JetBuddy wrote:seahawk wrote:No, 10% better than the A321 is unlikely. The A321NEO is simply a very efficient plane, with engines fitting it nearly perfectly and with it just using all reserves left in the design, which makes it very efficient. A widebody can not beat this by 10%, especially not with engines only 1 generation newer. What a widebody can do is coming out slightly ahead in the long version and significantly more capable in the short version.
It's not as if the A321neo is some "magnum opus" for aircraft design. It's a 30 year old design with 30 year old technology and wings that are not even close to being optimal. The only thing being up to date about it are the engines.
No it is not, but with the new engines it is still a very efficient frame. And even the wing is not that bad with the new sharklets and all tiny modifications over the years. A lot of parts have changed over the years and many assemblies are already 3D printed of are moving towards it. When you look at the latest assembly line in Hamburg even the production line is state of the art.
The 797 on the other hand is supposed to by a 7 abreast widebody, that layout alone is less efficient than the single aisle when it comes the usage of available floor space. You also need a complex fuselage design or have a significantly larger fuselage diameter and even with latest production methods it still is a challenge to come close in OEW per seat to the simple A320 fuselage. And if we look at the engines 5% better specific fuel burn would be quite an achievement compared to a 2025 A320 engine, even more so if it is just a scaled up LEAP. And then all of this needs to be done without making this widebody much more expensive to produce.
If one believes a 10% improvement over the A321NEO is possible with a wide body, the 737MAX would have been the worst decision ever made by Boeing, because a NSA for 2025 should the be able to beat the A321 by 12-15% and would beat the 737-10 by an even larger margin. If they can do this, one would have to wonder why they did the MAX. So I believe they can not do it.