Aerojet Rocketdyne

Short description: American Aerospace & Defense Company

Aerojet Rocketdyne

Type| Subsidiary
Industry| Aerospace and Defense
Predecessor| Aerojet
Pratt & Whitney Rocketdyne
Founded| 2013
Headquarters|

Sacramento, California

U.S.

Key people

| Eileen Drake (CEO and President)
Products| Rocket motor and missile propulsion

Number of employees

| 5,000[1]
Parent| Aerojet Rocketdyne Holdings
Website| www.rocket.com

Aerojet Rocketdyne is an American manufacturer of rocket, hypersonic, and electric propulsive systems for space, defense, civil and commercial applications.[2][3] Headquartered in Sacramento, California,[4] the company is owned by Aerojet Rocketdyne Holdings. Aerojet Rocketdyne was formed in 2013 when Aerojet (then owned by GenCorp) and Pratt & Whitney Rocketdyne were merged, following the latter's acquisition by GenCorp from Pratt & Whitney.[5][6] On April 27, 2015, the name of the holding company, GenCorp, was changed from GenCorp, Inc. to Aerojet Rocketdyne Holdings, Inc.[7]

Lockheed Martin announced plans to take over Aerojet Rocketdyne on December 20, 2020 as part of a $4.4 billion acquisition; however, this was abandoned by Lockheed on February 13, 2022 after opposition from Raytheon led the FTC to move to block the acquisition.[8][9][10][11]

On December 18 2022, L3Harris Technologies announced an agreement to acquire Aerojet Rocketdyne for $4.7 billion.[12] The deal was approved by Aerojet Rocketdyne shareholders on March 16, 2023.[13]

## Contents

* 1 Products
* 1.1 Current engines
* 1.2 Former production engines and others
* 1.3 In development
* 1.3.1 X3 Ion Thruster
* 1.4 Other notable products
* 1.4.1 Multi-mission Radioisotope Thermoelectric Generator
* 2 See also
* 3 References
* 4 External links

## Products

RS-25 engines

### Current engines

* RS-25 (LH2/LOX) – Previously known as the Space Shuttle main engine (SSME), it was the reusable main engine developed by Rocketdyne for the now-retired Space Shuttle. Remaining RS-25D engines are planned for use on early Space Launch System rocket launches after which an expendable version, RS-25E will be developed for follow-on SLS launches.
* RL10 (LH2/LOX) – Developed by Pratt & Whitney and currently used on both the upper stage of the Delta IV rocket as well as the Centaur upper stage for the Atlas V. It is also currently used on the Space Launch System on the Interim Cyrogenic Propulsion Stage (ICPS) and will be used on the Exploration Upper Stage (EUS) in the future. Formerly used on the Centaur upper stage for Titan, the Saturn I, and on the vertical-landing McDonnell Douglas DC-X "Delta Clipper". It was intended to serve as the main propulsion engine for the proposed Altair lunar lander.
* RS-68 (LH2/LOX) – First stage engine for the Delta IV, designed as a simplified version of the RS-25 due to its expendable usage. It is the largest hydrogen-fueled rocket engine ever flown.
* MR103G — 0.2 lb Hydrazine monopropellant thruster
* MR111g — 1 lb Hydrazine monopropellant thruster
* MR106L — 5-7 lb Hydrazine monopropellant thruster
* MR107M — 45 lb Hydrazine monopropellant thruster
* Blue Origin CCE (solid rocket motor or SRM) — the Blue Origin New Shepard Crew Capsule Escape Solid Rocket Motor is built by Aerojet Rocketdyne.[14]

