Can a country skip decades of aerospace development and catch up with the world’s top players in unmanned, sixth generation air to air combat? The answer is a definitive yes, says Dr. Kota Harinarayana, the mastermind behind India’s Tejas fighter. “If the government decides to go for a full-scale, unmanned sixth-generation fighter jet, we are technologically ready,” he said, marking a watershed moment in defense innovation in India.
At the center of this epiphany lies India’s grasp of the flying wing a tail less, aerodynamically efficient airframe that has frustrated aerodynamicists for more than a century. In contrast to traditional aircraft, a flying wing does not have vertical or horizontal stabilizers, requiring flight control and stability to be fundamentally reexamined. Dr. Harinarayana underlined, “It’s not an easy thing you have to fly a wing without any vertical tail and horizontal tail and we have done it.” This feat, developed quietly under the Ghatak UCAV program, is more than a technical milestone; it is a starting leap toward real stealth and operational versatility.
The technological challenge is daunting. Tailless configurations have all of the stability and control tasks incorporated within the parent wing, using refined aerodynamic shaping, reflex airfoils, and swept planforms to achieve balance and controllability. As explained in recent studies, the center of gravity needs to be accurately located in relation to the aerodynamic center, with control being provided through advanced elevons and, occasionally, split drag rudders or differential spoilers. These characteristics, besides minimizing drag and radar cross section, also require high speed, real time flight control algorithms that can suppress built in instabilities and external disturbances.
Indian advancements are reflected in the successful flight tests of the Stealth Wing Flying Testbed (SWiFT), a scale model that proved the fundamental aerodynamic and control principles. These platforms are usually fitted with sophisticated onboard computers, stable inertial measurement units, and nested control loops much of the time utilizing adaptive or sliding mode control methods. Technical literature indicates that Fractional Order Sliding Mode Control (FOSMC) and Nonlinear Model Predictive Controllers (NMPC) are becoming popular choices in their ability to withstand nonlinearities, parameter uncertainties, and wind gusts, all of which are prevalent in flying wing UAVs.
Power for the Ghatak will be provided by a dry version of the indigenous Kaveri engine, throttled for subsonic operation. Although not an afterburner engine, it is designed to meet the special demands of unmanned systems thrust, fuel economy, and thermal handling to enable longer duration missions and low observability. Mating such a propulsion to a flying wing airframe is a serious engineering challenge, with tight control over inlet flows, thermal spectra, and acoustic radiation needed in order to maintain stealth.
But the journey toward a complete sixth generation UCAV goes so much more than airframe and propulsion. The world standard for sixth gen fighters, as espoused by present day aerospace programs, involves full spectrum stealth, persistent sensor fusion, and artificial intelligence well integrated into mission systems. These aircraft are being designed as nodes within a multidomain network, coordinating operations with manned and unmanned allies, and using AI to not only provide autonomy but also for real time tactical decision making. As one expert has described, “AI doesn’t just assist; it predicts, analyzes, and executes combat logic faster than any human could.”
India’s plan replicates these ambitions. The vision would incorporate AI-driven decision-making, loyal wingman drone teaming, and the integration of directed-energy weapons technologies that are currently being prototyped in leading Western and Asian programs. Directed energy weapons, in particular, offer a new frontier. As described in recent field tests, such systems provide “instantaneous engagement and unparalleled precision while requiring no consumables beyond electricity.” Miniaturizing power supplies, heat loads, and beam control systems into unmanned platforms’ volume and weight budgets is the challenge. India’s DRDO has made significant progress with laser dazzlers and is actively pursuing high power laser and microwave systems for counter drone and missile defense applications.
Flight control continues to be a prime engineering problem. In flying wing UAVs, the lack of traditional stabilizers results in stability being maintained by a combination of aerodynamic design and ongoing, high frequency, fine tuning by the flight control system. As shown in recent flight tests, incremental nonlinear dynamic inversion and differential flatness based controllers allow for aggressive trajectory tracking capability, even while performing aggressive maneuvers, and despite model uncertainties. These systems depend on accurate sensor feedback and fault tolerant algorithms to ensure control authority throughout the entire flight envelope.
Worldwide, India’s initiatives put it in an elite group of countries along with the United States, Europe, China, and Japan developing sixth generation air dominance. The tech race is as much about integration as invention: open architectures, modular architecture, and digital engineering are becoming the norm, allowing for quick upgrades and multinational interoperability. As the Advanced Medium Combat Aircraft (AMCA) project evolves, the foundation established by Ghatak and his successors may be able to advance India straight into the age of AI powered, stealthy, and networked unmanned fighter aircraft.
The choice now lies with policymakers. The technological bedrock is in place, the flight sciences are established, and the plan is evident. The world awaits to witness whether India will take advantage of this opportunity and shape the next chapter of unmanned aerial warfare.
