HAL Tejas | Updates, News & Discussions

[EagleEyes]

Ok, so the super duper LCA. The worlds most advanced fighter. Is it flown by the kaveri engine yet? Did the super duper intelligent scientists of India were able to configure the fly by wire software? I am unknown to this.

Composite Tech etc

Stealth too?

Also Adux, what if i did show you that Chinese will acquire JF-17 even though i have mentioned that PLAAF has more than 1000+ aircrafts to replace, put up around 48% of effort in R&D and finance, and the list goes on.

Will you still deny?

 

[EagleEyes]

http://www.kanwa.com/dnws/showpl.php?id=96
http://mil.jschina.com.cn/huitong/J-10_J-11_FC-1.htm

Would you like to have your own Indian written on an indian website?

http://www.india-defence.com/specifications/fighters/14

Official Chinese Military website?

http://military.china.com/zh_cn/dljl/fc1/news/11045888/20070318/13994778.html

Now i want to scream, and repeat keyser quote in his sig.

"Never argue with an idiot; they'll drag you down to their level and beat you with experience."

 

[PakSniper]

300-500 times in PLAAF, source please; they hate the aircraft as far as I know.
I can see you are complelty uneducated on the LCA, Delays apart it is far ahead of Airforce's requirements. Composite Tech etc

Goodperson,

Weaponisation has just started, THe radar is Elta-2032 and as well as the Elta 2052.

Provide proof they hate the air craft, Arm Chair General, Sir.

If it was far ahead of AF requirements wouldn't they be then ordering the air-craft in large numbers, after 2 decades of research now you start weaponization, and on other hand you make fun of "thunder" which hasn't been weaponization, where now we are soon going to start it. I wonder how long will it take for the LCA probably another decade?

 

[Goodperson]

Provide proof they hate the air craft, Arm Chair General, Sir.

If it was far ahead of AF requirements wouldn't they be then ordering the air-craft in large numbers, after 2 decades of research now you start weaponization, and on other hand you make fun of "thunder" which hasn't been weaponization, where now we are soon going to start it. I wonder how long will it take for the LCA probably another decade?

I thought this was LCA news and Discussions thread stated by Webby,

Who made fun of "thunder" ? I agree JF-17 is a super duper Aircraft and kill any aircraft in IAF if that makes you happy.

 

[Goodperson]

Serial Production of LCA Tejas Fighter Jet Begins

The Aeronautical Development Agency's (ADA's) prestigious but delayed Light Combat Aircraft programme crossed another important milestone on Saturday with the first of the limited series production (LSP-1) aircraft successfully undertaking its low speed taxi trial.

The test will gladden the hearts of the LCA's end user - the Indian Air Force (IAF) - since the LSP aircraft are that much closer technically to the IAF's `SOP' (standard of production) requirements.

The low speed taxi trial which follows the completion of equally successful ground runs, is a key precursor to the aircraft's maiden flight, which engineers say could happen within a month. "All that is now left before the maiden flight is the clearance from the Safety Test Review Board and two high speed taxi trials."

Though the eight LSP aircraft, along with the two technical demonstrators (TDs) and five prototypes vehicles (PVs), are part of the LCA's flight test programme, they are just a step away from the actual series production aircraft which will fly in the IAF's combat squadrons. The LSP-1 is also the first LCA to be manufactured by the Aircraft Division of Hindustan Aeronautics Limited (HAL).

The LCA project got a boost in recent months with the IAF (that has placed an order for 20 aircraft worth approximately Rs. 2000 crore) steering the programme, engaging with both the design agency (ADA) and the manufacturing agency (HAL), and driving the certification process. The IAF's commitment was also evident when it selected the recently appointed Deputy Chief of Air Staff, Air Vice Marshal N.Anil Kumar Browne to head the LCA Review Group.

The IAF has decided to support the programme by posting a 14-member LCA Project Management Team to Bangalore that will be led by an Air Vice Marshal. The team, which will report directly to Air Head Quarters and have officers from the electronics, flying and mechanical branches, will according to sources "drive every aspect of the LCA programme to ensure that the LCA matures quickly into an operational platform".

