The Defence Bio-Engineering & Electro Medical Laboratory (DEBEL), a Bengaluru-based unit under the Defence Research and Development Organisation (DRDO), has completed high-altitude trials of the On-Board Oxygen Generating System (OBOGS)-based Integrated Life Support System (ILSS) for the LCA Tejas aircraft. The trials were conducted on March 4, 2025, using the LCA-Prototype Vehicle-3 aircraft developed by Hindustan Aeronautics Limited (HAL) and the Aeronautical Development Agency (ADA).
The ILSS is designed to generate and regulate breathable oxygen for pilots during flight, eliminating the need for traditional liquid oxygen cylinders. Testing included flight conditions at altitudes up to 50,000 feet Above Mean Sea Level and high-G maneuvers. Performance evaluations covered oxygen concentration, demand breathing, emergency oxygen availability, and operation of the Anti-G Valve and Breathing Oxygen System during various flight phases. The system met all specified parameters following flight clearance from the Centre for Military Airworthiness & Certification (CEMILAC).
The ILSS integrates ten Line Replaceable Units, including a Low-Pressure Breathing Regulator, Emergency Oxygen System, Oxygen Sensor, and Anti-G Valve. The system, developed with L&T as a Development cum Production Partner, has an indigenous content of 90%. It is designed for potential adaptation to aircraft such as the MiG-29K.
The development involved collaboration among DEBEL, ADA, HAL, CEMILAC, the National Flight Test Center, the Directorate General of Aeronautical Quality Assurance, and the Indian Air Force. A press release from DRDO noted that the successful trials mark a step in enhancing aerospace technology within India's defence sector.
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