### Former production engines and others

Rocketdyne F-1 engines on the Apollo Space Program'sSaturn V first stage

* Rocketdyne F-1 (RP-1/LOX) The main engine of the Saturn V rocket of the Apollo Space Program. The most powerful single combustion chamber liquid-propellant rocket engine ever developed.[15]
* Rocketdyne J-2 (LH2/LOX) Used on upper stage of Saturn IB and second and upper stages of Saturn V.
* SJ61 (JP-7/ingested air) A dual-mode ramjet/scramjet engine flown on the Boeing X-51 hypersonic demonstration vehicle.
* AJ10 (Aerozine 50/N2O4) Second stage engine for the Delta II, used as the Orbital Maneuvering System (OMS) engine for the Space Shuttle, and the main engine for the European Orion Service Module.
* AR1 (RP-1/LOX) A proposed 500,000-pound-force-class (2,200 kN) thrust RP-1/LOX oxidizer-rich staged combustion cycle engine.[16]
* Rocketdyne H-1 (RP-1/LOX) A first stage engine flown on the Saturn I and Saturn IB launch vehicles.
* RS-27 (RP-1/LOX) A first stage engine flown on the Delta 2000 launch vehicle
* RS-27A (RP-1/LOX) A first stage engine flown on the Delta II and Delta III
* J-2X (LH2/LOX) An engine that was originally being developed for the Ares I's upper stage before the cancellation of the Constellation program. The engine was considered for the Space Launch System's Exploration Upper Stage before being replaced with a cluster of four RL10s. It is based on the Rocketdyne J-2.
* Baby Bantam (kerosene/LOX) An 22 kN (5,000 lbf) thrust engine.[17] In June 2014, Aerojet Rocketdyne announced that they had "manufactured and successfully tested an engine which had been entirely 3D printed."
* AJ-26 (RP-1/LOX) Rebranded and modified NK-33 engines imported from Russia . Used as first stage engine for the Antares before being replaced by the RD-181.
* AJ-60A (Solid - HTPB) A solid rocket motor formerly used for the Atlas V launch vehicle, until being replaced by the Northrop Grumman GEM-63 in 2021 [18]
* AR-22 (Hydrogen/LOX) An engine in development from 2017-2020 for the XS-1 spacecraft, also known as the Phantom Express. The engine is based on the RS-25 and utilizing parts remaining in Aerojet Rocketdyne and NASA inventories from earlier versions of the RS-25. Two of the engines would have been built for the spaceplane.[19] Boeing pulled out of the project in January 2020, effectively ending it.[20]

### In development

#### X3 Ion Thruster

On 13 October 2017, it was reported that Aerojet Rocketdyne completed a keystone demonstration on a new X3 ion thruster, which is a central part of the XR-100 system for the NextSTEP program.[21][22] The X3 ion thruster was designed by the University of Michigan[23] and is being developed in partnership with the University of Michigan, NASA, and the Air Force. The X3 is a Hall-effect thruster operating at over 100 kW of power. During the demonstration, it broke records for the maximum power output, thrust and operating current achieved by a Hall thruster to date.[21] It operated at a range of power from 5 kW to 102 kW, with electrical current of up to 260 amperes. It generated 5.4 Newtons of thrust, "which is the highest level of thrust achieved by any plasma thruster to date."[21][24] A novelty in its design is that it incorporates three plasma channels, each a few centimeters deep, nested around one another in concentric rings.[22] The system is 227 kg (500 lb) and almost one meter in diameter.[21]

### Other notable products

#### Multi-mission Radioisotope Thermoelectric Generator

Aerojet Rocketdyne is the prime contractor to the US Department of Energy for the Multi-mission Radioisotope Thermoelectric Generator. The first flight MMRTG is currently powering the Mars Curiosity Rover, and a second flight unit powers the Perseverance Rover.[citation needed]

