morrisond wrote:planecane wrote:morrisond wrote:
They figured out how to build an A-12/SR-71 back in the 1960's with Slide Rulers and a very small team - so hundred's/thousand's with very advanced computers can't figure out how to build a wider than taller fuselage using mush more advanced materials and something they may have been working on for at least 12-13 years? You would have to guess they would have built one or two prototype cross sections in that time.
The old engineering adage applies here. "Given enough time and enough money, anything is possible."
I don't think the issue is that they "can't" figure out how to build it. The issue is that they can't or haven't figured out how to build it cheaply enough. If they really wanted to, I'm sure they could make a one off prototype in a few months.
I think it was pretty clear that before MAX grounding - the Launch was pretty imminent and we would have been looking at full industrial launch by now after Authority to offer sometime last spring. I believe they had figured it out.
I think that back in 2011 (or thereabouts) they had figured out the engineering to build the Ovalish cross section for the NSA as well (but it might have been more of a true oval) they just hadn't figured out how to build it cheaply enough hence we got the MAX.
I think what they had done in the intervening 9 years was to evolve the shape to Ostrower's Child's making it simpler and figured out the production system.
I still suspect we will still see the same NMA shape that would have been offered last year (maybe a touch longer to take into account A322)- albeit with a more advanced control system which they are doing the work on right now to make sure the frame can accommodate it and figure out what they have to charge for it.
I don't think it was that clear. Rumors said Boeing was about to launch the NMA last year, but there's no strong indication about it.
One question though: if the NMA was about to be launched a year ago (and I fully understand why it would not have been, given the MAX grounding), why does Boeing have to go back to the drawing board a year later? If the NMA proposal was solid a year ago, it would be as solid today.
Unless, as many (including me) speculate, the proposal and business case were already iffy-iffy and the announcement of the A321XLR killed it; in which case, the delay might have been a blessing in disguise.