Replacing the Tejas Mk1A’s existing F404-IN20 engine would involve far more than a straightforward engine swap, according to aerospace specialists. The fighter’s structure, aerodynamics, flight-control systems, and mission software have all been designed around the characteristics of the current powerplant. Introducing a different engine would require significant redesign efforts, including modifications to intake ducts, structural supports, fuel systems, cooling arrangements, and digital engine management software. In addition, weapon integration and flight envelopes would need to be revalidated through extensive testing. Experts estimate that a re-engined Tejas could require several years of development and certification before entering service. While options such as the Safran M88 and indigenous Kaveri engine remain strategically important, integrating them would represent a major engineering program rather than a simple upgrade.
