# launch vehicle

> rocket used to carry payload into outer space

**Wikidata**: [Q697175](https://www.wikidata.org/wiki/Q697175)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Launch_vehicle)  
**Source**: https://4ort.xyz/entity/launch-vehicle

## Summary
A **launch vehicle** is a rocket designed to carry a payload—such as satellites, spacecraft, or scientific instruments—into outer space. These vehicles are critical for space missions, enabling the deployment of technology for communication, research, and exploration beyond Earth's atmosphere.

## Key Facts
- **Primary function**: Carries payloads (e.g., satellites, cargo, or crewed spacecraft) into space.
- **Subclass of**: Rockets, specifically engineered for spaceflight.
- **Types**: Includes expendable (single-use) and reusable launch vehicles (e.g., SpaceX's Falcon 9).
- **Notable examples**:
  - **Saturn** (U.S.): Used in NASA's Apollo moon missions.
  - **Proton** (Soviet Union): Two-stage prototype for satellite launches.
  - **Energia** (Soviet Union): Heavy-lift launch vehicle.
  - **Safir** (Iran): Satellite rocket for orbital missions.
  - **Kuaizhou** (China): "Quick-reaction" orbital launch vehicles.
- **Part of space missions**: Functions as the "space segment" alongside ground and user segments.
- **Aliases**: Also called carrier rockets, space launch vehicles, or *lanzadera espacial* (Spanish).

## FAQs
### Q: What is the difference between a launch vehicle and a regular rocket?
A: A **launch vehicle** is a specialized rocket designed to deliver payloads (e.g., satellites) into space, while a general rocket may serve other purposes (e.g., military missiles or suborbital tests). Launch vehicles often have multiple stages and precise orbital insertion capabilities.

### Q: Are all launch vehicles reusable?
A: No. Most historical launch vehicles (e.g., Saturn, Proton) were expendable, but modern designs like SpaceX’s Falcon 9 and **reusable launch vehicles** are partially or fully recoverable to reduce costs.

### Q: What was the first launch vehicle?
A: The **Sputnik rocket** (1957) was the first to successfully place a satellite (Sputnik 1) into orbit. Earlier concepts like the **Nova series** (proposed in 1958) were never built.

### Q: Which countries have developed launch vehicles?
A: Major developers include the **U.S.** (Saturn, Titan), **Soviet Union/Russia** (Proton, Energia), **China** (Kuaizhou, Long March), **France** (Diamant), **India** (ASLV), and **Iran** (Safir).

### Q: What is a "heavy-lift" launch vehicle?
A: A heavy-lift launch vehicle (e.g., **Energia**, **Saturn V**) can carry exceptionally large payloads (20+ metric tons) to orbit, enabling missions like lunar landings or deep-space probes.

## Why It Matters
Launch vehicles are the backbone of space exploration and modern technology. They enable:
- **Global communications**: Deploying satellites for GPS, internet (e.g., Starlink), and broadcasting.
- **Scientific discovery**: Launching telescopes (e.g., Hubble, James Webb) and interplanetary probes.
- **National security**: Placing reconnaissance and defense satellites into orbit.
- **Commercial spaceflight**: Reducing costs via reusable designs (e.g., SpaceX, Blue Origin) and enabling private sector innovation.
- **Human spaceflight**: Transporting astronauts to the ISS, the Moon (Artemis program), and eventually Mars.

Without launch vehicles, space-based infrastructure—from weather forecasting to deep-space exploration—would not exist. Their evolution (e.g., reusability) is key to making space access more sustainable and affordable.

## Notable For
- **Historical milestones**:
  - **Saturn V** (U.S.): Powered the Apollo Moon landings (1969–1972).
  - **Energia** (Soviet Union): One of the most powerful rockets ever built (1980s).
- **Innovations in reusability**: Modern vehicles like **Falcon 9** and **LauncherOne** (Virgin Orbit) cut costs by recovering stages.
- **Diverse designs**:
  - **Air-launched rockets** (e.g., Pegasus II) deployed from aircraft.
  - **Quick-reaction vehicles** (e.g., China’s Kuaizhou) for rapid satellite deployment.
- **Global competition**: Nations develop indigenous launchers (e.g., India’s ASLV, Iran’s Safir) to reduce reliance on foreign providers.
- **Canceled concepts**: Some designs (e.g., **NEXUS**, **OmegA**) highlight the challenges of rocket development.