However, according to sources the IAF has also made it clear to ADA and HAL that it will accept "nothing short of what it has contracted for." Among the critical areas that the IAF wants accelerated progress on are the digital flight control computer, the flight control system software, design changes to reduce the noise levels in the aircraft, availability of adequate number of line replacement units (to reduce cannibalising of spares between the existing aircraft), a lessening of the mean time between failures, and fitting of drop tanks. The LCA is probably the only programme where even after 638 sorties the drop tanks are yet to be fitted on the aircraft.

http://www.india-defence.com/reports/2942

 

[EagleEyes]

I thought this was LCA news and Discussions thread stated by Webby,

Who made fun of "thunder" ? I agree JF-17 is a super duper Aircraft and kill any aircraft in IAF if that makes you happy.

Dont copy. Super Duper Aircraft is reserved for LCA. Except for highlighting that you cant spell in your previous post, you still didn't answer.

Which components or parts of aircraft did India make instead of just putting it together, and calling it a R&D success?

The LCA is probably the only programme where even after 638 sorties the drop tanks are yet to be fitted on the aircraft.

Just keep flying the plane wont do anything. It will be vulnerable to thunder!

 

[Adux]

Yet, your own air force dont want it. Far ahead of getting operational is probably correct in that context.

They hated the aircraft thats why they spent 48% of Research & Development.

Therefore Initial Order for 20 is given, We have Detailed reports in ADA website, about the parameters achieved as well when they failed, As far as I know JF-17 only flies. Rest is all Internet jargon. Where did you hear Chinese are going to replace airframe for airframe. They spend 48% on it, so that they can shove it on 3rd world countries.

composites webby, in JF-17?
By surface area or Total weight do you have any information on that, We have detailed reports including a National Geographic Exclusive.

Engine is GE-404(Kaveri being developed) just like Rd-93(WS-13 beind developed) siutation, Which is what is used in Gripen, Radar is Elta 2032(LRDE developing one), Elta 2052 Aesa is being talked about, Cant confirm.Quadruplux FBW, Twin Seater already being built, Flight Hours of 700 hours. Ah then again LCA is Last Chance Aircraft. The strides LCA took in the last 5 years than that Failed MIg-33 Design

You have seen what I think of the Arjun- pathetic is not the word, LCA sorry way out of your league.

Now I have the capacity to accept, sorry I cant sit here and listen to all this stupid talk just because they are indian products

 

[Goodperson]

Dont copy. Super Duper Aircraft is reserved for LCA. Except for highlighting that you cant spell in your previous post, you still didn't answer.

Which components or parts of aircraft did India make instead of just putting it together, and calling it a R&D success?



Just keep flying the plane wont do anything. It will be vulnerable to thunder!

Can't you read my post where I said it was a spello.

 

[Lilo]

for people who want to know abt indigenous content of LCA

here goes..

Fly-by-wire Control Laws

One of the most ambitious requirements for the LCA was the specification that it would have "relaxed static stability." Although Dassault had offered an analogue FCS system in 1988, the ADA recognised that digital flight control technology would soon supplant it.[5] RSS technology was introduced in 1974 on the General Dynamics (now Lockheed Martin) YF-16, which was the world's first aircraft to be slightly aerodynamically unstable by design. Most aircraft are designed with "positive" static stability, which means they have a natural tendency to return to level and controlled flight in the absence of control inputs; however, this quality tends to oppose the pilot's efforts to maneuver. An aircraft with "negative" static stability (i.e., RSS), on the other hand, will quickly depart from level and controlled flight unless the pilot constantly works to keep it in trim; while this enhances maneuverability, it is very wearing on a pilot relying on a mechanical flight control system. What made RSS practical on the YF-16 was a new technology — the "fly-by-wire" flight control system — which employs flight computers to electronically keep the aircraft's instability in check whenever it is not desired.

Development of a FBW flight control system requires extensive knowledge of flight control laws and the expensive writing of a considerable amount of software code for the flight control computers, as well as its integration with the avionics and other electronic systems. When the LCA programme was launched, FBW was a state-of-the-art technology and such a sensitive one that India could find no nation willing to export it. Therefore, in 1992 the LCA National Control Law (CLAW) team was set up by the National Aeronautics Laboratory to develop India's own version. The CLAW team's scientists and mathematicians were successful in developing their control laws, but could not test them since India did not possess advanced real-time ground simulators at that time. Accordingly, British Aerospace (BAe) and Lockheed Martin were brought in to help in 1993, but the effort required for the Aeronautical Development Establishment to code the control laws into the FCS software proved a much larger job than originally anticipated.

