Technology · Item
Dewar of liquid hydrogen
The most efficient rocket fuel, but the lightest: a tank holds 2.3 times less of it.
In the game
How to get it
Gas plant, choice Liquid hydrogen: an empty dewar and 64 units of hydrogen, or 32 voxels of water, 30 s, 9 kW. On the Moon, Moon ice gives it with a dewar of LOX.
What it is for
A rocket fuel, burned with liquid oxygen: the best engine efficiency of the three.
Why it exists
Water is everywhere, even frozen on the Moon: hydrogen is the fuel you can make anywhere.
The same text the game shows in its progress tree and on the item's sheet (I).
How to get it
- Gas plant Liquid hydrogen: an empty dewar + 64 units of hydrogen or 32 voxels of water, 30 s, 9 kW.
- On the Moon: Moon ice gives a dewar of LOX and one of LH2 together.
Compared
| Propellant (with liquid oxygen) | Made | Notes |
|---|---|---|
| Liquid methane | gas plant: an empty dewar + 64 units of natural gas, 12 s | the balanced choice |
| RP-1 | refinery: an empty dewar + 64 voxels of kerosene, 15 s | the densest: most in a tank |
| Liquid hydrogen | gas plant: an empty dewar + 64 units of hydrogen (or 32 voxels of water), 30 s | the most efficient engine, but 2.3 times less in a tank |
On the progress path
CH4ChemistryMain path
One of the items of the step Gas plant.
- BeforeCH3 · Plastic
- This stepCH4 · Gas plant
- NextCH5 · Cement
FU2To the skyMain path
One of the items of the step Propellants.
- BeforeFU1 · Rocket parts
- This stepFU2 · Propellants
- NextFU3 · Fueling tower