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Date: 2015-03-09 22:49:05Spacecraft propulsion Reusable launch system Liquid air cycle engine Single-stage-to-orbit Falcon Two-stage-to-orbit N1 Spaceplane Sputnik Aerospace engineering Space technology Spaceflight | Microsoft Word - RIspace_Paper_28(DSalt)_v6.docAdd to Reading ListSource URL: www.space-access.orgDownload Document from Source WebsiteFile Size: 1,25 MBShare Document on Facebook |