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Originally posted by longbow
What's Tejas? It's LCA?
The production Kaveri, with a reheat thrust of 20,200 lbs. (90kN), will be more powerful than the 17,000 lbs Snecma M88-2 now powering the twin-engined Rafale. It matches the output of the uprated M88-3. GTRE says the version of the Kaveri will have a turbine entry temperature of 1 ,8500 C and single-crystal turbine blades being developed by GTRE with the Defence Metallurgical Research Laboratory. Directionally solidified blades are now used. The new variant, which India says will be at the technology level of the M88-3, will have a fan pressure ratio of 4:1 and an overall pressure ratio of 27:1. A new combustor will be shorter and lighter than the present unit.
The increased, dry thrust should allow the aircraft to supercruise (cruise supersonically without the use of reheat). Also under development is a thrust-vectoring nozzle, to enhance its agility, as well as a digital engine control system. The axisymmetric TV nozzle is planned to be flight tested on a later prototype. Plans are already under way for derivatives of the Kaveri; a non-afterburning version for an advanced jet trainer, a high bypass-ratio turbo fan based on the Kaveri core, as well as variants for other applications.
IAF to procure 126 LCAs by 2010
Panaji, Nov 26. (PTI): Indian Air Force is in the process of procuring 126 light combat aircraft (LCA) by 2010, Air Chief Marshal S P Tyagi said here.
"The aircraft would be procured towards the end of this decade and no specific deadline is set for it," Tyagi told reporters during a ceremonial passing-out parade at INS Mandovi, Goa. full article >>
Span = 8.2 m
Length = 13.2 m
Height = 4.4 m
Empty Weight = 5500 kg
Max take off weight = 12,500+ kg
Type > Single-seat light weight all-weather multi-role air superiority Fighter
Aerodynamics > Tail-less Compound delta planform with relaxed static stability
Powerplant >One Kaveri turbofan engine of 81kN thrust with FADEC (TVC planned and in development)
Prototypes and LSP's use F-404's
Airframe > Materials include Aluminium - Lithium alloys , Titanium alloy and Carbon compositites. Composities for wing (skin , spars and ribs ) fuselage (doors and skins), elevons, fin, rudder, airbrakes and landing gear doors. More than 45% of the total materials used are composites (arguably the highest for any airplane till date)
Sensors > Multimode pulse Doppler with multitarget search, track-while-scan and ground mapping. Also included are Radar Warning Receiver, Laser Warning Receiver, Missile Approach Warner, new generation IRST, Lightening Laser Designation Pod, Friend/Foe identification system, Tarang HADF/SIVA pod.
Cockpit > Glass cockpit with two Multi Function Displays, Head-Up Display , Multi Function Keyboard and Get-You-Home Panel , Hands on Throttle and Stick (HOTAS)
Avionics > Configured around three MIL-STD-1553B digital data buses, 32 - bit mission computer with software written using ADA language, 32-bit Mission Computer (MC) (which performs mission oriented computations, flight management, reconfiguration / redundancy management and in-flight system self-tests). 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, Integrated Digital Avionics Suite (characterised by its interface with all other aircraft systems such as Utility Systems Management System (USMS), Proplsion System, Electrical System and Flight control System) 8kb/second datalink, Full Glass cockpit
Flight Controls > Quadruplex Digital Fly-by-wire flight control system that provides carefree handling.
The digital FBW system of the LCA is built around a quadruplex redundant architecture to give it a fail op-fail op-fail safe capability. It employs a powerful Digital Flight Control Computer (DFCC) comprising four computing channels, each powered by an independent power supply and all housed in a single line replaceable unit (LRU). The system is designed to meet a probability of loss of control of better than 1x10-7 per flight hour. The DFCC channels are built around 32-bit microprocessors and use a safe subset of Ada language for the implementation of software. The DFCC receives signals from quad rate, acceleration sensors, pilot control stick, rudder pedal, triplex air data system, dual air flow angle sensors, etc. The DFCC channels excite and control the elevon, rudder and leading edge slat hydraulic actuators. The computer interfaces with pilot display elements like multifunction displays through MIL-STD-1553B avionics bus and RS 422 serial link.
External Stores > Seven stations for a wide range of air-to-air missiles,anti-ship missiles, unguided rockets, conventional / retarded bombs. Provision for Drop tanks , Recce Pods, EW and other sensor pods.
Stealth Features > More than 90% of the LCA's wings and an even greater percent of its tailplane, etc is made of composites which are inherently stealthier than metal. Y-shaped air inlet ducts hide the engine blades. Its very small size and simple tail-less delta winged configuration ensure a very low RCS. Further Radar absorbent maiertials will be coated on the exterior. Infact the DRDO has publically stated that its RCS (when not treated with RAM) less than 1/3rd that of Mirage-2000's.
Unit Cost > 21 million $
Originally posted by Stealth Spy
The first production Tejas will rollout in June 2006...
Waynos - The IAF will start recieving the LCA's starting 2008.
However these will have the GE F-404 IN20 engines instead of the indigenous Kaveri engine. However the 'real Teajs' - i.e the one with the Kaveri engine will only come out beyond 2011 as stated. (the Kaveri is to make the Tejas supercruise as stated by the father of the LCA prgramme - Kota Hanumanthiah).
Also this news piece (dated Nov 26, 2005)seems to disagree with your press reports :
IAF to procure 126 LCAs by 2010
The Kaveri engine is presently in deep trouble. From what i gather at sepped in the excess of 1.4 Mach, there is some serious vibration.
The ADA has also announced its plans for the stealthy MCA, a development of the LCA and the Government has alredy made the initial funding for it.
The total requirement for the Tejas is 200+ as stated by the IAF air chief marshal and the officals at ADA and HAL.
The total money spent on the LCA programme till date is around 1.5 billion $.
This point is apparently lost to many(especially those in the Indian media) of those who criticise or even ridicule the LCA for being over 6 years behind schedule, and demand its cancellation at the hint of a delay!
From almost scratch, India has built up the necessary technical and industrial expertise to make and build a 4+ generation aircraft.
It is also noteworthy to add that the LCA's FCS systems are up to the standard of the Eurofighter, and is much more advanced than the Rafale, the Gripen the Mirage-2000-5 and the F-16 block 50.
The LCA and the Eurofighter have a fully digital quadruplex fly by wire systems that gives them care free handleing ... the Rafale, Gripen and the F-16 block 50 have 3 digital and 1 analog systems...while the Mirage 2000-5 has all its four FBW systems as analog.
Originally posted by Seekerof
But will not be introduced into the IAF till around 2009-2011.
Correct, based upon an average of all reliable sourcing on the LCA.
Also, the Kaveri engine is speculated to allow the LCA to supercruise, not that it has factly done so. It is mere educated speculation till proven otherwise.
you boast as fact that the Kaveri will allow the LCA to supercruise?
And again, according to an average of sources covering the MCA, IF everything goes according to the timely plan, the MCA will not be introduced into the IAF till 2012-2015.
Got a breakdown of this sourced? Are the numbers the R&D costs or design & testing costs or a combined total overall cost?
The most advanced 4th generation aircraft is the Gripen, followed by the F/A-18E/F Super Hornet and F-16C Block 70, among other mentions like the MiG-29/30, etc.
The LCA will not be competition for the likes of the EF-2000 and Rafale.
This does not imply that the LCA will be equal to the EF-2000. The LCA is and foremost a light-fighter, LCA=light combat aircraft, contrary to what the EF-2000 and Rafale are, among other aircraft you are comparing the LCA to.