Helium is used in cryogenic engines that use oxygen and hydrogen as fuel, such as the Geosynchronous Satellite Launch Vehicle (GSLV) Mark III that will carry Chandrayaan-2, in pressuring the propellant tank to keep it from collapsing and to prevent the formation of bubbles.
from Hindustan Times - india https://ift.tt/2Sicvrz
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» Chandrayaan-2 may get a 2nd shot after fixing snag
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