SOURCE: AFI
The Defence Research and Development Organisation (DRDO) has proudly announced that India’s indigenous Light Combat Aircraft (LCA) Tejas showcases one of the lowest Radar Cross-Sections (RCS) in its segment, attributing this achievement to the extensive use of composite materials in its construction. This revelation underscores India’s pioneering role in leveraging composite technology for defence applications, significantly enhancing the stealth capabilities of the Tejas, albeit not originally designed as a stealth fighter.
According to DRDO, the LCA-Tejas incorporates 45% composites by weight in its airframe. This is a notable proportion, especially when compared to other contemporary fighters which often use less composite material in their construction.
An impressive 90% of the aircraft’s visible surface area is made up of composite materials. This extensive use is not just for structural benefits but significantly aids in reducing the aircraft’s radar visibility.
While contemporary fighters in the same category largely rely on metallic structures, Tejas’ composite airframe offers superior performance in terms of reduced electromagnetic reflection, which is a critical factor in modern air combat scenarios. This enables the aircraft to have better survivability in high-threat environments where radar detection plays a crucial role.
Composites inherently have lower radar reflectivity compared to metals. The high percentage of composites in the Tejas means that it naturally has a lower RCS, making it less detectable by enemy radar systems. This is particularly beneficial in modern aerial warfare where stealth can provide a critical advantage.
Although the Tejas was not initially designed with stealth as a primary attribute, the composite structure inadvertently contributes to stealth characteristics. This has made the aircraft somewhat stealthier than its contemporaries in the same class, offering a tactical edge in operational scenarios.
Beyond stealth, composites contribute to the aircraft’s lightweight design, improving fuel efficiency, range, and maneuverability. They also offer resistance to corrosion, reducing maintenance requirements over the aircraft’s lifespan.
RDO has been at the forefront of adopting and developing composite technology in India. The organization’s focus on composites for defense applications has not only benefitted the Tejas but has also set a precedent for future projects.
Through extensive R&D, DRDO has mastered the art of composite manufacturing, ensuring that these materials meet the stringent demands of military aviation in terms of strength, durability, and stealth.
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