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Briz M

Credit - Khrunichev
Model: Rokot-3 Briz. Gross Mass: 6,565 kg (14,473 lb). Empty Mass: 1,600 kg (3,500 lb). Thrust (vac): 19.600 kN (4,406 lbf). Isp: 326 sec. Burn time: 1,000 sec. Propellants: N2O4/UDMH. Diameter: 2.50 m (8.20 ft). Span: 2.50 m (8.20 ft). Length: 1.30 m (4.20 ft). Country: Russia. No Engines: 1. Motor: S5.98M. Status: Active. Cost $ : 3.000 million. First Flight: 1990. Last Flight: 2006. No Launched: 11. Other designations: Briz K.

High performance storable liquid engine. The basic stage can be adapted with 'wrap-around' propellant tanks for Proton booster applications. Engine system consists of main engine plus four 11D458 plus twelve 17D58E vernier thrusters. Propellant load 3300 kg N2O4 + 1665 kg UDMH. Main engine: Capable of 8 restarts. Maximum burn time 1000 seconds; minimum time 1 second. Time between burns between 15 seconds and 5 hours. Vernier engines: 4 x 40 kgf. Specific impulse 275 sec. Minimum impulse 4 kg-s. Orientation engines: 12 x 1.3 kgf. Specific impulse 270 sec. Minimum impulse 0.068 kg-s. This, the basic version, had a total deliverable impulse of 2,000,000 kgf-s. Minimum impulse 2500 kg-s. Total summmary impulse 14,112 kg-s.

Model: Briz-KM. Gross Mass: 6,700 kg (14,700 lb). Empty Mass: 1,700 kg (3,700 lb). Thrust (vac): 19.600 kN (4,406 lbf). Burn time: 1,000 sec. Propellants: N2O4/UDMH. Diameter: 2.50 m (8.20 ft). Length: 2.50 m (8.20 ft). Country: Russia. No Engines: 1. Motor: S5.98M. Status: Active. First Flight: 1990. Last Flight: 2006. No Launched: 22. Used as: Briz. Release conditions: Krunichev.

Briz KM differs from Briz K in having 'compact' components, special payload truss for Globalstar dispenser. The truss is 1.8 m in diameter and has a volume of 8.8 m3.

Model: Angara Briz M. Gross Mass: 6,565 kg (14,473 lb). Empty Mass: 1,600 kg (3,500 lb). Thrust (vac): 19.600 kN (4,406 lbf). Isp: 326 sec. Burn time: 1,000 sec. Propellants: N2O4/UDMH. Diameter: 2.50 m (8.20 ft). Span: 2.50 m (8.20 ft). Length: 2.61 m (8.56 ft). Country: Russia. No Engines: 1. Motor: S5.98M. Status: In development. First Flight: 1994. Last Flight: 1999. No Launched: 2.

Version proposed as Angara upper stage. 8 restarts. Propellant ration 2.0:1.

Model: Proton KM-4 Briz M. Gross Mass: 22,170 kg (48,870 lb). Empty Mass: 2,370 kg (5,220 lb). Thrust (vac): 19.600 kN (4,406 lbf). Isp: 326 sec. Burn time: 3,000 sec. Propellants: N2O4/UDMH. Diameter: 2.50 m (8.20 ft). Span: 4.10 m (13.40 ft). Length: 2.61 m (8.56 ft). Country: Russia. No Engines: 1. Motor: S5.98M. Status: Active. First Flight: 1999. Last Flight: 2008. No Launched: 26. No Failed: 1. Other designations: Briz M.

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). 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.

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