Specific control law problems were tested on BAe's simulators (and on HAL's, once theirs became available). As it was being developed, progressive elements of the coding were checked out on the "Minibird" and "Ironbird" test rigs at the ADE and HAL, respectively. A second series of inflight simulation tests of the integrated flight control software were conducted on the F-16 VISTA (Variable In-flight Stability Test Aircraft) simulator in the U.S. in July 1996, with 33 test flights being carried out. However, Lockheed Martin's involvement was terminated in 1998 as part of an embargo enacted by the U.S. in response to India's second nuclear tests in May of that year.

The NAL's CLAW team eventually managed to successfully complete integration of the flight control laws indigenously, with the FCS software performing flawlessly for over 50 hours of pilot testing on TD-1, resulting in the aircraft being cleared for flight in early 2001. The LCA's maiden flight was made by TD-1 from National Flight Test Center(NFTC), near Bangalore, on 4 January 2001, and its first successful supersonic flight followed on 1 August 2003. TD-2 was scheduled to make its first flight in September 2001, but this was not achieved until 6 June 2002. The Tejas' automatic flight control system (AFCS) has been highly praised by all of its test pilots, one of whom said that he found it easier to take off with the LCA than in a Mirage [2000].[9]

Airframe
The LCA is constructed of aluminium-lithium alloys, carbon-fibre composites (CFC), and titanium-alloy steels. The Tejas employs CFC materials for up to 45% of its airframe, including in the fuselage (doors and skins), wings (skin, spars and ribs), elevons, tailfin, rudder, airbrakes and landing gear doors. Composites are used to make an aircraft both lighter and stronger at the same time compared to an all-metal design, and the LCA's percentage employment of CFCs is one of the highest among contemporary aircraft of its class.[34] Apart from making the plane much lighter, there are also fewer joints or rivets, which increases the aircraft's reliability and lowers its susceptibility to structural fatigue cracks.

The tailfin for the LCA is a monolithic honeycomb piece, an approach which reduced its manufacturing cost by 80% compared to the customary "subtractive" or "deductive" method, whereby the shaft is carved out of a block of titanium alloy by a computerized numerically controlled machine. No other manufacturer is known to have made fins out of a single piece. ...means we even innovated new concepts which never existed for other planes [35] A 'nose' for the rudder is added by 'squeeze' riveting.

The use of composites in the LCA resulted in a 40% reduction in the total number of parts compared to using a metallic frame. Furthermore, the number of fasteners has been reduced by half in the composite structure from the 10,000 that would have been required in a metallic frame design. The composite design also helped to avoid about 2,000 holes being drilled into the airframe. Overall, the aircraft's weight is lowered by 21%. While each of these factors can reduce production costs, an additional benefit — and significant cost savings — is realised in the shorter time required to assemble the aircraft — seven months for the LCA as opposed to 11 months using an all-metal airframe.[6]

The airframe of the naval variant of the Tejas will be modified with a nose droop to provide improved view during landing approach, and wing leading-edge vortex controllers (LEVCON) to increase lift during approach. The LEVCONs are control surfaces that extend from the wing-root leading edge and thus afford better low-speed handling for the LCA, which would otherwise be slightly hampered due to the increased drag that results from its delta-wing design. As an added benefit, the LEVCONs will also increase controllability at high angles of attack (AoA).

The naval Tejas will also have a strengthened spine, a longer and stronger undercarriage, and powered nose wheel steering for deck manoeuvrability.[11][36] The Tejas trainer variant will have "aerodynamic commonality" with the two-seat naval aircraft design.[37]

Landing gear

The Tejas has a hydraulically retractable tricycle-type landing gear with a pair of single inward-retracting mainwheels and a steerable, twin-wheel forward-retracting nose gear. The landing gear was originally to have been imported, but following the imposition of trade sanctions, HAL developed the entire system independently.

India's Nuclear Fuel Complex (NFC) led the team that developed the titanium half-alloy tubes that are used for hydraulic power transmission and they are critical components in the LCA. India is one of only six nations which have developed this technology, which also has space applications.[38]

Flight controls

Since the Tejas is a "relaxed static stability" design, it is equipped with a quadruplex digital fly-by-wire flight control system to ease handling by the pilot. The Tejas' aerodynamic configuration is based on a pure delta-wing layout with shoulder-mounted wings. Its control surfaces are all hydraulically actuated. The wing's outer leading edge incorporates three-section slats, while the inboard sections have additional slats to generate vortex lift over the inner wing and high-energy air-flow along the tail fin to enhance high-AoA stability and prevent departure from controlled flight. The wing trailing edge is occupied by two-segment elevons to provide pitch and yaw control. The only empennage-mounted control surfaces are the single-piece rudder and two airbrakes located in the upper rear part of the fuselage, one each on either side of the fin.

