One (or at least I) supposes that the Leap-X engine developed by Cfm has been done so in very close conjunction with Boeing.That is where the many 1,000's of sales will come from and indeed the key customer they have to look after.On that basis one imagines that the core has been sized with Boeing first to mind.This is not to say they will not - indeed have not looked for other applications - of course they have.
AS such I wonder whether the predicted design thrust of the engine might not be telling us something.
This engine (or at least the core) is designed to be the engine on (shall we say) the Boeing 797.
The Boeing 797 (shall we say) starts serious engineering in the latter part of the 2020's. It will therefore incorporate everything that is being developed today.The finest and latest innovations in carbon construction. (or if you are being difficult!) The use of AlLi. Either way strides will be made against the old adversry "Weight".
Also the ever developing power of comuters will further refine wing dynamics. If not totally laminar - certainly better. Fair?
So a lighter aircraft that has a more efficient lift. OK?
The thrust range of Cfm 56 engines used on the 737 are between 19,500 lbs and 27,300 lbs
From the origonal announcement of the Leap-X engine the design thrust range is. 25,000lbs - 30,000lbs
Does that not tell us a litte about what size (Pax) range Boeing is planning to build the 797?
Remember the newer,lighter,more lift efficient. much more fuel efficient plane would need less installed thrust for a given size.No?
So based on this.I predict that the 797 is already inked in to start at the present 737-800 size and end at a 757 size.
If the above is true (no doubt I have made a howler somewhere!) are they leaving the lower sector to Bombardier and the like? Looking at it's "success" so far I believe that this is the intention.