Zegler, Frank; Bernard Kutter (2 de septiembre de 2010). «Evolving to a Depot-Based Space Transportation Architecture». AIAA SPACE 2010 Conference & Exposition. AIAA. Archivado desde el original el 24 de junio de 2014. Consultado el 25 de enero de 2011. «ACES design conceptualization has been underway at ULA for many years. It leverages design features of both the Centaur and Delta Cryogenic Second Stage (DCSS) upper stages and intends to supplement and perhaps replace these stages in the future. The baseline ACES will contain twice the Centaur or 4m DCSS propellant load, providing a significant performance boost compared to our existing upper stages. The baseline 41-mT propellant load is contained in a 5m diameter, common bulkhead stage that is about the same length as ULA's existing upper stages. ACES will become the foundation for a modular system of stages to meet the launch requirements of a wide variety of users. A common variant is a stretched version containing 73t of propellant.».
Zegler, Frank; Bernard Kutter (2 de septiembre de 2010). «Evolving to a Depot-Based Space Transportation Architecture». AIAA SPACE 2010 Conference & Exposition. AIAA. pp. 13-14. Archivado desde el original el 17 de julio de 2011. Consultado el 25 de enero de 2011. «for disposing of these obsolete or derelict spacecraft all [approaches] involve the expenditure of substantially more delta V than what has been traditional. It may well be required that old spacecraft be removed at the same time new spacecraft are being emplaced. ... [this architecture] anticipates the task of removing derelict spacecraft by providing an infrastructure to permit these high ΔV missions and enables the likely new paradigm of removing a spacecraft for each one deployed.».
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Zegler, Frank; Bernard Kutter (2 de septiembre de 2010). «Evolving to a Depot-Based Space Transportation Architecture». AIAA SPACE 2010 Conference & Exposition. AIAA. Archivado desde el original el 24 de junio de 2014. Consultado el 25 de enero de 2011. «ACES design conceptualization has been underway at ULA for many years. It leverages design features of both the Centaur and Delta Cryogenic Second Stage (DCSS) upper stages and intends to supplement and perhaps replace these stages in the future. The baseline ACES will contain twice the Centaur or 4m DCSS propellant load, providing a significant performance boost compared to our existing upper stages. The baseline 41-mT propellant load is contained in a 5m diameter, common bulkhead stage that is about the same length as ULA's existing upper stages. ACES will become the foundation for a modular system of stages to meet the launch requirements of a wide variety of users. A common variant is a stretched version containing 73t of propellant.».
Zegler, Frank; Bernard Kutter (2 de septiembre de 2010). «Evolving to a Depot-Based Space Transportation Architecture». AIAA SPACE 2010 Conference & Exposition. AIAA. pp. 13-14. Archivado desde el original el 17 de julio de 2011. Consultado el 25 de enero de 2011. «for disposing of these obsolete or derelict spacecraft all [approaches] involve the expenditure of substantially more delta V than what has been traditional. It may well be required that old spacecraft be removed at the same time new spacecraft are being emplaced. ... [this architecture] anticipates the task of removing derelict spacecraft by providing an infrastructure to permit these high ΔV missions and enables the likely new paradigm of removing a spacecraft for each one deployed.».
