AR1 Booster Engine

Leveraging more than $300 million invested in rocket engine development over the last two decades, the Aerojet Rocketdyne AR1 incorporates the latest advances in rocket engine technology, materials science and modern manufacturing techniques to deliver an affordable and reliable booster engine to meet current and future U.S. space launch needs.

Having an American-designed and built booster engine in production would enable the U.S. to end its current dependence on foreign engine suppliers to launch some of its most important national security, civil and NASA payloads to orbit.

Using an advanced oxidizer-rich staged combustion engine cycle, the liquid oxygen/kerosene AR1 will generate 500,000 lbf of thrust at sea level. The thrust class enables the engine to be easily configured for use on multiple launch vehicles, including the Atlas V and the Advanced Boosters being considered for NASA’s Space Launch System.

The AR1 also will be an affordable propulsion solution, enabling U.S. launch vehicle providers to be more competitive in the world marketplace. Low production costs will be realized by incorporating the latest manufacturing technologies such as additive manufacturing (3D printing), white light inspection and low-cost brazing and forming – all of which have recently been proven on other Aerojet Rocketdyne rocket engine programs.

Aerojet Rocketdyne is the industry leader in building liquid-propellant rocket engines and is well positioned to bring this engine to market quickly and affordably. With more than 60 years of experience in the space launch industry, Aerojet Rocketdyne has built and launched thousands of rocket engines with unparalleled reliability. This remarkable track record, along with our outstanding engineering workforce, gives the nation confidence that a flight-ready AR1 rocket engine can be qualified approximately four years after program inception.

AR1 at a Glance

  • All-American design and production
  • Advanced oxygen-rich staged combustion kerosene technology
  • 500,000 lbf thrust (sea level)
  • Propellants: Liquid-oxygen (Lox)/Kerosene (RP-1)
  • Configured to accommodate multiple applications
  • Fast-paced and affordable development
  • Advanced low-cost manufacturing techniques

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