Proton KM-4 Briz M

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Proton KM-4 Briz M

Part of Briz stage series

N2O4/UDMH propellant rocket stage. New upper stage for Proton, replacing Energia Corporation's Block DM, making Proton an all-Khrunichev launch vehicle. The Khrunichev-built Briz-M upper stage is a derivative of the flight-proven Briz -K stage (as used on the Rokot booster).

AKA: Briz M. Status: Active. Thrust: 19.60 kN (4,406 lbf). Gross mass: 22,170 kg (48,870 lb). Unfuelled mass: 2,370 kg (5,220 lb). Specific impulse: 326 s. Burn time: 3,000 s. Height: 2.61 m (8.56 ft). Diameter: 2.50 m (8.20 ft). Span: 4.10 m (13.40 ft).

The Briz-M consists of a central cylinder and a jettisonable external propellant tank. Propellant carried is dependent on the specific mission requirements and is varied to maximize performance for the mission. The Briz-M is capable of operating, on-orbit, for a minimum of 24-hours and is controlled by a closed loop, triple redundant guidance system that is commandable in flight.

Family: Space Tugs. Country: Russia. Engines: 17D58E, 11D458, RDMT-400, RDMT-12, S5.98M. Launch Vehicles: Proton/Briz K/M, Proton-M/Briz-M. Propellants: N2O4/UDMH.

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