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P.S. SUBRAMANYAM, Director, Aeronautical Development Agency (ADA), Bangalore, stands next to a big model of India's own Light Combat Aircraft (LCA) Tejas, fondly runs his fingers over the edges of its wide wings, and says with a glimmer in his eyes: This is the lightest combat aircraft in the world. Its pilots have told me that when they land, it is like landing on butter! The landing is so smooth. It is because the wings occupy the largest area of the aircraft's surface area. It has no tail! This is something special about this aircraft.
... The Initial Operations Clearance (IOC) it received on January 10 meant that its production could begin at Hindustan Aeronautics Limited (HAL), Bangalore. So far we have spent Rs.6,000 crore on the project, which has resulted in 14 aircraft, out of which 11 are flying. The rest are ready to fly, said Subramanyam, who is also Programme Director (Combat Aircraft).
...The single-engine, single-seater, fourth generation aircraft is the smallest and lightest multi-role supersonic fighter in its class. The Delta wing aircraft (wingspan 8.2 metres, length 13.2 m, and height 4.4 m) will carry a variety of missiles and laser-guided bombs. Tejas is already integrated with the R-73 missile and is soon to be integrated with two Israeli missiles, Python-5, a close combat missile, and Derby, which can home in on targets more than 50 km away. The indigenous content of Tejas, which stands at 60 per cent now, will reach 70 per cent in its Mark II variant.
In the face of technology denial regimes and embargoes, the development of the aircraft epitomises the collaborative efforts of several institutions, among them the ADA, its principal partner HAL, and the Aeronautical Development Establishment (ADE).
P.S. Krishnan, Director, ADE, said, We have developed the most crucial technologies for Tejas. We have built a simulator for it, which is a world-class facility. We built the simulator for Arjun, the main battle tank. Simulators are a big area for us. We developed the digital fly-by-wire flight control systems for the LCA, which is a crucial technology.
It is a state-of-the-art simulator. It can help the pilot fly his aircraft in any mode he wants, explained V.S. Chandra Shekar, Group Director, ADE. B.P. Sashidhara, Scientist, Flight Simulation Division, added, Whatever manoeuvres we can do in real aircraft, we can do in the simulator. We can pitch, roll and yaw. V. Kala, Project Director for Tejas' flight control systems (FCS), S. Gurudev, Group Director, and Krishnan, who worked jointly on the FCS, were proud that the ADE was chosen to make it.
The fighter aircraft's performance has been flawless in more than 1,550 flights, as on February 17, there have been no incidents at all, not to talk of accidents. Tejas has been flown successfully in extreme conditions in Nagpur during peak summer at a searing 48° Celsius and in the rarefied heights of Leh at −28° C. The LCA is marching towards Final Operations Clearance in 2012.
Air Commodore Rohit Verma, Project Director, National Flight Test Centre, Bangalore, who has flown Tejas 55 times, said, The aircraft handles very well. Young pilots have flown it. They find it safe. It has good sensors, radars, a helmet-mounted sight and an inertial navigation unit.
On the basis of a project definition document that was formulated in 1990, the ADA, in a report to the Ministry of Defence, said it would take seven years and Rs.4,000 crore to develop the LCA. It was conceived as an ambitious attempt to bridge huge technological gaps in multiple disciplines, including fighter aircraft design. The programme began in 1993 when the Government of India decided to support the technology development for the aircraft, which was completed in March 2004. The first Technology Demonstrator for flight took place earlier, in January 2001.
The biggest challenge when we took up the programme in 1993 was to catch up with the rest of the world in fourth generation fighter aircraft technologies. The greatest achievement of this phase is that India mastered them, said Subramanyam. The fourth generation technologies are fly-by-wire flight control systems; unstable aerodynamics; glass cockpit incorporating the latest all-digital avionics systems; advanced composite materials for the airframe; and computer-based control of all electromechanical systems.
When India began the Tejas programme, the rest of the world argued that India would not be able to do it because it faced a gap of 30 years in developing these fourth generation technologies.
Subramanyam said, I should put on record here that it was the decision of persons such as [former President] A.P.J. Abdul Kalam and Kota Harinarayana that we should attempt these technologies. They said we should be confident that our youngsters would be able to achieve these technologies.
Kota Harinarayana, former ADA Director, is the chief architect of the Tejas project. In honour of his contribution to the project, the letters KH were inscribed on the aircraft that made the first flight in January 2001.
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A team of test pilots from the IAF and the Navy gave suggestions on how to improve the aircraft's flying qualities. The pilots were able to tell the designers how the aircraft should behave. So whatever deficiencies they had seen in other aircraft, we were able to overcome in Tejas, said Subramanyam.
When the naval prototype completes its [aircraft] carrier compatibility trails by 2014, it will be a great achievement, he said. For India will be only the second country, after Russia, to have a fighter aircraft that can ski-jump from an aircraft carrier and land on the carrier. The ski jump involves a short runway on the aircraft carrier for take-off and landing with the help of an arrester. The U.S.' fighter aircraft use the catapult method to take off and land on carriers.
A spin-off from the programme is that it has nurtured many private industries to take the various fourth generation fighter aircraft technologies to new levels of design, development, testing and fabrication.
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Meanwhile, the Kaveri engine for fighter aircraft being developed by the Gas Turbine Research Establishment (GTRE), a DRDO laboratory in Bangalore, crossed a milestone on November 3, 2010, when an IL-76 aircraft flew with it for an hour at an altitude of 6,000 m at a speed of 0.6 Mach (0.6 times the speed of sound). This trial took place at the Gromov Flight Research Institute (GFRI), Moscow, Russia. DRDO officials said the engine control, performance and health were excellent during the flight.
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