Sriharikota, June 14: After giving successful launches back to back, Indian Space Research Organisation ISRO set to launch an eco-friendly, kerosene-based semi-cryogenic engine by 2021. Recently ISRO had launched the Geosynchronous Satellite Launch Vehicle Mk-III (GSLV Mk-III)- the heaviest rocket successfully.
This new launch, the envisioned engine uses refined kerosene as a propellant, as opposed to the conventional combination of liquid hydrogen and liquid oxygen. However, liquid oxygen will still function as the oxidizer. An eco-friendly alternative, kerosene can be used after storing at a normal temperature, while the previous liquid hydrogen had to be stored at (-)253 degree Celsius.
"The idea is to replace the second stage of the GSLV Mk-III, which now uses a liquid stage, with the semi-cryo. The rocket will retain the cryogenic upper, third stage. The advantage of inducing the semi-cryogenic stage is the payload capacity of the GSLV Mk-III will increase from four tons to six tons. The ability to launch higher payload is commercially enticing proposition as well and put India among a select few countries with that capability," Group Captain Ajey Lele (Retd.), Senior Fellow at the Institute for Defence Studies and Analyses, New Delhi.