With development of Tejas,India is now in the league of five countries to have developed an Indigenous Integrated Life Support System- On-Board Oxygen Generating system,which was developed for LCA-Tejas. The system is helpful in long endurance flights.
This was developed by Debel, a DRDO laboratory researching in the field of development of bio‐medical and electro‐medical soldier support systems.
ILSS‐OBOGS is a fundamental accessory in Tejas to prevent in‐flight hypoxia,which is caused by deficiency in the amount of oxygen reaching the tissues,a problem during high-altitude flying and emergency escape and gravity-induced loss of consciousness during high G-maneuvers,due to which pilots pass out during intense dogfights.
ILSS-OBOGS uses the bleed air from the aircraft’s engine to produce oxygen,which is different from the liquid oxygen based system,employed on other contemporary aircrafts. The OBOGS provides oxygen for breathing purposes, a breathing regulator that supplies the breathing gas to the pilot at a desired flow and pressure, an Anti-G-Valve (AGV) that inflates the anti-gravity suit to apply desired counter pressure and an Electronic Controller Unit (ECU) to coordinate control functions.
Bleed air from the aircraft engine is utilized by separating oxygen from other components by a process based on Pressure Swing Adsorption (PSA) technology thus replacing the Liquid Oxygen based system (LOX) . LCA has lesser space to store the liquid oxygen,so it is beneficial for LCA as it also provides better safety,low operational costs,and lesser complex logistics.
The ILSS-OBOGS can also be customized to the needs of other fighter aircraft like MIG-29, Sukhoi Su-30 MKI and Mirage-2000,in IAF Service.
A solid-state oxygen sensor is also there to sense oxygen concentration in the breathing gas. ILSS‐OBOGS,also provides impart life support during emergency escape.