Aerojet Rocketdyne is working to eventually reduce the cost for each pair of AR1 engines from about $25 million to approximately $15 million, company officials recently confirmed. The company plans to offer the AR1 as a domestic propulsion source to replace the Russian-made RD-180 -- a congressional directive with a 2019 deadline. Aerojet is maturing the technology through a public-private partnership with the Air Force and the United Launch Alliance will consider it as an option to fuel its next-generation...
