The programme was officially announced in 2020, in response to the Indian Navy's dissatisfaction in operating a single-engine carrier-based fighter based on the HAL Tejas, and its eventual withdrawal from the naval LCA programme in 2016. A model of the aircraft was displayed at Aero India 2021.[3] The first flight is expected to be in 2026,[4][5][6] with production planned for 2031.[7]
The design's twin engines are expected to allow shorter take-offs from the Indian Navy’s Short Take-Off Barrier Arrested Recovery (STOBAR) aircraft carriers.[2] As a dedicated deck-based fighter, it will feature foldable wings for more compact storage. The TEDBF will predominantly be equipped with indigenous weapons systems.[3][8][9]
The naval LCA programme to develop a carrier-based fighter for the Indian Navy was launched in 2003.[10] The ADA was entrusted with the task of designing and developing a new naval fighter based on the existing Tejas template. The programme was envisaged to be completed in two phases - in the first phase, two prototypes were to be built, based on the Tejas Mk. 1 design. In the second phase, two more prototypes were to be built based on the Tejas Mk. 2 design.[10] The programme was jointly funded by the Defence Research and Development Organisation (DRDO) and the Indian Navy, with the latter funding 40% and 60% of the developmental cost of naval LCA Mk. 1 and Mk. 2, respectively.[11] In 2009, the Cabinet Committee on Security approved the development of Mk. 2 variant of the naval LCA.[12] The first naval prototype, a two-seater NP-1, was rolled out in 2010, and first flew on 27 April 2012.[13] By 2015, another naval LCA prototype, a single seater NP-2, had joined the programme, and carried out first ski jump assisted take off from a shore-based test facility (SBTF) in Goa.[14][15] In December 2016, the Indian Navy opted out of the programme completely, with the cited reason being that the nav variant was 'overweight', and issued a fresh RFI for the immediate procurement of 57 Multi-Role Carrier Borne Fighters (MRCBF).[16][17][18] The stalled programme was revived once again in 2018, under the oversight of the then Minister of Defence, Nirmala Sitharaman.[19] The flight tests were resumed with NP-1 and NP-2 for attaining technological maturity of the carrier based fighter.[20] By early 2020, the naval LCA had successfully carried out night-time arrested landing at the Goa SBTF, and carrier landing and take off on the aircraft carrier INS Vikramaditya.[21][22][23]
In April 2020, the ADA announced work on a new naval fighter based on the Indian Navy's MRCBF 2016 requirement to replace the existing fleet of Mikoyan MiG-29K carrier-based fighters.[3][24] The new naval fighter unveiled at the Aero India airshow 2021 turned out to be of a twin engine, medium weight class fighter, now called Twin Engine Deck Based Fighter (TEDBF).[25] The experience gained in the Naval LCA (N-LCA) programme is expected to help in the development of the TEDBF.[26]
The Government of India approved the TEDBF project in mid-2020. The aircraft will have canards to increase the lifting surface area, and will employ two General Electric F414 engines. The first flight is expected in 2026.[27] According to Project Director TV Vinod Kumar, the estimated cost of four prototypes will be ₹14,000 crore. ADA is looking for joint development with Indian private sector. Indian Navy is planning the induction from 2032 when Mikoyan MiG-29K will start retiring. Upon the entry into service of the proposed INS Vishal, TEDBF will be modified for Catapult Assisted Take-Off Barrier Arrested Recovery (CATOBAR) operations.[28] As an interim measure, Navy will procure Rafale M or BoeingF/A-18E/F Super Hornet until TEDBF is ready.[29] Due to the TEDBF project, the Indian Navy reduced their orders for foreign fighters from 57 aircraft to 26, including trainer variants.[30]
A proposed air force variant of the TEDBF design, called the Omni-Role Combat Aircraft (ORCA) weighing around 23 tonnes is also under study.[31] The Indian Air Force is expected to need more than 750 aircraft between 2030 and 2050. ORCA, if funded, would be developed in parallel to the HAL AMCA.[32] ADA will submit Preliminary Design Review on Q2 2023. The prototype will take 1,000 flights during test phase.[33] TEDBF is undergoing wind-tunnel testing. DRDO is conducting high speed modelling to test the supersonic characteristics using internal funds.[30]