What is the HAL Tejas Mk 1A? India’s Indigenous Light Combat Aircraft, Explained
The HAL Tejas Mk 1A is India’s indigenous single-engine, single-seat, delta-wing light combat aircraft (LCA) developed by the Aeronautical Development Agency (ADA) and manufactured by Hindustan Aeronautics Limited (HAL). Conceived in the 1980s under the Light Combat Aircraft program to replace the Indian Air Force’s aging MiG-21 fleet, the Tejas had a notoriously long development timeline – first flight in 2001, initial operational capability in 2013, and the upgraded Mk 1A entering production in 2024. With 83 Mk 1A airframes on contract for the IAF and the more capable Tejas Mk 2 in development, the Tejas family represents the centerpiece of India’s effort to substitute imported fighters with domestic production.
Key facts at a glance
| Attribute | Value |
|---|---|
| Type | Single-engine multi-role light combat aircraft |
| Manufacturer | Hindustan Aeronautics Limited (HAL) |
| First flight | 4 January 2001 |
| Service entry | 2016 (IAF FOC); 2024 (Mk 1A production) |
| Crew | 1 |
| Engine | 1x GE F404-GE-IN20 turbofan, 19,000 lbf with afterburner |
| Length | 13.2 m |
| Wingspan | 8.2 m (delta wing) |
| Empty weight | 6,500 kg |
| MTOW | 13,500 kg |
| Max speed | Mach 1.6 |
| Combat radius | 500 km (hi-lo-hi); 850 km (with drop tanks) |
| Hardpoints | 8 |
| Internal cannon | 1x 23 mm GSh-23 twin-barrel |
| Operators | Indian Air Force (current); Indian Navy (LCA Navy MK 2 planned) |
| Pending | Argentina (negotiation), Egypt (evaluation), Nigeria (initial interest) |
| Unit cost | ~ USD 43 million (Mk 1A) |
Variants and development
| Variant | Year | Key feature |
|---|---|---|
| Tejas Mk 1 (IOC) | 2013 | Initial Operational Clearance; mechanical scan radar |
| Tejas Mk 1 (FOC) | 2019 | Full Operational Clearance; air-to-air refueling; BVR missile |
| Tejas Mk 1A | 2024 | Uttam AESA radar; SDR/comms upgrade; improved EW; mid-air refueling probe |
| Tejas Mk 2 (MWF) | 2028+ | Medium Weight Fighter; F414 engine; canard delta; +20 percent payload |
| Tejas Navy Mk 2 | 2030+ | Carrier-capable variant for Indian Navy INS Vikrant operations |
The Uttam AESA radar
The Tejas Mk 1A’s most significant upgrade over the Mk 1 is the integration of the Uttam AESA radar developed by India’s Defence Research and Development Organisation (DRDO). The Uttam is an X-band gallium-arsenide phased-array with approximately 768 transmit-receive modules. Maximum detection range against a fighter-sized target is estimated at 150 km. The radar gives Tejas Mk 1A genuine 4.5-generation air-to-air capability, supporting the Astra Mk 1 BVR missile and (in future) the Astra Mk 2.
Weapons
| Role | Weapons |
|---|---|
| BVR air-to-air | Astra Mk 1 (Indian-built; 110 km range); MBDA Meteor (Mk 2 planned) |
| WVR air-to-air | R-73, ASRAAM, Python-5 |
| Air-to-surface | SAAW (Smart Anti-Airfield Weapon), KAB-1500L, GBU-12 Paveway II |
| Anti-ship | BrahMos-NG (planned for Mk 2) |
Combat record
The Tejas has not been used in combat as of late 2025. The platform’s first operational squadron – No. 45 Squadron “Flying Daggers” – has been on quick-reaction alert at Sulur AFS since 2018. Tejas demonstrators have participated in international exercises including Garuda VII (UAE 2024) and a Royal Malaysian Air Force evaluation.
Tejas vs. its peers
| Tejas Mk 1A | JF-17 Block III | Saab Gripen E | F-16C Block 70 | |
|---|---|---|---|---|
| Engine | 1x F404 (19,000 lbf) | 1x RD-93MA (19,000 lbf) | 1x F414G (22,000 lbf) | 1x F110-GE-129 (29,000 lbf) |
| Max speed | Mach 1.6 | Mach 1.6 | Mach 2.0 | Mach 2.05 |
| Radar | Uttam AESA | KLJ-7A AESA | Raven ES-05 AESA | AN/APG-83 AESA |
| Combat radius | 500 km | 900 km | 1,500 km | 1,360 km |
| Hardpoints | 8 | 7 | 10 | 9 |
| Unit cost | ~ USD 43M | ~ USD 25M | ~ USD 85M | ~ USD 64M |
The Argentine deal
The most-watched potential Tejas export is to Argentina, which has been evaluating the Tejas Mk 1A as a replacement for its Mirage 2000 and A-4AR fleets. The Tejas competes against the Chinese JF-17 and the Danish F-16AM/BM in Argentine negotiations. As of mid-2025, talks remain open; a 12-aircraft contract worth approximately USD 600 million would be the first Tejas export sale and the largest single Indian fighter export in HAL’s history.
Mk 2 and the LCA Navy
The Tejas Mk 2 – now formally redesignated the Medium Weight Fighter (MWF) – is essentially a different aircraft sharing the Tejas name. A more powerful F414 engine, canard-delta planform, larger fuselage and 6,500 kg internal fuel give the Mk 2 a combat radius of approximately 1,500 km. First flight is targeted for 2027 with operational service from 2029. The Indian Navy’s LCA Navy MK 2 carrier variant is planned for service from 2031.
Why the Tejas matters
The Tejas program defined four decades of Indian defense-industrial development. Despite the program’s notoriously long timeline, the Mk 1A’s operational entry has validated India’s ability to design, build and operate a domestic 4.5-generation fighter. The Mk 2 / MWF will bring genuine medium-weight multi-role capability, and the Argentine negotiations could open the platform’s first international market. As India’s air force seeks to maintain 42 squadrons against rising Chinese and Pakistani capabilities, the Tejas family will be the principal platform of indigenization through the 2030s.
