India Advances Aviation Safety with New Oxygen System
The Defence Bio-Engineering & Electro Medical Laboratory (DEBEL) in Bengaluru has successfully completed high-altitude trials of the Indigenous On-Board Oxygen Generating System (OBOGS)-based Integrated Life Support System (ILSS) for the LCA Tejas aircraft. Conducted on March 4, 2025, these trials mark a significant step in enhancing pilot safety and operational efficiency in Indian military aviation.
Innovative Oxygen Generation Technology
The OBOGS-based ILSS is a state-of-the-art system designed to produce and manage breathable oxygen for pilots during flight. This innovation eliminates the need for traditional liquid oxygen cylinder systems, which can be cumbersome and less efficient. The ILSS was rigorously tested on the LCA-Prototype Vehicle-3, developed by Hindustan Aeronautics Limited (HAL) and the Aeronautical Development Agency (ADA). The system successfully met stringent aeromedical standards across various flight conditions, including altitudes reaching up to 50,000 feet and during high-G maneuvers.
Performance evaluations focused on critical factors such as oxygen concentration and demand breathing capabilities. The system ensured the availability of 100% oxygen during aerobatic maneuvers, takeoff, cruising, and landing. Following clearance from the Centre for Military Airworthiness & Certification (CEMILAC), the ILSS demonstrated compliance with all specified parameters, showcasing its reliability and effectiveness in real-world scenarios.
Comprehensive System Features
The ILSS is equipped with ten Line Replaceable Units, which include essential components such as the Low-Pressure Breathing Regulator, Breathing Oxygen System (BOS), Emergency Oxygen System, and Anti-G valve. This advanced configuration allows for real-time oxygen generation, significantly enhancing pilot endurance and operational effectiveness during missions. The system’s design also allows for modifications, making it adaptable for use in other aircraft, including the MiG-29K.
Manufactured by L&T as a Development cum Production Partner, the ILSS reflects a robust collaboration between the Defence Research and Development Organisation (DRDO) and Indian defense industries. With 90% indigenous content, this development underscores India’s commitment to self-reliance in aerospace technology, aligning with the broader vision of ‘Viksit Bharat 2047’.
Recognition and Future Implications
Following the successful trials, Raksha Mantri Shri Rajnath Singh extended his congratulations to the DRDO, Indian Air Force (IAF), public sector undertakings, and industry partners for this remarkable achievement. He emphasized that this advancement reinforces India’s dedication to cutting-edge defense technologies.
Dr. Samir V Kamat, Secretary of the Department of Defence R&D and Chairman of DRDO, also praised the collaborative efforts of the DRDO team, IAF, and industry partners in achieving this milestone. The successful high-altitude trial of the Indigenous ILSS for the LCA Tejas not only enhances pilot safety but also positions India as a leader in innovative defense solutions.
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