Recent satellite images have identified the full-scale engineering model of India’s Advanced Medium Combat Aircraft (AMCA) at a Radar Cross Section (RCS) testing site in Dundigal, Hyderabad.
Originally revealed to the public during the Aero India 2025 exhibition, this model is currently situated at the Defence Research and Development Organisation's (DRDO) ORANGE (Open Range) facility, where it is undergoing critical ground assessments to verify the stealth capabilities of the aircraft.
A Crucial Step Before First Flight
Hyderabad-based VEM Technologies manufactured this 1:1 scale engineering airframe, which served as a major highlight at Aero India 2025 to showcase the country's upcoming indigenous fifth-generation fighter.In aerospace development, these life-sized models serve as vital tools for ground-level tasks.
Engineers use them to check how systems fit together, study maintenance procedures, evaluate ergonomics, and conduct various pre-flight checks well before actual flying prototypes are manufactured.
Current program timelines project the first flying prototypes to roll out between late 2026 and 2027, aiming for a maiden flight by 2028.
Placing this airframe at a dedicated RCS facility marks a major milestone, as stealth validation is a mandatory phase for any fifth-generation combat jet.
Sites like the ORANGE range are specially equipped to test how an aircraft's shape and radar-absorbent materials reflect electromagnetic waves from multiple angles.
By mapping these reflections, scientists can pinpoint specific zones on the jet that cause unwanted radar visibility and make necessary adjustments to ensure the final product can successfully evade enemy detection.
Testing an Evolving Design
It is important to note that the model seen in Dundigal reflects an older iteration of the AMCA's design.The airframe built for Aero India 2025 does not feature Diverterless Supersonic Inlets (DSI), a major aerodynamic enhancement that the Aeronautical Development Agency (ADA) has since adopted for the current baseline design.
Incorporating DSI, alongside serpentine air ducts that conceal the engine fan blades, removes traditional boundary-layer diverter structures.
This update ultimately simplifies the aircraft's physical framework, cuts down on maintenance needs, and significantly boosts its stealth profile.
Conducting ground tests on a previous design version is standard practice in complex military aviation projects.
Test articles and engineering mock-ups are frequently constructed prior to finalizing the ultimate blueprint.
This approach allows engineers to test and validate multiple physical and internal aspects of the jet simultaneously, while aerodynamic and radar-evasion improvements are still being refined digitally.
The insights gained from the current RCS evaluations in Hyderabad will be directly fed into the finalized stealth shaping.
The Road Ahead for AMCA
Consequently, the airframe captured in the latest satellite photos does not represent the exact shape of the jets that will eventually enter mass production.Rather, it highlights the ongoing usefulness of this physical model for continuous testing as the AMCA program moves forward.
The production roadmap currently includes two phases: the Mark 1 variant, powered by American GE-F414 engines, and a future Mark 2 variant that is planned to integrate a more powerful, domestically developed 110kN engine.
Ultimately, ground-testing airframes are indispensable to modern fighter jet programs.
They provide a hands-on platform to finalize where internal components go, ensure mechanics can easily reach parts for repairs, test the physical integration of advanced avionics, and perform a wide array of static evaluations.
Completing these steps on the ground significantly lowers the technical risks and challenges before the actual AMCA prototypes begin their flight test campaign.
