The Defence Bio-Engineering & Electro Medical Laboratory (DEBEL), a premier facility under the Defence Research and Development Organisation (DRDO), has successfully completed high-altitude trials of the Indigenous On-Board Oxygen Generating System (OBOGS)-based Integrated Life Support System (ILSS) for the Light Combat Aircraft (LCA) Tejas.
The ILSS, designed to generate oxygen for pilots in real time, eliminates the reliance on conventional liquid oxygen cylinders. The system underwent extensive testing on the LCA-Prototype Vehicle-3, developed by Hindustan Aeronautics Limited (HAL) and the Aeronautical Development Agency (ADA). It demonstrated its efficiency in various aeromedical conditions, including altitudes reaching 50,000 feet above mean sea level and high-G maneuvers.
During evaluations, the system’s performance was assessed for key parameters such as oxygen concentration, demand breathing, and emergency oxygen availability. Its functionality was tested across different phases of flight, including taxiing, takeoff, cruising, G-turns, and landing. With flight clearance from the Centre for Military Airworthiness & Certification (CEMILAC), the ILSS successfully met all required operational standards.
The system integrates 10 Line Replaceable Units (LRUs), including the Low-Pressure Breathing Regulator, Breathing Oxygen System (BOS), Emergency Oxygen System, Oxygen Sensor, and Anti-G valve. These components ensure a continuous oxygen supply, enhancing pilot endurance and mission effectiveness.
Developed with 90% indigenous content, the ILSS marks a significant step toward India’s self-reliance in aerospace technology. Larsen & Toubro (L&T) played a key role as the Development cum Production Partner, strengthening collaboration between DRDO and the Indian defence industry. The system’s design allows potential adaptation for other fighter aircraft, including the MiG-29K.
This achievement was made possible through the joint efforts of DEBEL, ADA, HAL, CEMILAC, the National Flight Test Centre, the Directorate General of Aeronautical Quality Assurance, and the Indian Air Force (IAF).
Defence Minister Rajnath Singh commended DRDO, IAF, public sector enterprises, and industry partners, highlighting that this breakthrough aligns with India’s vision for technological advancement under ‘Viksit Bharat 2047.’
Dr. Samir V Kamat, Secretary of Defence R&D and Chairman of DRDO, also praised the collaborative efforts of the DRDO team, IAF, and industry partners in successfully completing the high-altitude trials of the indigenous ILSS for LCA Tejas.