Late last year, Safran completed a ground-test campaign with a full-scale counter-rotating open rotor (CROR) engine on an impressive outdoor testbed, almost 10 years after the launch of the demonstration program. The engine manufacturer now says the trials were highly successful, validating the concept for short- and medium-range commercial aircraft. But a cautious Airbus is not anticipating an A320neo successor until 2030. And Safran is facing another decade of work, this time focused on ...