Table 1 Rough order of magnitude parameters for propellant depots in space

Depot type

dual fluid, 6 to 8 tanks

¹⁷

Capacity

50 t per tank

Diameter

5 m

Length

10 m to 20 m

Fluids

hydrogen, methane, oxygen

^11,114

Storage time

6 month to 12 month

²⁰

Acceleration

From microgravity to high-g

^8,17

Pressure

100 kPa to 350 kPa

^8,11

Conditioning

Autogeneous pressurization

^8,11,13,115

Heat flux

50 W m² to 100 W m²

^26,116

Transfer rate

0.15 kg s¹ to 4.4 kg s¹

^117,118

Wall material

Aluminum

²⁵