One thing we have learned on this journey is how much low noise is to our customers and the wider community - we have yet to really put this under test and try and get a cost number against it i.e. how much more would you pay for a quieter engine?
What we do have is an opportunity to be much quieter, but there is always a penalty to pay in terms of size. For example, unlike a battery aircraft, we still have to provide the fuel cells with air and we can do that with large quiet ducts or small noisy ones - but larger ones take up valuable real estate and ultimately add weight to the system.
What I can say is we will design it to be quieter than current jet engines, but where we draw the line is tbd.
Fwiw, I love flying the B787 for many reasons, one of them being the low noise level. But… I wouldn’t go so far as to pay more money for it. The noise factor is not a decision driver, where seat size/leg room and service definitely are when it comes to choosing an airline/route.
I've never flown on a 787 sadly but I have to say that the Embraer E195-E2 was also surprisingly comfy. Much more comfy than a 737, and thus far small jets had been terrible in my experience. Noisy, especially the back of the 717 beside the engines, cramped. But the Embraer was spacious and modern <3