The digital FBW system of the Tejas employs a powerful digital flight control computer (DFCC) comprising four computing channels, each with its own independent power supply and all housed in a single LRU. The DFCC receives signals from a variety of sensors and pilot control stick inputs, and processes these through the appropriate channels to excite and control the elevons, rudder and leading edge slat hydraulic actuators. The DFCC channels are built around 32-bit microprocessors and use a subset of the Ada language for software implementation. The computer interfaces with pilot display elements like the MFDs through MIL-STD-1553B multiplex avionics data buses and RS-422 serial links.

Avionics


The Tejas has a night vision goggles (NVG)-compatible "glass cockpit" that is dominated by an indigenous head-up display (HUD), three 5 in x 5 in multi-function displays, two Smart Standby Display Units (SSDU), and a "get-you-home" panel. The CSIO-developed HUD, Elbit-furnished DASH helmet-mounted display and sight (HMDS), and hands-on-throttle-and-stick (HOTAS) controls reduce pilot workload and increase situation awareness by allowing the pilot to access navigation and weapon-aiming information with minimal need to spend time "head down" in the cockpit.

The MFDs provide information on the engine, hydraulics, electrical, flight control, and environmental control systems on a need-to-know basis, along with basic flight and tactical information. Dual redundant display processors produce computer-generated imagery on these displays. The pilot interacts with the complex avionics systems through a simple multifunction keyboard and function and sensor selection panels.

Target acquisition is accomplished through a state-of-the-art radar — potentially supplemented by a laser designator pod, forward-looking infra-red (FLIR) or other opto-electronic sensors — to provide accurate target information to enhance kill probabilities. A ring laser gyro (RLG)-based inertial navigation system (INS) provides accurate navigation guidance to the pilot. The LCA also has secure and jam-resistant communication systems such as the "identify friend or foe" (IFF) transponder/interrogator, VHF/UHF radios, and air-to-air/air-to-ground datalinks. The ADA Systems Directorate's Integrated Digital Avionics Suite (IDAS) integrates the flight controls, environmental controls, aircraft utilities systems management, stores management system (SMS), etc. on three 1553B buses by a centralised 32-bit, high-throughput mission computer.

Self-protection

An advanced electronic warfare suite enhances the Tejas' survivability during deep penetration and combat. The LCA's EW suite is being developed by the Defence Avionics Research Establishment (DARE) — which was known as the Advanced Systems Integration and Evaluation Organisation (ASIEO) until June 2001 — with support from the Defence Electronics Research Laboratory (DLRL).[8] This EW suite, known as "Mayavi" (Sanskrit: "Magician"), includes a radar warning receiver (RWR), self-protection jammer, laser warning system, missile approach warning system, and chaff/flare dispenser. In the interim, the Indian Defence Ministry has revealed that an unspecified number of EW suites have been purchased from Israel's Elisra for the LCA prototypes.[39]

The ADA claims that a degree of stealth has been designed into the Tejas. Being very small, there is an inherent degree of "visual stealth", but the airframe's use of a high degree of composites (which do not themselves reflect radar waves), a Y-duct inlet which shields the engine compressor face from probing radar waves, and the application of radar-absorbent material (RAM) coatings are intended to minimise its susceptibility to detection and tracking by the radars of enemy fighters, airborne early warning and control (AEW&C) aircraft, active-radar air-to-air missiles (AAM), and surface-to-air missile (SAM) defense systems.

MAYAVI EW system and btw our MAYAVI is going to be incorporated in Israeli F35 and what else does any one need to prove that some of our systems are world class..??

The scientist said this venture will see an advanced EW system called MAYAVI developed for India’s Light Combat Aircraft (LCA) and F-35 Joint Strike Fighters that Israel plans to buy from the United States.

The EW system will feature advanced radar warning, radar jamming, and electronic combat and self-protection systems. It also will have an Integrated Defensive Electronic Radio Frequency Countermeasures system to help protect the LCA against radar-guided missiles.

