Usuari:Albert SN/proves: diferència entre les revisions

El [[Centre aeroespacial alemany]] va estudiar els [[impulsor de retorn líquid|impulsors de retorn líquid]] VTHL reutilitzables des de 1999. El disseny tenia l'objectiu de substituir els [[impulsor de coets sòlids|impulsors de coets sòlids]] de l'[[Ariane 5]].<ref name="DLRsiteLFBBmain">{{cite web|url=http://www.dlr.de/irs/desktopdefault.aspx/tabid-7582/12834_read-32243/|title=Liquid Fly-back Booster (LFBB)|publisher=DLR|accessdate=9 June 2015|url-status=dead|archiveurl=https://web.archive.org/web/20150610050518/http://www.dlr.de/irs/desktopdefault.aspx/tabid-7582/12834_read-32243/|archivedate=10 June 2015}}</ref> The [[Federal government of the United States|U.S. government]]-funded, {{currency|{{Formatprice|250000000}}|US}}, [[Reusable Booster System]] program, initiated by the USAF in 2010,<ref name=rlvst20100920>

{{cite news |title=Air Force studying reusable upper stage systems for reusable booster |url=http://hobbyspace.com/nucleus/index.php?itemid=23692 |accessdate=2011-03-24 |newspaper=RLV and Space Transport News |date=2010-09-20 |url-status=dead |archiveurl=https://web.archive.org/web/20110724204127/http://hobbyspace.com/nucleus/index.php?itemid=23692 |archivedate=2011-07-24 }}</ref>

{{cite news |last=Cogliano |title=Air Force launches $250M reusable booster initiative |url=http://www.bizjournals.com/dayton/news/2011/03/22/air-force-launches-250m-reusable.html |accessdate=2011-03-24 |newspaper=Dayton Business Journal |date=2011-03-22 |quote=''Officials anticipate awarding up to three contracts for the project, where winners would compete for individual tasks of experiments and demonstrations that address technology, processes and other attributes of a reusable booster system, or RBS. Air Force officials envision an RBS that includes a reusable rocket and an expendable upper stage rocket. The reusable rocket would be launched vertically and return, landing aircraft style on a runway, after carrying the space craft to a point where the expendable rocket could take over.''}}</ref>

{{cite news |last=Ferster |first=Warren |title=Prototype Reusable Rocket Effort Felled by U.S. Budget Woes |url=http://spacenews.com/launch/121019-prototype-reusable-rocket-felled.html |accessdate=2012-10-21 |newspaper=Space News |date=2012-10-19 }}{{enllaç no actiu|bot=InternetArchiveBot |fix-attempted=no |data=2020 }}</ref>