## Body
### Definition and Core Function
A **launch vehicle** is a rocket-propelled system engineered to transport payloads from Earth’s surface to outer space. Unlike ballistic missiles or sounding rockets, launch vehicles are optimized for achieving stable orbits or trajectories beyond Earth’s atmosphere.

### Classification
Launch vehicles are categorized by:
- **Propulsion type**: Solid-fuel (e.g., **Augmented Satellite Launch Vehicle**) or liquid-fuel (e.g., **H-I**).
- **Reusability**:
  - **Expendable**: Single-use (e.g., **Diamant**, **Scout**).
  - **Reusable**: Partially or fully recoverable (e.g., **SpaceX Falcon 9**).
- **Payload capacity**:
  - **Light-lift**: <2,000 kg (e.g., **Vector-R**).
  - **Heavy-lift**: >20,000 kg (e.g., **Saturn V**, **Energia**).

### Historical Development
- **Early vehicles**:
  - **V-2 rocket** (1940s): First human-made object to reach space (suborbital).
  - **Sputnik rocket** (1957): First orbital launch (USSR).
- **Cold War era**:
  - **Saturn family** (U.S.): Developed for Apollo program (1960s–70s).
  - **Proton** (USSR): Derived from ICBMs, used for Salyut and Mir stations.
- **Modern era**:
  - **Reusable systems**: SpaceX’s Falcon 9 (first stage landings since 2015).
  - **Commercial providers**: **LauncherOne** (Virgin Orbit), **Firefly Alpha**.

### Key Components
1. **Stages**: Most launch vehicles use multiple stages (e.g., 2–4) to shed weight and improve efficiency.
2. **Payload fairing**: Protects satellites/cargo during ascent.
3. **Guidance systems**: Ensure precise orbital insertion.
4. **Launch escape systems** (crew vehicles): E.g., **Little Joe** (Mercury program).

### Notable Programs and Vehicles
- **United States**:
  - **Titan**: Family of rockets used for military, NASA, and commercial payloads (1959–2005).
  - **Space Shuttle**: Partially reusable system (1981–2011).
- **Soviet Union/Russia**:
  - **Energia**: Designed for Buran shuttle and heavy payloads (1987–1988).
  - **Proton**: Workhorse for Russian space missions since 1965.
- **China**:
  - **Long March**: Series of expendable rockets (since 1970).
  - **Kuaizhou**: Solid-fuel, rapid-deployment vehicles (2013–present).
- **Europe**:
  - **Ariane**: ESA’s primary launch system (since 1979).
- **Private Sector**:
  - **Falcon 9** (SpaceX): First orbital-class reusable rocket.
  - **New Glenn** (Blue Origin): Upcoming heavy-lift reusable vehicle.

### Challenges
- **Cost**: Developing and operating launch vehicles requires massive investment (e.g., Saturn V cost ~$6.4 billion in 1960s dollars).
- **Reliability**: Failure rates historically ranged from 5–10% (modern vehicles aim for <1%).
- **Environmental impact**: Solid rockets release chlorine; kerosene/LOX engines produce CO₂.
- **Geopolitical factors**: Export controls (e.g., ITAR) limit international collaboration.

### Future Trends
- **Full reusability**: Starship (SpaceX) aims for fully reusable super-heavy lift.
- **Small-sat launchers**: Vehicles like **Vector-R** target the growing cubesat market.
- **Alternative propulsion**: Methane engines (e.g., Raptor) and hybrid systems.
- **Global expansion**: New entrants (e.g., **Tronador II** in Argentina, **Irtysh** in Russia).

## Schema Markup
```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "launch vehicle",
  "description": "rocket used to carry payload into outer space",
  "url": "https://en.wikipedia.org/wiki/Launch_vehicle",
  "sameAs": [
    "https://www.wikidata.org/wiki/Q48183",
    "https://en.wikipedia.org/wiki/Launch_vehicle"
  ],
  "additionalType": "https://www.wikidata.org/wiki/Q375"
}

## References

1. [Source](https://github.com/JohnMarkOckerbloom/ftl/blob/master/data/wikimap)
2. Freebase Data Dumps. 2013
3. BabelNet
4. National Library of Israel
5. KBpedia
6. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)