It has taken longer than expected but Burt Rutan and Richard Branson have finally unveiled Spaceship Two , the launch vehicle for their Virgin Galactica sub - orbital tourist venture . The plane has been built by Scaled Composites , using a related design to the launch vehicle , Spaceship One , that contributed to the Ansari X Prize . WhiteKnightTwo is a dual - hull quad - engine aircraft roughly three times larger than the original WhiteKnight . WK2 employs a different tail construction , using a cruciform instead of the WK 's " T " style . The engines and cockpits are also located in different areas compared to the original WhiteKnight .

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