Expendable launch system
An expendable launch system (or expendable launch vehicle/ELV) is a launch vehicle that can be launched only once, after which its components are either destroyed during reentry or discarded in space. ELVs typically consist of several rocket stages that are discarded sequentially as their fuel is exhausted and the vehicle gains altitude and speed. Most satellites and human spacecraft are currently[when?] launched on ELVs. ELVs are simpler in design than reusable launch systems and therefore may have a lower production cost. Furthermore, an ELV can use its entire fuel supply to accelerate its payload, offering greater fuel efficiency. ELVs are proven technology in wide-spread use for many decades. ELVs are usable only once, and therefore have a significantly higher per-launch cost than reusable vehicles. New reusable launch systems under development by private companies such as SpaceX and Blue Origin have the potential to obsolete many existing ELVs due to the lower per-launch costs of reusable rockets.
Arianespace produces, operates and markets the Ariane launcher family. Arianespace's 23 shareholders represent scientific, technical, financial and political entities from 10 different European countries.
All of the Russian space sector has been renationalized, starting in 2013 with the formation of the United Rocket and Space Corporation to consolidate a large number of disparate companies and bureaus. On 19 May 2015 State Duma passed a bill creating the Roscosmos State Corporation, further consolidating the industry.
Several governmental agencies of the United States purchase ELV launches. NASA is a major customer with the Commercial Resupply Services and Commercial Crew Development programs, also launching scientific spacecraft. A state-owned ELV, the Space Launch System, is intended to being flying in 2020 or 2021.
The United States Air Force is also an ELV customer. Both the Delta IV and Atlas V from the 1994 Evolved ELV (EELV) program remain in active service, operated by the United Launch Alliance. The National Security Space Launch (NSSL) competition is currently ongoing to select EELV successors to provide assured access to space.
- Comparison of orbital launch systems
- Comparison of orbital launchers families
- Launch vehicle
- Lists of rockets
- Spacecraft propulsion
- "Expendable Launch Vehicles". spacetethers.com. Retrieved 2018-12-31.
- Arianespace: milestones Accessed 26 April 2017
- Arianespace: shareholders Archived 2014-10-08 at the Wayback Machine
- company-profile (appears to give different shareholdings from those in main text); arianespace.com Accessed 26 April 2017
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- Messier, Doug (2013-10-09). "Rogozin Outlines Plans for Consolidating Russia's Space Industry". Parabolic Arc. Retrieved 2014-09-11.
- Messier, Doug (2014-01-05). "Big Changes Ahead for the Russia Space Program in 2014". Parabolic Arc. Retrieved 2014-09-11.
- "Draft Law on setting up public corporation "Roscosmos" unanimously supported by the RF DUMA" (Press release). S.P. Korolev Rocket and Space Corporation Energia. 20 May 2015. Retrieved 19 June 2015.
- Berger, Eric (17 July 2019). "NASA's large SLS rocket unlikely to fly before at least late 2021". Ars Technica. Retrieved 28 August 2019.
- Boeing, Lockheed Martin to Form Launch Services Joint Venture | SpaceRef - Your Space Reference