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Soyuz rocket background info FROM NASA PRESS KIT Posted: April 6, 2007 Throughout history, more than 1,500 launches have been made with Soyuz launchers to orbit satellites for telecommunications, Earth observation, weather, and scientific missions, as well as for human flights. The basic Soyuz vehicle is considered a three-stage launcher in Russian terms and is composed of:
First Stage Boosters The first stage's four boosters are assembled around the second stage central core. The boosters are identical and cylindricalconic in shape with the oxygen tank in the cone-shaped portion and the kerosene tank in the cylindrical portion. An NPO Energomash RD 107 engine with four main chambers and two gimbaled vernier thrusters is used in each booster. The vernier thrusters provide three-axis flight control. Ignition of the first stage boosters and the second stage central core occur simultaneously on the ground. When the boosters have completed their powered flight during ascent, they are separated and the core second stage continues to function. First stage separation occurs when the pre-defined velocity is reached, which is about 118 seconds after liftoff. Second Stage An NPO Energomash RD 108 engine powers the Soyuz second stage. This engine has four vernier thrusters, necessary for three-axis flight control after the first stage boosters have separated. An equipment bay located atop the second stage operates during the entire flight of the first and second stages. Third Stage The third stage is linked to the Soyuz second stage by a latticework structure. When the second stage's powered flight is complete, the third stage engine is ignited. Separation occurs by the direct ignition forces of the third stage engine. A single-turbopump RD 0110 engine from KB KhA powers the Soyuz third stage. The third stage engine is fired for about 240 seconds. Cutoff occurs at a calculated velocity. After cutoff and separation, the third stage performs an avoidance maneuver by opening an outgassing valve in the liquid oxygen tank. Launcher Telemetry Tracking & Flight Safety Systems Soyuz launcher tracking and telemetry is provided through systems in the second and third stages. These two stages have their own radar transponders for ground tracking. Individual telemetry transmitters are in each stage. Launcher health status is downlinked to ground stations along the flight path. Telemetry and tracking data are transmitted to the mission control center, where the incoming data flow is recorded. Partial real-time data processing and plotting is performed for flight following and initial performance assessment. All flight data is analyzed and documented within a few hours after launch. Baikonur Cosmodrome Launch Operations Soyuz missions use the Baikonur Cosmodrome's proven infrastructure, and launches are performed by trained personnel with extensive operational experience. Baikonur Cosmodrome is in the Republic of Kazakhstan in Central Asia between 45 degrees and 46 degrees north latitude and 63 degrees east longitude. Two launch pads are dedicated to Soyuz missions. Final Launch Preparations The assembled launch vehicle is moved to the launch pad on a railcar. Transfer to the launch zone occurs two days before launch. The vehicle is erected and a launch rehearsal is performed that includes activation of all electrical and mechanical equipment. On launch day, the vehicle is loaded with propellant and the final countdown sequence is started at three hours before the liftoff time. Rendezvous to Docking A Soyuz spacecraft generally takes two days to reach the space station. The rendezvous and docking are both automated, though once the spacecraft is within 150 meters (492 feet) of the station, the Russian Mission Control Center just outside Moscow monitors the approach and docking. The Soyuz crew has the capability to manually intervene or execute these operations. |
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The Russian Soyuz rocket that will launch the Expedition 15 crew of Fyodor Yurchikhin and Oleg Kotov, along with tourist Charles Simonyi, is rolled out to the pad at Baikonur Cosmodrome.
In advance of launching the Expedition 15 mission to the International Space Station, NASA officials preview the flight's objectives and challenges in this news briefing held March 27 at Johnson Space Center.
As the International Space Station's Expedition 14 winds down, officials managing the flight from Mission Control in Houston hold this retrospective briefing to talk about the mission.
NASA astronaut Suni Williams will run the Boston Marathon on a treadmill aboard the International Space Station. To preview the event, Williams, an accomplished marathoner, and Expedition 14 commander Michael Lopez-Alegria talk with The Boston Globe and the
New England Sports Network.
International Space Station Expedition 14 commander Michael Lopez-Alegria and flight engineer Suni Williams give a show-and-tell about the exercise equipment and routines aboard the orbiting complex.