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Soyuz ST / Fregat ST
Part of R-7
Uprated Soyuz booster designed for commercial customers. Upgraded engines, modern avionics, reduced non-Russian content. Uses Fregat upper stage.

AKA: A-2;Sapwood;SL-4. Status: Active. First Launch: 2014-12-18. Last Launch: 2015-09-11. Number: 3 . Payload: 5,500 kg (12,100 lb). Thrust: 4,144.70 kN (931,766 lbf). Gross mass: 305,000 kg (672,000 lb). Height: 46.10 m (151.20 ft). Diameter: 2.95 m (9.67 ft). Apogee: 450 km (270 mi).

Also known as the Soyuz 2, it was a modernization of the Soyuz launcher that increased general performance. The basic launch vehicle design remained the same. Changes were limited to:

The standard fourth stage was the Fregat orbital module.

The Fregat upper stage has a flight-proved propulsion subsystem that is based on a single-chamber Lavochkin engine. Four clusters of three 50-N hydrazine thrusters provide attitude control. The Fregat propulsion system powered the Fobos probe to Mars, and the main engine was fitted on nearly 30 interplanetary spacecraft. During its numerous missions, the engine demonstrated the highest reliability under extreme conditions, exceeding technical specifications. This application of proven, in-production hardware ensures high reliability and lower cost for the Fregat upper stage. Fregat operates on UDMH fuel and N2O4 oxidizer, and has a liftoff mass of up to 6,535 kg. The weight at burnout is 950-1,100 kg.. Vacuum thrust is 19.6 kN., and burn time is up to 877 sec. The engine can be restarted as many as 20 times.

LEO Payload: 5,500 kg (12,100 lb) to a 450 km orbit at 51.80 degrees. Payload: 4,500 kg (9,900 lb) to a 800 km SSO. Launch Price $: 35.000 million in 1999 dollars.

Stage Data - Soyuz ST / Fregat ST



Family: orbital launch vehicle. Country: Russia. Engines: S5.92. Spacecraft: ELiTeBus, Galileo Navsat, Meteor-M. Launch Sites: Kourou ZLS, Baikonur, Plesetsk, Baikonur LC31, Kourou ELS, Plesetsk LC43. Stages: Fregat, Soyuz ST-0, Soyuz ST-1, Soyuz ST-2. Agency: Korolev bureau.

2014 December 18 - . 18:37 GMT - . Launch Site: Kourou. Launch Complex: Kourou ELS. LV Family: R-7. Launch Vehicle: Soyuz ST / Fregat ST.
2015 March 27 - . 21:46 GMT - . Launch Site: Kourou. Launch Complex: Kourou ELS. LV Family: R-7. Launch Vehicle: Soyuz ST / Fregat ST.
2015 September 11 - . 02:08 GMT - . Launch Site: Kourou. Launch Complex: Kourou ZLS. LV Family: R-7. Launch Vehicle: Soyuz ST / Fregat ST.

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