquisition and tracking

During operation of jammed radio electronic means insurveillance mode, the equipment causes maskinginterference in the channels of range, speed and angularcoordinates. Selection of a true mark among false ones ishampered.

In tracking mode the equipment provides generation ofcontrollable disturbances in the channels of angularcoordinate measuring. Antenna of radio electronicmeans switches to tracking of a false target, located inother direction relatively the protected aerial vehicle.Angular position of a false target changes by desired law,simulating maneuvering of the protected aerial vehicle.

EMI ShE «SATELLITE»

The option of positioning the system in 2 suspended containers is offered for Su-25 aircraft.

Turn-out

WARHEAD TYPE AND WEIGHT

HE penetrating, 150 kg

Х-29Т short-range missile

It is intended for defeat of visible difficult-to-attack groundand surface targets (reinforced concrete shelters forairplanes, industrial constructions and warehouses,concrete take-off runways, concrete bridges, ships withdisplacement of up to 10 thousand tons) from ahorizontally flying or diver aircraft-carrier.It is equipped with a passive TV homing head.

Basic performances

Max. range of aiming launch, km 10

Weight of a missile, kg 670Dimensions, m:

length 3,87caliber 0,38

Launching Х-29Т missile(air attack simulation)

Entering the target area

Launch

Turn out

Autonomous flight of bomb

Visual detection of the target area on radar

Preliminary targetingon MFI in a large field

Precise targeting on MFI in a small field

Turn-out

KAB-500KR guided air bomb with a TV homing head

It is intended for defeat of a wide range of ground and above-water stationary targets, including solid and low-contrast ones (concealed targets, which position relatively surrounding landmarks is known) with realization of a principle «dropped–and-forgot». The warhead breaks through a concrete obstacle o width up to 1,5 m and penetrates into ground to a depth of up to 10 m.

Basic performances

Max. range of bombing, km 9,0Weight of a bomb, kg 525Warhead high-explosive concrete-piercingDimensions, m:

length 3050caliber 350

Altitude rangeНсбр. = 500.....5000м

Warhead weight М = 380hw.kgLaunch range 2000.....9000м

Visual detection of the target area

on radar

Preliminary targetingon MFI in a large field

Precise targeting on MFI in a small field

Entering the target area

Launch

Turn out

Autonomous flight of bomb

KAB-500L guided air bomb with a laser homing head

It is intended for defeat of a wide range of ground and above-water stationary targets, including solid and low-contrast ones (concealed targets, which position relatively surrounding landmarks is known). The warhead breaks through a concrete obstacle of width up to 1,5 m and penetrates into ground to a depth of up to 10 m.

Basic performances

Max. range of bombing, km 9,0Weight of a bomb, kg 534Warhead high-explosive;

fuel-air explosiveDimensions, mm

length 3050caliber 400

Altitude range

Нсбр. = 500.....5000м

Warhead weight WhW. = 300kg

Drop range 2000.....9000м

KAB-500L guided air bomb with a laser homing head

(Option 2)

(Option 1)

(Option 4)

(Option 3)

S-13 (Т, D, OF)unguided air missiles

S-13Caliber, mm 122Type of warhead penetration;

high-explosive-fragmentationActive flight time, s 1,8-2,4Range of fire, km 1,1-4Length of a rocket, mm 2634Weight of a fully loaded rocket, kg 60

Basic performances

S-13ТCaliber, mm 122Type of warhead penetration;

high-explosive-fragmentationActive flight time, s 1,8-2,4Range of fire, km 1,1-4Length of a rocket, mm 2990Weight of a fully loaded rocket, kg 75,0

S-13OFCaliber, mm 122Type of warhead high-explosive-fragmentationActive flight time, s 1,8-2,4Range of fire, km 1,1-4Length of a rocket, mm 2975Weight of a fully loaded rocket, kg 69

S-13DCaliber, mm 122Type of warhead high-explosiveActive flight time, s 1,8-2,4Range of fire, km 1,1-4Length of a rocket, mm 3100Weight of a fully loaded rocket, kg 54