Each of the three potential Single Stage to Orbit (SSTO) Rocket RLV

configurations are represented side-by-side in actual scale. The configurations
are shown from left to right:

  1. A lifting body SSTO concept (Vertical Takeoff / Horizontal Landing).

  2.  A wing body SSTO concept (Vertical Takeoff / Horizontal Landing). The
     concept shown is powered by seven tripropellant engines. The boost phase
     of the flight uses RP-1 (kerosene), liquid hydrogen and liquid oxygen. The
     second phase uses only LH2 and LO2.

  3. A vertical takeoff/vertical landing SSTO configuration. The concept shown
     uses liquid hydrogen and liquid oxygen.