The "What is" debate on the 777-ERX is an interesting one.Primarily due to how close Boeing is keeping its cards to its chest. Why 'cos they don't exactly know what the 350-1000 is! It is of course "paper" and can therefore be manipulated far easier than a metal plane!
However there fave been some leaks and indeed by watching Airbus activity can give us a clue. So what might it be?
have stated that there will be GeneX learnings.I would suggest a slightly hotter, higher pressure core and better,cleaner burn at the back. Say 2-3% improvement? What they will not do is a new counterrotating core or new fan -too expensive.
Wings. As with the 748 replace existing wing extensions with the new blended design from the 787.Good for marketing purposes and probably worth an extra 1%
Nose.Replace the 767 nose (for that is whar it is)Graft the Carbon 787 nose on with a new carbon joining frame. Obvious weight saving and a state of the art cockpit and far greater comonality for those who have bought 7876's (everybody!) (Note Quantas and BA
Fuselage. Ribflattening to gain a couple of Ins either side. This technique saw the ligh of day with the NG330 Mk2.To make it 9 across. The 777 is far closer to 10 across at present. Add the extra width and there you have 10 abreast at 747 seat (Y class) comfort levels.
Are they suggesting this -you bet they are! Who noted a very strange 10 across mock up recently of the A350. It actually did more to proove it could'nt be done than could -so why do it?
'Cos Boeing just did!
Last 3. They could go AlLi on the fuselage -after all it was origonally designed for AlLi (Micro fracturing issues stopped it at the development stage. View -Only if they have to.
Carbon spars/Box section.Very expensive.
Small stretch.Possible -Boeingstated a 400 was possible 10 years ago. ut unlikley IMHO. Would impinge on range too much and certainly kill the 748i.
Result. A plane with a capacity of 25 seats greater than the 1000 and generally more space. More range than the 1000 and high comonality with the 787.
Oh and a great looking plane to boot!
Could all those changes make up for the fuel cosumption differental of a 95,000 lbs thrust engine Vs a 115lbs engine. Dunno but it would have to!
. Incorporate these changes to the 777-200LRX (mainly Biz class) and you will have your Lon-Syd non stop both ways right there IMHO.Again -The reason for Quantas/BA interest??