Marukyuu

Designed essentially as an aerodynamic cargo bay, the Marykyuu is a reusable Mars lander meant to have precise control over its landing location using aerodynamics. It lands in horizontal orientation on skis which later tilt it into a vertical position to launch back to Mars orbit. This also requires that the engines can pivot 90 degrees, and they are mounted on Harrier-like pods for this purpose. Four engines are mounted on these pods while two are in a fixed position in the tail, as the Marukyuu is much heavier launching back to orbit than it is on landing. Mars’ atmospheric drag means that it can use a relatively small amount of propellant to land, but needs to be fully fueled to reach orbit again. This system therefore requires the use of an in-situ resource utilization (ISRU) system producing methane and oxygen on the surface of Mars in order to refuel prior to returning to orbit.

Length: 21.6 meters
Wingspan: 13.5 meters
Height (gear retracted): 7.7 meters

Mass
Fueled: 68.9 tons
Dry: 21.58 tons

Propellant:
24765.8 liters liquid methane
32234.2 liters liquid oxygen

Engines:
4 x Marukyuu Vectoring Engines
80 kN thrust each (vac.)
353.6 s ISP vacuum
CH4 and LOX

2 x SE-2008AV Tail Engines
70 kN thrust each (vac.)
367.3 s ISP vacuum
CH4 and LOX