[[Imej:SpaceShipOne-09G.jpg|thumb|200px|right|Penerbangan tanpa kuasa 09G membawa SpaceShipOne merentasi [[Gurun Mojave]] untuk ujian aerodinamik.]]
is a privately funded experimental [[spaceplane]] developed by [[Burt Rutan]] 's company, [[Scaled Composites]], in their [[Tier One]] program, as their entry in the [[ Ansari X Prize]] competition. Pada [[ June 21|21 Jun]] [] it made the first privately-funded [[human spaceflight]].
is designed as a [[suborbital]] spacecraft, meaning it will achieve sufficient [[altitude]] to reach space but not sufficient [[speed]] to sustain [[orbit]]. It is designed to exceed [[1 E5 m|100 km]] altitud, which is the international definition of the [[boundary to space]] and the threshold required to win the X Prize. SpaceShipOne berkongsi some features from earlier [[ list of rocket planes| rocket planes]].
Ia menggunakan motor berasaskan [[hybrid rocket|enjin hibrid]] direka oleh [[SPACEDEV Inc.]], menggunakan bahan api pepejal '[[hydroxy-terminated polybutadiene]]' ([[getah]]) dengan cecair [[nitrous oxide]] sebagai pengoksida.