## See also

## References

1. ↑ Lockheed Martin to Acquire Aerojet Rocketdyne | IndustryWeek
2. ↑ "Hypersonics | Aerojet Rocketdyne". https://www.rocket.com/defense/hypersonics.
3. ↑ Stone, Mike (25 January 2022). "U.S. FTC to sue to block Lockheed Martin's $4.4 billion Aerojet deal". Reuters. https://www.reuters.com/business/aerospace-defense/lockheed-martins-aerojet-buy-displeases-antitrust-regulator-company-says-2022-01-25/.
4. ↑ "Locations" Aerojet Rocketdyne
5. ↑ "Two engine rivals merge into Aerojet Rocketdyne". Spaceflight Now. 18 June 2013. http://spaceflightnow.com/news/n1306/18aerojet/.
6. ↑ Roop, Lee (June 17, 2013). "Here's how Aerojet Rocketdyne might bring 5,000 new aerospace engineering jobs to Huntsville". Alabama Media Group. http://www.al.com/business/index.ssf/2013/06/heres_why_aerojet_could_dangle.html.
7. ↑ "History". Aerojet Rocketdyne Holdings, Inc. http://aerojetrocketdyne.com/content/history.
8. ↑ Erwin, Sandra (December 20, 2020). "Lockheed Martin to acquire Aerojet Rocketdyne for $4.4 billion". Space News. https://spacenews.com/lockheed-martin-to-acquire-aerojet-rocketdyne-for-4-4-billion/.
9. ↑ Erwin, Sandra (February 17, 2021). "Raytheon to challenge Lockheed Martin's acquisition of Aerojet Rocketdyne". Space News. https://spacenews.com/raytheon-to-challenge-lockheed-martins-acquisition-of-aerojet-rocketdyne/.
10. ↑ "Federal Trade Commission blocks Lockheed Martin's acquisition of Aerojet Rocketdyne.". 25 January 2022. https://spacenews.com/federal-trade-commission-likely-to-block-lockheed-martins-acquisition-of-aerojet-rocketdyne/.
11. ↑ "Lockheed Martin Terminates Agreement to Acquire Aerojet Rocketdyne" (in en-us). https://news.lockheedmartin.com/2022-02-13-Lockheed-Martin-Terminates-Agreement-to-Acquire-Aerojet-Rocketdyne.
12. ↑ Erwin, Sandra (2022-12-18). "L3Harris to acquire Aerojet Rocketdyne for $4.7 billion" (in en-US). https://spacenews.com/l3harris-to-acquire-aerojet-rocketdyne-for-4-7-billion/.
13. ↑ "L3Harris Statement on Aerojet Rocketdyne Shareholder Vote | L3Harris® Fast. Forward." (in en). https://www.l3harris.com/newsroom/press-release/2023/03/l3harris-statement-aerojet-rocketdyne-shareholder-vote.
14. ↑ "Aerojet Rocketdyne Motor Plays Key Role in Successful Blue Origin In-Flight Crew Escape Test". SpaceRef.com. 6 October 2016. http://www.spaceref.com/news/viewpr.html?pid=49635.
15. ↑ W. David Woods, How Apollo Flew to the Moon, Springer, 2008, ISBN:978-0-387-71675-6, p. 19
16. ↑ "AR1 Booster Engine". Aerojet Rocketdyne. http://www.rocket.com/ar1-booster-engine.
17. ↑ "Aerojet Rocketdyne 3D Prints An Entire Engine in Just Three Parts". 3dprint.com. 2014-06-26. http://3dprint.com/7355/3d-printed-engine/.
18. ↑ Clark, Stephen. "Atlas 5 rocket launches infrared missile detection satellite for U.S. Space Force – Spaceflight Now" (in en-US). https://spaceflightnow.com/2021/05/18/atlas-5-rocket-launches-infrared-missile-detection-satellite-for-u-s-space-force/.
19. ↑ "Aerojet Rocketdyne Selected As Main Propulsion Provider for Boeing and DARPA Experimental Spaceplane". 24 May 2017. http://www.rocket.com/article/aerojet-rocketdyne-selected-main-propulsion-provider-boeing-and-darpa-experimental.
20. ↑ "Farewell, Phantom Express: Boeing is pulling out of DARPA space plane program". 20 January 2020. https://news.yahoo.com/farewell-phantom-express-boeing-pulling-212831771.html.
21. ↑ 21.0 21.1 21.2 21.3 Pultarova, Tereza (13 October 2017). "Ion Thruster Prototype Breaks Records in Tests, Could Send Humans to Mars". Space. https://www.space.com/38444-mars-thruster-design-breaks-records.html.
22. ↑ 22.0 22.1 Mcalpine, Katherine (19 February 2016). "Hall thruster a serious contender to get humans to Mars". PhysOrg. https://phys.org/news/2016-02-hall-thruster-contender-humans-mars.html.
23. ↑ PEPL Thrusters: X3 University of Michigan. 2017.
24. ↑ Wall, Mike (26 April 2016). "Next-Gen Propulsion System Gets $67 Million from NASA". Space. https://www.space.com/32692-solar-electric-propulsion-asteroid-mars.html.

## External links

* Aerojet Rocketdyne official site
* Aerojet Rocketdyne Holdings site

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