Lex

A smaller analogue to SpaceX’s Starship, meant to launch on the Unix (Raptor 9) rocket, the Lex
spacecraft only uses one Raptor 2 vacuum engine. It features a forward crew pod that can separate
from the propellant tanks in the rear and use a bank of six engines identical to the touchdown engines SpaceX will likely use on their Lunar Starship as an abort system. The crew pod is also fitted with parachutes.

While the Lex spacecraft currently features a more conventional aerodynamic and control system, in
contrast to Starship’s unique system, that may change.

Length: 35.3 meters
Wingspan: 14.9 meters
Body Diameter: 6.6 meters

Mass
Fueled: 272.63 tons
Dry: 31.04 tons

Main Engine:
1 x SpaceX Raptor 2 vacuum
2261.0 kN thrust (vac.)
377.7 s ISP vac.

Main Tank Propellant:
116337.7 liters liquid methane
162984.5 liters liquid oxygen
Forward Propellant (RCS and LES):
2992.7 liters liquid methane
4241.3 liters liquid oxygen