Propulsion Manufacturers
| Company name | Country | Engine | Engine type | Comments | |
|---|---|---|---|---|---|
| Aerojet | Rancho Cordova, California United States | Numerous | Numerous liquid engines (e.g. Space Shuttle Orbital Maneuvering System) and solid motor rockets (e.g. Atlas V SRB) | Division of GenCorp. | |
| American Rocket Company | United States | hybrid rocket | intellectual property acquired by SpaceDev | ||
| Frontier Astronautics | Valencia, CA United States | VIPER | liquid oxygen | ||
| Asp | high test peroxide | ||||
| AE Aerospace | Louisville, KY United States | HIRE | hybrid ion rocket engine | ||
| Orion Propulsion | Madison, AL United States | used on Sundancer and Ares I | |||
| Rocketdyne | Canoga Park, Los Angeles United States | Liquid | Acquired By Aerojet, Formerly a Division of Pratt & Whitney | ||
| Ad Astra Rocket Company | Webster, TX United States | VASIMR | magnetoplasma | may be used for future Mars missions | |
| Reaction Engines Ltd. | Oxfordshire, England United Kingdom | SABRE | rocket/turbojet/ramjet | planned to be used in Skylon | |
| SpaceDev | Poway, CA United States | hybrid rocket | used on SpaceShipOne and SpaceShipTwo | ||
| SpaceX | Hawthorne, California, United States | Numerous | Merlin/ Raptor / Draco / Kestrel | used on Falcon Rockets | |
| Snecma | Courcouronnes, France | Numerous | Vinci / Viking / Vulcain / HM7B | used on Ariane rockets |
Read more about this topic: List Of Spacecraft Manufacturers
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