The Hindustan Aeronautics Limited Tejas is an Indian multi-role light fighter which has
been designed by the Aeronautical Development Agency in collaboration with Aircraft Research
and Design Centre of Hindustan Aeronautics Limited for the Indian Air Force and the Indian
Navy. The Harjet is a single-engine, tandem-seat trainer aircraft with advanced avionics and high-performance features that plays an important
role in current pilot training. A wide range of mission capabilities and a large payload
makes the combat variant a battlefield force multiplier, the aircraft is currently under
development. The Tejas has a night-vision goggles-compatible glass cockpit equipped with a domestically developed head-up display, three multi-function
displays, two smart standby displays by Central Scientific Instruments Organisation. The Tejas has hands-on throttle and stick arrangement to reduce the pilot's workload
The avionics of the Tejas Mark 1 is centred around Elta EL-M 2032 radar. Its digital flight
control computer and ADATA computer are developed by BEL. It has an electronic warfare suit
domestically developed by Defence Avionics Research Establishment which consists of a radar warning receiver, integrated self-protection jammer, chaff and flare dispenser system
On the other hand, talking about the Harjet, capabilities are planned to include air-to-air
refuelling, fly-by-wire with parameter limiting, built-in auxiliary power unit, night-vision goggles-compatible cockpit, head-up display and an integrated helmet display system
The company has developed simulator avionics, flight control systems, screen, cockpit and communication systems for the simulator
The Tejas weapon suit consists of one Derby ER and Astra Beyond Visual Range air-to-air missiles
and R-73, Python-5 and ASRAAM close combat missiles. The Tejas has an internal 23mm
GSH-23 twin-barrelled autocannon under the starboard side air intake. The BrahMos-NG supersonic cruise missile is being developed for the Tejas
The Harjet has a payload of around 3 tonnes which provides it to carry and launch
indigenous SOMJ air-to-surface missiles and guided munitions to neutralise adversary surface assets with limited air defence capability
It can also provide ISR assistance to the task group. The Tejas Mark 1 is currently powered by the F404 IN-20 engine. The Mark 1A variant
will be powered by the same powerplant while the heavier Tejas Mark 2
will be powered by a General Electric F414 IN-S6 engine. The Harjet model that underwent the initial wind tunnels test was configured in accordance
with GE's F404 GE-102 turbofan engine while currently the Harjet has two separate designs
in accordance with two different engine options. According to the sources, the Harjet will be powered by the F404 GE-102 engine from GE