India will carry out a test launch of the heaviest variant of its Geosynchronous Satellite Launch Vehicle (GSLV), the Mk. 3, in April. “The rocket will have a passive cryogenic engine,” Indian Space Research Organization (ISRO) Chairman K. Radhakrishnan says. The Mk. 3, an advanced version of the GSLV, is designed to launch communications satellites weighing more than 4 metric tons (8,800 lb.). The chief objective of the mission “will be to study the aerodynamics and stability of the ...


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