ISRO has achieved yet another milestone in the development of cryogenic rocket engines by successfully ground testing one for a duration of 800 seconds.
The engine is India’s first indigenously designed and developed high-thrust cryogenic rocket engine, generating a thrust of 19 tonnes.
The endurance hot test of 800 seconds is approximately 25% longer than the engine burn duration in flight and was carried out at the ISRO Propulsion Complex, Mahendragiri.
ISRO will use the engine to power the cryogenic stage (C25) of the next-generation GSLV MK-III launch vehicle that’s capable of carrying four-tonne class satellites.
A cryogenic engine utilises liquid fuels – Liquid Hydrogen (LH2) at 20 Kelvin (-253 deg C) and Liquid Oxygen (LOX) at 80K (-193 deg C).
The engine wasn’t just designed and developed in India but also the fabrication of major subsystems was done through local industries.
Compared to the cryogenic engine tested in the GSLV MK-II, the new engine boasts of a higher propellant loading – 27 tonnes versus 12.5 tonnes, and also higher engine thrust – 19 tonne versus 7.5 tonne.