Launch vehicle

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Russian Soyuz TMA-5 lifts off from the Baikonur Cosmodrome in Kazakhstan heading for the International Space Station
Comparison of launch vehicles. Show payload masses to LEO, GTO, TLI and MTO

A launch vehicle is typically a rocket-powered vehicle designed to carry a payload (a crewed spacecraft or satellites) from Earth's surface or lower atmosphere to outer space. The most common form is the ballistic missile-shaped multistage rocket, but the term is more general and also encompasses vehicles like the Space Shuttle. Most launch vehicles operate from a launch pad, supported by a launch control center and systems such as vehicle assembly and fueling.[1] Launch vehicles are engineered with advanced aerodynamics and technologies, which contribute to high operating costs.

An

elevation angles
greater than horizontal.

Practical orbital launch vehicles use

chemical propellants such as solid fuel, liquid hydrogen, kerosene, liquid oxygen, or hypergolic propellants
.

Launch vehicles are classified by their orbital payload capacity, ranging from small-, medium-, heavy- to super-heavy lift.

History

This paragraph is an excerpt from History of spaceflight.[edit]
Spaceflight began in the 20th century following theoretical and practical breakthroughs by Konstantin Tsiolkovsky, Robert H. Goddard, and Hermann Oberth, each of whom published works proposing rockets as the means for spaceflight.[a] The first successful large-scale rocket programs were initiated in Nazi Germany by Wernher von Braun. The Soviet Union took the lead in the post-war Space Race, launching the first satellite,[3] the first animal,[4]: 155  the first human[5] and the first woman[6] into orbit. The United States would then land the first men on the Moon in 1969. Through the late 20th century, France, the United Kingdom, Japan, and China were also working on projects to reach space.

Mass to orbit

Launch vehicles are classed by NASA according to low Earth orbit payload capability:[7]

Sounding rockets are similar to small-lift launch vehicles, however they are usually even smaller and do not place payloads into orbit. A modified SS-520 sounding rocket was used to place a 4-kilogram payload (TRICOM-1R) into orbit in 2018.[11]

General information

rocket equation. The physics of spaceflight are such that rocket stages are typically required to achieve the desired orbit.[citation needed
]

atmospheric reentry or on contact with the ground. In contrast, reusable launch vehicles are designed to be recovered intact and launched again. The Falcon 9 is an example of a reusable launch vehicle.[12] As of 2023, all reusable launch vehicles that were ever operational have been partially reusable, meaning some components are recovered and others are not. This usually means the recovery of specific stages, usually just the first stage, but sometimes specific components of a rocket stage may be recovered while others are not. The Space Shuttle, for example, recovered and reused its solid rocket boosters, the Space Shuttle orbiter that also acted as a second stage, and the engines used by the core stage (the RS-25, which was located at the back of the orbiter), however the fuel tank that the engines sourced fuel from, which was separate from the engines, was not reused.[citation needed
]

For example, the

Delta IV and Atlas V rockets.[citation needed
]

Launch platform locations

Sea launch by a Chinese company Orienspace

Launchpads can be located on land (

air.[citation needed
]

Flight regimes

See also: Sub-orbital spaceflight, Orbital spaceflight, Trans-lunar injection, and Interplanetary spaceflight

A launch vehicle will start off with its payload at some location on the surface of the Earth. To reach orbit, the vehicle must travel vertically to leave the

atmosphere and horizontally to prevent re-contacting the ground. The required velocity varies depending on the orbit but will always be extreme when compared to velocities encountered in normal life.[citation needed
]

Launch vehicles provide varying degrees of performance. For example, a satellite bound for

upper stage of the launch vehicle or launched to a geostationary transfer orbit (GTO). A direct insertion places greater demands on the launch vehicle, while GTO is more demanding of the spacecraft. Once in orbit, launch vehicle upper stages and satellites can have overlapping capabilities, although upper stages tend to have orbital lifetimes measured in hours or days while spacecraft can last decades.[citation needed
]

Distributed launch

Distributed launch involves the accomplishment of a goal with multiple spacecraft launches. A large spacecraft such as the

delta-V capabilities of a cislunar or deep space vehicle. Distributed launch enables space missions that are not possible with single launch architectures.[13]

Mission architectures for distributed launch were explored in the 2000s[14] and launch vehicles with integrated distributed launch capability built in began development in 2017 with the

energetic missions.[15]

Return to launch site

After 1980, but before the 2010s, two orbital launch vehicles developed the capability to return to the launch site (RTLS). Both the US Space Shuttle—with one of its abort modes[16][17]—and the Soviet Buran[18] had a designed-in capability to return a part of the launch vehicle to the launch site via the mechanism of

expendable, as had been the standard procedure for all orbital launch vehicles flown prior to that time. Both were subsequently demonstrated on actual orbital nominal flights, although both also had an abort mode during launch that could conceivably allow the crew to land the spaceplane following an off-nominal launch.[citation needed
]

In the 2000s, both SpaceX and Blue Origin have privately developed a set of technologies to support vertical landing of the booster stage of a launch vehicle. After 2010, SpaceX undertook a

landing platform at sea, some distance away from the launch site.[20] The Falcon Heavy is similarly designed to reuse the three cores comprising its first stage. On its first flight in February 2018, the two outer cores successfully returned to the launch site landing pads while the center core targeted the landing platform at sea but did not successfully land on it.[21]

suborbital New Shepard, and successfully demonstrated return in 2015, and successfully reused the same booster on a second suborbital flight in January 2016.[22] By October 2016, Blue had reflown, and landed successfully, that same launch vehicle a total of five times.[23] It must however be noted that the launch trajectories of both vehicles are very different, with New Shepard going straight up and down, whereas Falcon 9 has to cancel substantial horizontal velocity and return from a significant distance downrange.[citation needed
]

