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SOURCE: AFI

The latest iteration of the Hindustan Aeronautics Limited (HAL) CATS Warrior, showcased as a full-scale demonstrator, has introduced several significant modifications aimed at enhancing performance and stealth capabilities. These changes reflect HAL’s commitment to advancing India’s indigenous drone technology, particularly for the Indian Air Force’s (IAF) needs.

One of the most apparent alterations in the new CATS Warrior model is the redesign of the air intake. The earlier designs featured a more angular, stealth-focused intake, which has now been replaced with a smoother, curved design. This change appears to slightly compromise the stealth aspect, as the engine might be more visible than in previous models, potentially increasing radar cross-section. However, this redesign is not without its benefits.

The new intake geometry is specifically engineered to manage the boundary layer of air flowing close to the aircraft’s surface, which can reduce turbulence and improve the consistency of airflow into the engines. This adjustment could lead to better engine performance and efficiency, contributing to an overall slight improvement in stealth characteristics through the use of Radar Absorbent Material (RAM) coatings and other stealth technologies to compensate for any visibility increase.

he vertical stabilizers on the CATS Warrior have also seen a design overhaul. These modifications might be aimed at optimizing flight stability and control, especially under various combat scenarios, although specific details on the aerodynamic benefits are not explicitly outlined in public documents. The changes here could potentially contribute to better maneuverability and less drag, enhancing both speed and agility.

The demonstrator sports smaller landing gear doors, which are streamlined for better aerodynamics. This design choice reduces the drag when the gear is retracted, potentially allowing for higher speeds or better fuel efficiency during flight. The smaller doors also suggest an effort towards integrating the gear more seamlessly into the aircraft’s silhouette, which could help in maintaining a lower radar profile when not in use.

While the new air intake might seem less stealthy at first glance due to increased engine visibility, the overall design philosophy seems to balance stealth considerations with aerodynamic efficiency. The CATS Warrior aims to be not just stealthy but also effective in combat scenarios, where flying characteristics like speed, maneuverability, and fuel efficiency become critical. The slight trade-off in stealth could be seen as a strategic choice, banking on advanced materials and coatings to offset any radar signature increase while focusing on improving operational performance.

The redesign of the air intake is notably influenced by the need to manage the boundary layer. The layer of air close to the aircraft’s surface can cause drag if not handled properly. By refining the intake’s shape, HAL engineers seem to have addressed this issue, ensuring that the turbulent air close to the surface does not disrupt the engine’s intake flow, thus potentially enhancing the aircraft’s performance in various flight conditions