The Next European Launcher Upper Composite
- Paper number
IAC-07-D2.3.05
- Author
Mr. Richard Pitt, Astrium GmbH, Germany
- Coauthor
Mr. Joerg Krueger, EADS Astrium GmbH, Germany
- Coauthor
Mrs. Catherine Poincheval, EADS Astrium, France
- Coauthor
Mr. Uwe Berkes, European Space Agency/Headquarters, France
- Coauthor
Mr. Jean-Marc Bahu, Centre National d'Etudes Spatiales (CNES), France
- Year
2007
- Abstract
Currently Arianespace as European Launch Service Provider is operating two principle versions of upper composites for the Ariane 5 launch system: the so called EPS and the ESC-A. Whereas the first one is an upper composite that is propelled by conventional storable propellants, the second one uses a cryogenic propulsion system which is at the forefront of existing European launcher technology and performance. The storable EPS stage also exists in a re-ignitable configuration for versatile missions with delayed boost or re-boost after a period of non-propelled flight and will be used for the ATV launch In order to prepare for the various market demands both in the near and long term future, European Space Transportation Industry together with Space Agencies have initiated the studies of three different launcher scenarios. • Ariane 5 Mid-Life Evolution: for both improved mission flexibility and increased payload masses, a new more powerful cryogenic upper composite is required. Different options include structural and under fairing / shroud versions. In addition a kick stage in association with the cryogenic stage is an envisaged alternative. • Building Block Launcher: this comprises existing building blocks from the different European launchers recombined to furnish a new launcher • New Generation Launcher: due to its later introduction into the launcher market, this launcher will take advantage of new technologies / capabilities that are not currently available For the above scenarios, a cryogenic upper stage is a promising candidate for performance, cost and mission flexibility The ability to develop a high performance re-ignitable upper composite depends on having the necessary related technologies at a mature level to enable their implementation. The technology readiness should be demonstrated prior to implementation into development programmes, in order to mitigate the risk and limit the development cost. This paper presents the actual status of the above subjects. The initial part details the mission requirements for the different launchers as well as the associated requirements for the upper composites. Derived from these, the various configurations of the upper composite versions are detailed together with their performance data. Finally a summary of the associated technologies and their status is given.
- Abstract document