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Supersonic Tejas
Achieving speed of Mach 1.6, equivalent of 1,699 kilometers per hour, light combat aircraft (LCA) Tejas is Indias first indigenous supersonic, light weight fighter aircraft. There has been no looking back ever since the LCA took its maiden test flight on January 4, 2001.
By Vantika Dixit
Achieving speed of Mach 1.6, equivalent of 1,699 kilometers per hour, light combat aircraft (LCA) Tejas is Indias first indigenous supersonic, light weight fighter aircraft designed and developed by Aeronautical Development Agency (ADA) with Hindustan Aeronautics Limited (HAL) as its prime partner under the Ministry of Defence. The supersonic fighter is expected to get initial operational clearance by December 2010 and the final operational clearance by December 2012. There has been no looking back ever since the LCA took its maiden test flight on January 4, 2001.
Powered by gas turbine engine, the LCA Tejas is an advance technology, single seat, single engine, supersonic, light weight, all weather, multiple role air superior fighter aircraft. The LCA features tailless compound delta planform with relaxed static stability, fly-by-wire flight control system, advanced digital cockpit with elimination of all the mechanical gauges, multimode radar, and all digital avionics system. The aircraft can perform state-of-the-art electronic warfare (Ew) jobs which can identify the enemy radiations and jam them with strong burn-through capabilities. There are variants of LCA Tejas meant for different requirements. LCA Trainer is a two seater trainer used for training purposes. LCA Trainer PV5 is already fabricated and took its maiden flight on November 26, 2009.
Before ADA started developing the LCA, no indigenous alternative was available with India. The country felt the need for indigenous development of fighter aircraft mainly from the defence point of view and utilization of technological capability available in-house. As a result, in 1983, the government approved the initiation of the LCA program with a seed money of Rs 560 crore towards preparation of project proposal for full scale engineering development. The government split the complete development program into two phases: Technology demonstrator phase which was approved in April 1993, and the prototype development phase, which got approved in November 2001. Configuration of the aircraft was finalized in 2004, explains Program Director PS Subramanyam, who is also director of ADA.
LCA Tejas has been primarily built for the air defence role which is for area defence. It is also used for escort missions, in the air-to-ground roles and interdiction. The aircraft also can perform air-to-air and air-to-sea roles. LCA Tejas is modified to derive a Naval variant for Indian Navy. The Navy variant will be capable of operation from a carrier ship at sea. The trainer version of LCA navy, LCA NP1 is already under fabrication. The Naval version has to be designed to cater the stringent requirements of vision, approach angle, landing gear loads, ski jump take off, and landing at shorter length. The Naval version will have stronger landing gear, arrester hook system, and drooped nose section for better cockpit vision during deck landing. It will have fuel dump system and an advanced control feature of leading edge vortex control for better landing performance, says Subramanyam. The Naval version of LCA is expected to make its first flight in 2010.
The LCA Tejas is tested thoroughly in each stage. Test rigs/simulators are established and each system is tested individually and cohesively before it is integrated into the aircraft. The IAF has placed an order for 20 aircrafts with 16 fighters and four trainers. Further order has been initiated for 16 more fighters and four trainers. These series production aircrafts are planned to be delivered in the first quarter of 2011 for induction by the IAF. The first squadron is likely to be set up at Sulur, near Coimbatore. The present expenditure is more than Rs 5,000 crore with nearly 100 major work centers and 300 smaller work centers engaged in the development of LCA Tejas. Government has approved additional Rs 8, 000 crore for developing higher derivatives of the Tejas aircraft. The development cost of Tejas is now being shared by the IAF and Indian Navy also. Developing a technologically advanced fighter aircraft has led ADA to also take up the development of an autonomous unmanned research aircraft (AURA) and an advanced medium combat aircraft (AMCA) to add to Indias might, and pride.
Vantika Dixit is Senior Assistant Editor of Technology Review India edition.
Supersonic Tejas - Technology Review