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Hydrogen is a resource and viable fuel in KSP 2. As a fuel, it is used exclusively by hydrogen-burning nuclear engines, such as the LV-N "Nerv". It is the lowest density fuel available, requiring significant amounts on a vessel to generate large amounts of Δv.
List of all the hydrogen engines currently in KSP2:
| Image | Name | Mass (t) | Max Thrust: 1 atm (kN) | Max Thrust: vac. (kN) | ISP: 1 atm (s) | ISP: Vac. (s) | Size |
|---|---|---|---|---|---|---|---|
 |
LV-N "Nerv" | 3.000 | 20.8 | 75.0 | 250 | 900 | SM
|
 |
LV-SW "SWERV" | 10.000 | 154.5 | 700.0 | 320 | 1450 | LG
|