The Briz is a family of Russian liquid-propellant rocket orbit insertion upper stages manufactured by Khrunichev State Research and Production Space Center and used on the Proton-M and Angara A5 space launch vehicles. These upper stages were also used on the Rokot space launch vehicle before its retirement in 2019.
The Briz-M is designed for injecting large payloads into a low, medium-height or high geosynchronous orbit. This is a twin upper stage consisting of a core module and a jettisonable add-on fuel tank surrounding the core.
The Briz-M is powered by the 14D30 pump-fed gimballed main engine. It can be restarted 8 times in flight and allows precision placement of the spacecraft into orbit. Orbital lifetime of the Briz-M is limited by available onboard battery power and is currently 24 hours. The total time of the standard Proton/Briz-M mission to geosynchronous orbit profile from lift-off to spacecraft separation is approximately 9.3 hours. Proton launch vehicle with a Briz-M upper stage can also inject payloads to Earth escape trajectories.
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