Air Breathing Propulsion System

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About Air Breathing Propulsion System:

In this system the rocket will carry its fuel, but will not carry an on-board oxidiser.
Instead, this system will utilise atmospheric oxygen as an oxidiser to burn the fuel. This makes rockets significantly lighter and more efficient.
However, such air-breathing technologies can be used only within the denser layers of the Earth’s atmosphere, where there is an adequate supply of oxygen.
Such technologies might be feasible in the denser layers of Earth’s atmosphere (up to 70kilometres altitude), and thereafter the rocket must switch to another stage that has both fuel and an on-board oxidizer.
Types of air-breathing propulsion
- Ramjet: It is an air breathing propulsion engine operating on the principle of supersonic combustion. It has the absence of any rotator and relies solely on the forward motion of the engine to compress incoming air.
- Scramjet: It is an upgraded version of the Ramjet and generates thrust through supersonic air flow and combustion. It moves at hypersonic speed and performs best at high speeds, greater than Mach 5.
- In 2023, India became the fourth country to successfully demonstrate the flight testing of a Scramjet Engine.
- Dual-Mode Ramjet (DMRJ): It is a jet engine where a ramjet transforms into a scramjet over Mach 4-8 range and it can efficiently operate both in subsonic and supersonic combustor modes.

Q1: What is ISRO?

Indian Space Research Organisation (ISRO) is the space agency of India, responsible for the planning and execution of space-related activities in the country. ISRO is one of the most prominent and successful space agencies in the world, known for its cost-effective and efficient space missions. The primary goal is the development and application of space technology for various national needs.

Source: ISRO conducts experimental flight of Air Breathing Propulsion System