Compare rockets
Pick up to 4 vehicles to compare specs and flight records side by side. Browse all →
| Specification | Firefly Alpha Firefly Aerospace × remove | Proton K/DM-2 Khrunichev State Research and Production Space Center × remove | Tsiklon-2 Yuzhnoye Design Bureau × remove |
|---|---|---|---|
| Flights | 7 | 110 | 105 |
| Success rate | 57.1% | 93.6% | 98.1% |
| Thrust | 736 kN | — | 2,366 kN |
| Height | 29.6 m | — | 39.7 m |
| Diameter | 1.82 m | — | 3 m |
| Launch mass | 54 t | — | 182 t |
| LEO capacity | 1,000 kg | — | 2,820 kg |
| GTO capacity | — | — | — |
| Launch cost | $15M | — | $12M |
| Reusable | No | No | No |
| Stages | 2 | — | 3 |