Fuels and Energy
| Drive Type | Typical Isp (s) | Fuel Category | Cost | Infrastructure Dependence | Typical Role |
|---|---|---|---|---|---|
| Methalox Chemical | 350-380 | A | Low | Low | General-purpose launches and orbital transfers |
| Hydrolox Chemical | 430-460 | B | Medium | Low | High-performance launches, landers, and transfer craft |
| AluLOX Chemical | 300-350 | C | Low (Luna) | Low | Lunar shuttles and surface operations |
| HELL-V | 800-1200 | B | Medium | Very High | Surface-to-orbit launch |
| Nuclear Thermal Rocket (Hydrogen) | 850-950 | B | High | Low | Deep-space exploration and fast transport |
| Nuclear Thermal Rocket (Ammonia) | 350-450 | D | Medium | Low | Cargo transport and bulk freight |
| Laser Thermal | 1000-3000 | B, C, D | Low fuel cost | High | Laser Highway traffic |
| Laser Sail | — | None | Very Low fuel cost | Very High | Bulk cargo and long-duration transport |
| Code | Fuel Services |
|---|---|
| A | Methalox available |
| B | Hydrolox available |
| C | AluLOX available |
| D | Ammonia available |
| E | Laser Highway beam services available |