Generally descriptive of a reusable launch vehicle that uses an air-breathing first stage and a separate or parallel, rocket-propelled second stage. Examples include Sanger's space plane and Boeing's Beta. An alternative TSTO concept is the Kistler K-1.
Related entry single-stage-to-orbit
Related category ROCKETS, MISSILES, AND LAUNCH VEHICLES
Home • About • Copyright © The Worlds of David Darling • Encyclopedia of Alternative Energy • Contact