In 2014, the U.S. government took a firm stand to end dependence on Russian engines. The president signed into law a measure requiring the United States to develop a domestically produced next-generation rocket propulsion system by 2019, in order to end reliance on the Russian RD-180 rocket engine used to power the nation's most reliable launch vehicle.

The AR1 engine is as close to a ‘drop-in’ replacement for the RD-180 as you can get and is configurable to multiple launch vehicles.

Aerojet Rocketdyne's AR1 engine is an example of capitalizing on proven, heritage launch systems coupled with today’s innovations to answer the urgent needs of national security.

Lowest Risk

Aerojet Rocketdyne is the only company in the U.S. that has ever developed and flown large booster engines.

Lowest Cost

AR1 requires minimal changes to infrastructure, launch operations and production facilities for the nation's most reliable launch vehicle. This adaptability offers the lowest cost to taxpayers.

Fastest Path

Rapid development and certification of the AR1 will take place at existing manufacturing and test facilities with delivery of a flight-qualified engine by 2019.