A consortia of nuclear and defence entities led by the Nuclear Fuel Complex (NFC), here have developed titanium half alloy tubes, a key materials component that would both accelerate the project and reduce production costs of the light combat aircraft (LCA)-Tejas.

Used for hydraulic power transmission, these titanium tubes also find application in space, especially the geosynchronous satellite launch vehicle (GSLV) of the Indian Space Research Organisation (ISRO).

India would be among a group of half a dozen nations, now with the capability to produce these tubes indigenously. The other countries include, the US, the UK, France, Russia and Germany.

Escape systems
To improve pilot safety during ejection, the Armament Research and Development Establishment (ARDE), Pune, India created a new line-charged canopy severance system, which has been certified by Martin-Baker. This system, which is the first of its kind, can be operated from outside the aircraft, an important consideration when the pilot is trapped or unconscious.

The probable non-indigenous content in LCA is its radar ,engine and may be some of its armaments.

webby how abt some comments on this.... especially since you were sayin that LCA was an "assembled" Aircraft
with minimal "indigeonous"...oops....i meant "indigeous"..... "content" oops again...err i meant "components"
.

 

[zeus]

guys even Radar will be indian soon ,being co-admin of www.lca-tejas.org i wanted to clear some points here

RADAR : Tejas PV-1,2,3&5 will get Elta's 2032 radar which is a interim radar ,and Tejas Lsp-3 which will fly by august or September 2007 will get Desi MMR radar ,almost two dozen MMR have been produced till now and further development of Aesa version of MMR radar has begun and will incorporate into Tejas by 2010-11

Not liked by air force ?? :Air force has a dedicated team for induction of tejas into air force and a senior Air force official who was looking after the induction of Sukhoi su 30 mki in indian air force has been assigned this job now to see the induction of tejas in indian air force
link here
http://www.idrw.org/index.php?categoryid=1&p2_articleid=534

Requirements have gone up : it was earlier decided to induct only 150 to 200 tejas and now the number will be touching 250 to 300 ,air force technicians have already working on tejas instead of ADA technicians

 

[Owais]

I thought this was LCA news and Discussions thread stated by Webby,

Who made fun of "thunder" ? I agree JF-17 is a super duper Aircraft and kill any aircraft in IAF if that makes you happy.

Dont get emotional sir. its a fact that Thunder can get every IAF jet even MKI when its backed by AWACs or within country's space.

for people who want to know abt indigenous content of LCA

here goes

link please

 

[zeus]

and also a naval pilot has been flying tejas for some time and First N-lca NP-1 will take to air by 2008 and will carry out carrier landing trials from 2009

 

[zeus]

for which components do you want to know Owais ? since many of the components are developed by different labs and defence establishment ,which one you want to know ?

 

[zeus]

here are some but will keep updating the list

# An indigenous Head Up Display (HUD) replaces the imported HUD. The new HUD, developed by CSIO, Chandigarh, has a larger field of view, three times the brightness, higher redundancy and is noiseless since the design does not call for a cooling fan.
# An indigenous single LRU Integrated Communication System (INCOM) replaces a three LRU INCOM in LCA-TD1. The new INCOM developed by HAL , Hyderabad is a second generation software based system with significant weight saving (17 Kg), reduced volume(43% of original volume), and improved system performance and reliability.