Both Blue Origin and SpaceX also have additional reusable launch vehicles under development. Blue is developing the first stage of the orbital New Glenn LV to be reusable, with first flight planned for no earlier than 2024. SpaceX has a new super-heavy launch vehicle under development for missions to interplanetary space. The SpaceX Starship is designed to support RTLS, vertical-landing and full reuse of both the booster stage and the integrated second-stage/large-spacecraft that are designed for use with Starship.[24] Its first launch attempt took place in April 2023; however, both stages were lost during ascent.[citation needed]

See also

Notes

  1. ^
    • Tsiolkovsky, 1903, Exploration of Outer Space by Means of Rocket Devices
    • Goddard, 1919, A Method of Reaching Extreme Altitudes
    • Oberth, 1923, Die Rakete zu den Planetenräumen

References

  1. ^ "NASA Kills 'Wounded' Launch System Upgrade at KSC". Florida Today. Archived from the original on 2002-10-13.
  2. ^ Hill, James V. H. (April 1999), "Getting to Low Earth Orbit", Space Future, archived from the original on 2012-03-19, retrieved 2012-03-18.
  3. ^ "Sputnik | Satellites, History, & Facts | Britannica". www.britannica.com.
  4. ^ Siddiqi, Asif A. (2000). Challenge To Apollo: The Soviet Union and The Space Race, 1945-1974.
  5. ^ "Yuri Gagarin: First Man in Space". NASA. Retrieved January 8, 2023.
  6. ^ "This Day in History: Soviet cosmonaut Valentina Tereshkova becomes the first woman in space". History.com. June 16, 1963. Retrieved January 8, 2023.
  7. ^ NASA Space Technology Roadmaps - Launch Propulsion Systems, p.11: "Small: 0-2t payloads, Medium: 2-20t payloads, Heavy: 20-50t payloads, Super Heavy: >50t payloads"
  8. ^ "Launch services—milestones". Arianespace. Retrieved 19 August 2014.
  9. ^ a b "Welcome to French Guiana" (PDF). arianespace.com. Arianespace. Archived from the original (PDF) on 23 September 2015. Retrieved 19 August 2014.
  10. ^ HSF Final Report: Seeking a Human Spaceflight Program Worthy of a Great Nation, October 2009, Review of U.S. Human Spaceflight Plans Committee, p. 64-66: "5.2.1 The Need for Heavy Lift ... require a “super heavy-lift” launch vehicle ... range of 25 to 40 mt, setting a notional lower limit on the size of the super heavy-lift launch vehicle if refueling is available ... this strongly favors a minimum heavy-lift capacity of roughly 50 mt ..."
  11. ^ "SS-520". space.skyrocket.de. Retrieved 2020-06-02.
  12. ^ Lindsey, Clark (28 March 2013). "SpaceX moving quickly towards fly-back first stage". NewSpace Watch. Retrieved 29 March 2013.
  13. ^ Kutter, Bernard; Monda, Eric; Wenner, Chauncey; Rhys, Noah (2015). Distributed Launch - Enabling Beyond LEO Missions (PDF). AIAA 2015. American Institute of Aeronautics and Astronautics. Retrieved 23 March 2018.
  14. ^ Chung, Victoria I.; Crues, Edwin Z.; Blum, Mike G.; Alofs, Cathy (2007). An Orion/Ares I Launch and Ascent Simulation - One Segment of the Distributed Space Exploration Simulation (DSES) (PDF). AIAA 2007. American Institute of Aeronautics and Astronautics. Retrieved 23 March 2018.
  15. ^ Foust, Jeff (29 September 2017). "Musk unveils revised version of giant interplanetary launch system". SpaceNews. Retrieved 23 March 2018.
  16. ^ "Return to Launch Site". NASA.gov. Retrieved 4 October 2016.
  17. ^ "Space Shuttle Abort Evolution" (PDF). ntrs.nasa.gov. 26 September 2011. Retrieved 4 October 2016.
  18. National Geographic. National Geographic Society. Archived from the original
    on April 15, 2016. Retrieved 4 October 2016.
  19. ^ Newcomb, Alyssa; Dooley, Erin (21 December 2015). "SpaceX Historic Rocket Landing Is a Success". ABC News. Retrieved 4 October 2016.
  20. ^ Sparks, Daniel (17 August 2016). "SpaceX Lands 6th Rocket, Moves Closer to Reusability". Los Motley Fool. Retrieved 27 February 2017.
  21. ^ Gebhardt, Chris (February 5, 2018). "SpaceX successfully debuts Falcon Heavy in demonstration launch from KSC – NASASpaceFlight.com". NASASpaceFlight.com. Retrieved February 23, 2018.
  22. ^ Foust, Jeff (22 January 2016). "Blue Origin reflies New Shepard suborbital vehicle". SpaceNews. Retrieved 1 November 2017.
  23. ^ Foust, Jeff (5 October 2016). "lue Origin successfully tests New Shepard abort system". SpaceNews. Retrieved 8 October 2016.
  24. ^ Foust, Jeff (15 October 2017). "Musk offers more technical details on BFR system - SpaceNews.com". SpaceNews.com. Retrieved February 23, 2018.

External links

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