In 2019, Hindustan Aeronautics Limited (HAL) proposed a twin-engine fighter jet design based on the LCA-Tejas platform, aiming to fulfill the Indian Navy's specific requirements. This proposal emerged amidst ongoing discussions regarding the Twin Engine Deck Based Fighter (TEDBF) program led by the Aeronautical Development Agency (ADA).
Sources indicate that HAL's proposal aimed to pre-empt the TEDBF program, leveraging their experience with the single-engine Naval LCA technology demonstrator. Initially, the ADA proposed a 16.5-ton single-engine Naval LCA Mk2 with upgraded F-414 engines. However, safety concerns associated with single-engine operations on aircraft carriers led to its rejection.
HAL addressed these concerns by incorporating twin engines into their design, utilizing the existing LCA platform to expedite development. While specifics remain undisclosed, the proposed fighter was estimated to be heavier than the rejected Naval LCA Mk2, potentially reaching 25 tons.
The initial variant was likely to be powered by F-414 engines, currently used in the Tejas MkII, with a long-term goal of utilizing indigenously developed engines derived from technology for the AMCA MkII, India's next-generation 5th generation fighter jet. This approach sought to combine foreign expertise with domestic engine development capabilities.
In contrast, the ADA's TEDBF program proposed a completely new twin-engine design, envisioned as a heavier 26-ton platform with a potentially longer development timeline due to its fresh design approach.
Ultimately, the Indian Navy determined that the TEDBF program better aligned with its requirements. While HAL's proposal offered a potentially faster development cycle based on existing experience, the ADA's TEDBF program promised a more advanced, purpose-built design.