* Mission Computer(MC): MC performs the central processing functions apart from performing as Bus Controller and is the central core of the Avionics system. The hardware architecture is based on a dual 80386 based computer with dual port RAM for interprocessor communication. There are three dual redundant communication channels meeting with MIL-STD-1553B data bus specifications. The hardware unit development was done by ASIEO, Bangalore and Software Design & Development by ADA.
* Control & Coding Unit (CCU): In the normal mode, CCU provides real time I/O access which are essentially pilot's controls and power on controls for certain equipment. In the reversionary mode, when MC fails, CCU performs the central processing functions of MC. The CCU also generates voice warning signals. The main processor is Intel 80386 microprocessor. The hardware is developed by RCI, Hyderabad and software by ADA.
* Display Processors (DP): DP is one of the mission critical software intensive LRUs of LCA. The DP drives two types of display surfaces viz. a monochrome Head Up display (HUD) and two colour multifunction displays (MFDs). The equipment is based on four Intel 80960 microprocessors. There are two DPs provided (one normal and one backup) in LCA. These units are developed by ADE, Bangalore
* Mission Preparation & Data Retrieval Unit (MPRU): MPRU is a data entry and retrieval unit of LCA Avionics architecture. The unit performs mission preparation and data retrieval functions. In the preparation mode, it transfers mission data prepared on Data Preparation Cartridge (DPC) with the help of ground compliment, to various Avionics equipment. In the second function, the MPRU receives data from various equipment during the Operational Flight Program (OFP) and stores data on Resident Cartridge Card (RCC). This unit is developed by LRDE, Bangalore.
* USMS Electronic Units: The following processor based digital Electronics Units (EU) are used for control and monitoring, data logging for fault diagnosis and maintenance.
o Environment Control System Controller (ECSC)
o Engine and Electrical Monitoring System Electronics Unit (EEMS-EU)
o Digital Fuel Monitoring System Electronics Unit (DFM-EU)
o Digital Hydraulics and Brake Management System Electronics Unit (DH-EU)
* V/UHF Equipment: V/UHF equipment is a secure jam resisant airborne radio communication set which provides simplex two way voice and data communication in the VHF and UHF frequency bands. This unit is developed by HAL, Hyderabad.
* Multi Function Keyboard (MFK): MFK is an interfce for pilot dialogue concerning certain selected equipment of Avionics system. It comprises LCD panel, alphanumeric keys, push buttions for power ON / OFF and LEDs indicating power ON / OFF status of certain Avionics equipment. This unit is developed by BEL, Bangalore.
* Head Up Display (HUD): HUD is of conventional type with a Total Field of View (TFOV) of 24 degrees circular. A Change Coupled Device (CCD) based camera is mounted on the HUD for recording purposes. HUD dsplays various navigation and weapon related data. This unit is developed by CSIO, Chandigarh.
* Colour Multi Function Displays (MFDs): LCD based colour MFDs hava a useful screen area of 125 mm x 125 mm. They have soft keys around their periphery for interaction with the systems. This display provides various aircraft system pages and navigation pages in addition to RADAR & FLIR display.


The development effort for the LCA is lead by ADA. Apart from govt labs and agencies, many educational institutes and private companies also have a role. A list of some of the government agencies involved in the LCA and MCA projects:

* Aeronautical Development Agency (ADA)
* Aeronautical Defense Establishment (ADE)
* Defense Research and Development Organisation (DRDO)
* Hindustan Aeronautics Limited (HAL)
* National Aerospace Laboratries (NAL)
* Gas Turbine Research Establishment (GTRE)
* National Test Flight Centre (NTFC), Hosur (near Bangalore)
* Electronic Radar Development Establishment (ERDE)
* Council for scientific and Industrial Researh(CSIR)

Some of the people associated with LCA development:

* ADA Programme Director: M.B.Verma
* Programme Director,NFTC: Air Marshal Philip Rajkumar
* Project Director,General Systems: K.G. Vivek
* K.V.L.Rao, Project Director,Propulsion Systems
* T.G.Pai, Project Director,Technology Development, LCA Navy
* M.B.Verma, Project Director, General System
* Director-General, Aeronautical Development Agency (ADA): Vasudeva Aatre
* Test/Chase Pilots: Wing Commander Rajiv Kothiyal, Wing Commander R Nambiar, Wing Commander Banerjee
* Director, National Institute of Advanced Studies: Roddam Narasimha(chairman of the committee that reviewed the LCA in 1990)
* HAL Chairman: C.G. Krishnadas Nair
* NID LCA Team Leader: Dr S Ghosal
* Head of Advanced Composites Unit,NAL: M.Subba Rao
* Director-General (CSIR): Dr R.A Mashelkar

 

[zeus]

LCA Avionics architecture is configured around a three bus system (MIL-STD-1553B) in a distributed environment. The heart of the system is a 32-bit Mission Computer (MC) which performs mission oriented computations, flight management, reconfiguration / redundancy management and in-flight system self-tests. In compliance with MIL-STD-1521 and 2167A standards, Ada language has been adopted for mission computer software.Accurate navigation and guidance is realised through RLG based Inertial Navigation System (INS) with provision for INS / Global Positioning System (GPS) integration. Jam resistant radio commumication system with advanced Electronic Warfare (EW) environment. In the EW suite, Electromagnetic and Electroptic receivers and jammers provide the necessary "soft-kill" capability.the mission computer has been replaced by another indian OAC computer , software has been written by ada