Soyuz/ST, Steps Forward to First Flight

Details Soyuz/ST, Steps Forward to First Flight Soyuz/ST, Steps Forward to First Flight

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002iaf..confe.971b&link_type=abstract

IAF abstracts, 34th COSPAR Scientific Assembly, The Second World Space Congress, held 10-19 October, 2002 in Houston, TX, USA.,

Computer Science

Performance

Scientific paper

The development of the Soyuz/ST launcher has entered a new phase with new engines qualification and majors ground tests completion for digital control system, upgraded third stage and Fregat. Modified engines for first and second stage have been successfully flown two times by May,21st 2001 andExpress spacecraft by May 2003. Following November, 25th 2001.modifications providing both additional dry mass Next steps will be 4Q02 with Progress-M to ISSsavings with optimized metallic structures and followed by a Soyuz/TM manned mission to ISS,increased propulsion performance has already started emphasizing the confidence gained during the engineat NPO-Lavotchkine to be fully ground qualified by qualification process.4Q03. In the mean time, ground qualification of the digitalThis sequenced introduction of modifications from control system goes forward with the completion ofthe Soyuz launcher to Soyuz2-1A and Soyuz2-1B equipment qualification by the end of 4Q01 and thecombined with upgraded Fregat upper stage, will beginning of integrated functional tests with groundallow to offer more and more mass performance and test benches and software. Rework of the launch padincreased flexibility with the large fairing of the N°4 in Plessetsk started 1Q02 to be fully operationalSoyuz/ST version. for the first launch of Soyuz 2 (version 1A) by 2Q03.All these upgrades are brought into operation with the Modified third stage including new control systemconfidence and schedule accuracy resulting both from elements and necessary structural adaptations for theknow how and extensive ground qualification. large ST fairing (diameter 4,11m, length 11,4m) and RD-0124 engine is currently under manufacturing atAs a result, STARSEM will be able to offer reliable the Progress plant for flight qualification on the firstand in time delivery to orbit for LEO, MEO and GTO launch of Soyuz 2-1A, paving the way for Soyuz/STmissions with the selected Soyuz/ST version based inaugural flight.on two main performance steps with Soyuz 2-1A for After test bench maintenance in September 2001,mid 2003 and Soyuz 2-1B for mid-2004. RD-0124 engine firing tests resumed to complete ground qualification program targeting Soyuz 2-1B by first launch 2Q04.

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