India and Russia are set to begin development of a new version of the Brahmos II stealth cruise missile this year, which is expected to be capable of reaching speeds of M=7. Tests are expected to begin as early as next year. The Brahmos hypersonic missile will require an all-new high-performance propulsion engine to enable it to reach such high speeds and new structural materials to withstand high temperatures and vibrations
Source:
http://www.letectvi.cz/letectvi/Article72403.html
Source:
http://www.letectvi.cz/letectvi/Article72403.html