India’s DRDO Tests Indigenous Oxygen System for LCA Tejas at 50,000 Feet

The Defence Bio-Engineering & Electro Medical Laboratory (DEBEL), under the Defence Research and Development Organisation (DRDO), conducted high-altitude trials of the Indigenous On-Board Oxygen Generating System (OBOGS)-based Integrated Life Support System (ILSS) for the LCA Tejas aircraft on March 4.

The OBOGS-based ILSS generates breathable oxygen for pilots in real time, removing the need for traditional liquid oxygen cylinders. The system was tested on the LCA-Prototype Vehicle-3 aircraft of Hindustan Aeronautics Limited (HAL) and the Aeronautical Development Agency (ADA), meeting aeromedical standards during various flight conditions, including altitudes up to 50,000 feet Above Mean Sea Level and high-G maneuvers.

The trials evaluated oxygen concentration, demand breathing, and the availability of 100% oxygen across different phases such as take-off, cruise, G-turns, and landing. The system also underwent full functional testing of the Anti-G valve and Breathing Oxygen System (BOS). After receiving flight clearance from the Centre for Military Airworthiness & Certification (CEMILAC), the ILSS met all performance criteria.

The system integrates 10 Line Replaceable Units, including the Low-Pressure Breathing Regulator, BOS, Emergency Oxygen System, and Anti-G valve. It is designed to improve pilot endurance and operational effectiveness by providing continuous oxygen generation.

Manufactured by L&T as a Development cum Production Partner, the ILSS contains 90% indigenous components. The system can also be adapted for aircraft like the MiG-29K with suitable modifications.

The trials involved collaboration between DEBEL, ADA, HAL, CEMILAC, the National Flight Test Center, the Directorate General of Aeronautical Quality Assurance, and the Indian Air Force (IAF).