An official from the Indian Space Research Organisation (Isro) said two scramjet engines were tested during the flight.
He said the two air breathing engines were hugging the rocket on its sides and when the rocket reaches a height of 11 km, the scramjet will start breathing air.
The scramjet engine, used only during the atmospheric phase of the rocket’s flight, will help bring down the launch cost by reducing the amount of oxidizer to be carried with the fuel.
The test flight was the maiden short duration experimental test of Isro’s scramjet engine with a hypersonic flight in Mach-6.
Isro said some of the tech challenges handled during the development of the scramjet engine include design and development of hypersonic engine air intake, development of materials withstanding very high temperatures, proper thermal management and ground testing.
India is the fourth country to demonstrate the flight testing of the Scramjet engine.