Understanding Launch Vehicles
How rockets reach orbit — twelve steps through fundamentals, stages, engines, propellants, human-rating, reusability, and the future of space transportation. Built on real launch-vehicle data; no fabricated performance figures.
- 1.1Rocket fundamentalsWhat a launch vehicle is, and how thrust overcomes gravity and drag to reach orbit.
- 1.2Escape velocityThe energy needed to leave orbit for the Moon and beyond — the domain of the most powerful rockets.
- 1.3Rocket stagesWhy rockets shed mass in stages — boosters, cores, and upper stages.
- 1.4Rocket enginesHow engines turn propellant into thrust, and the combustion cycles they use.
- 2.1PropellantsKerolox, hydrolox, methalox, hypergolics, and solids — the trade-offs of each.
- 2.2GuidanceHow a modern rocket steers itself to orbit — and, for Falcon 9, back to a landing.
- 2.3Payload fairingsThe nose cone that protects the payload through the atmosphere, seen on the large Ariane 5.
- 2.4Human-rated systemsWhat it takes to certify a rocket to carry crews safely.
- 3.1ReusabilityRecovering and re-flying hardware, from the Space Shuttle to Falcon 9 and Starship.
- 3.2Heavy liftThe vehicles that place 20+ tonnes into low Earth orbit.
- 3.3Deep-space launchSending payloads to the Moon and planets — the Saturn V and its super-heavy successors.
- 3.4Future transportationFully reusable and next-generation vehicles now in development.
Related entities
- Launch vehicle
Falcon 9
Falcon 9 is a partially reusable two-stage orbital launch vehicle developed and operated by SpaceX.
- Rocket engine
Merlin 1D
SpaceX's reusable RP-1/LOX gas-generator engine; nine power each Falcon 9 first stage and twenty-seven power the Falcon Heavy, with a vacuum variant on the upper stage.
- Rocket family
Falcon
SpaceX's family of RP-1/LOX rockets — the retired Falcon 1, the reusable Falcon 9, and the Falcon Heavy — that made orbital-class booster reuse routine.
- Launch vehicle
Saturn V
The Saturn V was a NASA super heavy-lift launch vehicle that carried the Apollo missions to the Moon and launched the Skylab space station.