Originally Posted by
waito
And it's a bet on future. If the engine fails to meet the requirements, Airbus busts.
Maybe. But you cannot always continue doing what you have done since 30 years. Otherwise aircraft would still look like the Wright Flyer. And regarding Airbus getting bust over this engine, they are presently at the absolute peak of their corporate history. Order an A320 now and you can expect delivery not before 2031. When, if not now, is the right time to invest in the future? 20% gain in engine efficiency is the second largest leap forward since the evolution from turbojet to turbofan. And I am sure that in those days there were plenty of naysayers claiming that turbofan engines were full of potential problems due to their increased compexity...