Aerojet Rocketdyne announced this week it completed a successful critical design review for its AR1 rocket engine development and expects to begin full-scale testing next year. Meanwhile, the company is awaiting a decision from the Air Force on whether it will provide a second wave of development funding for the effort. The company is developing the AR1 as an alternative to the Russian-made RD-180 engine, which currently powers United Launch Alliance's Atlas V launch vehicle. ULA is building a new...
