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Nicoeddf wrote:leleko747 wrote:Nicoeddf wrote:The 787 is still a long haul optimised plane with structural weight for 15h flying, not 3-7.
Well, so was the 747, but Boeing could modify it for domestic flights (B747-100SR and 400D versions).
And what a widespread use and success it was!
FLALEFTY wrote:Also, the talk about reviving the 764 and reengining it probably went something like this: FedEx & UPS: "Hey Boeing! What do you have to replace the MD-11F and A306?" Boeing: "Er...How about buying (more) 777F's?" FedEx & UPS: "Nah! Too big & expensive. What else ya' got?" Boeing: "How about more 767F's?" FedEx & UPS: "Nope! We got enough of those." Boeing: "Well, what about a 764F with some new GE engines?" FedEx & UPS: "We'll get back to you. (Hey UPS, do you still have Airbuses' number handy?)"
seahawk wrote:Or you put that engine on a 767 and take all low hanging fruit to improve it in the process.
RJMAZ wrote:I swear I have repeated the 787-3 history a dozen times and the same members keep posting incorrect facts.
The 787-3 did have a third of the launch orders. It would have had better trip cost up to around 2000nm. Engine maintenance was also significantly less due to the derated engines. The perfect solution to the MOM gap we have today.
A brief history lesson. 4 years after launch the 787 was well behind schedule. The 787-3 was originally planned to be built before the 787-9. Boeing was forced with two options. Delay the 787-9 3 years or develop it before the 787-3. At that point the 787-9 had 3 times the orders of the 787-3. So they decided to built the 787-9 next.
ANA was pissed as they would not get their 787-3's for many years. The model was actually a very big develop with a totally unique landing gear, centre wingbox, lightened inner wing and a brand new outer wing to keep in code D gates. This model was to be over 10,000kg lighter.
Boeing then offered them a fast solution of a standard 787-8 with just the outer wing tips chopped off. No weight reduction at all of any of the structure. The wing tips saved around 3,000kg. This was deemed unacceptable. This revised 787-3 is what members here incorrectly think is what the aircraft always was. This revised 787-3 would have burnt more fuel every trip but the it would have had lower airport fees due to the code D gates. This meant it had lower trip costs on flights below 200nm. ANA then decided it may as well just buy normal 787-8's and just fly them well below MTOW.
Any 787-3 built today would be the same as the original proposal with many unique lightweight parts. It would probably have an OEW of around 105t as they would know exactly where to remove weight.
Ideally Boeing would actually give the 787-3 a unique version of the genX not a simple derate. The A350-1000 XWB-97 for instance got a larger core than the A350-900 XWB-84 which increased thrust and decreased bypass ratio. GE would do something similar but the other way. Maybe use the smaller 2B core with the 1B fan. Pushing bypass ratio up to say 11:1 in the same nacelle so it would save on certification. This would give the 55,000-60,000lb of thrust required with slightly better SFC.
Such an 787-3 would easily sell in the hundreds. It might have around 4000nm range. If I was Boeing to get the most out of the investment in weight reduction and new engines I would then make a version 6m shorter which would then have 5000nm range. This would be a good 767 replacement.
RJMAZ wrote:seahawk wrote:Or you put that engine on a 767 and take all low hanging fruit to improve it in the process.
It would never beat the 787-3 for passenger use.
You'll end up with two aircraft with nearly the same OEW of 105t. The 787-3 would have 5% more cabin area but would fit 10+% more passengers when using acceptable seats (7ab vs 9ab). Both would have code D wings, similar span. Both would burn the same fuel on a trip but the 787-3 with 10% more passengers would then have better fuel burn per passenger.
The 787-3 might cost more to develop but will it cost more to build? Adding a couple hundred more 787 orders could allow it to go up to rate 16 further reducing unit cost on all models. Pilot ratings and maintenance would be simplified with the 787-3. The 787 would now cover the full spectrum.
Obviously the 767 option is best for the freighter, but really the current 767F could soldier on with just a PIP jointly funded. Aftermarket blended winglets are already available if freighter companies really wanted better fuel burn.
Eyad89 wrote:RJMAZ wrote:This meant it had lower trip costs on flights below 200nm. ANA then decided it may as well just buy normal 787-8's and just fly them well below MTOW. .
Alright, I don’t what to say but to quote Boeing’s VP who said in 2010 that 787-3 simply failed because 788 was simply more efficient on any mission that is longer than 200 nm.
RJMAZ wrote:Eyad89 wrote:RJMAZ wrote:This meant it had lower trip costs on flights below 200nm. ANA then decided it may as well just buy normal 787-8's and just fly them well below MTOW. .
Alright, I don’t what to say but to quote Boeing’s VP who said in 2010 that 787-3 simply failed because 788 was simply more efficient on any mission that is longer than 200 nm.
You just found a source that confirms exactly what I wrote. The revised 787-3 was only more efficient up to 200nm.
Please do a search. Many people over the years have answered 787-3 questions in detail on this very forum. Some members even work at Boeing had inside knowledge.
The 787-3 would never have been launched if it was only going to be efficient on routes below 200nm. It is not like Boeing suddenly worked this out 5 years after launch. The delays and lack of weight reduction due to those delays caused it to be cancelled.
It is very simple. If you put a smaller wing you must reduce empty weight to maintain lift to drag. Fuel burn improves and airport fees reduce.
However if you reduce wing size but maintain nearly all of the weight the lift to drag and fuel burn becomes worse. As the MTOW is fixed any OEW gain reduces available fuel and range drops significantly.
Nicoeddf wrote:And the "Cargo" reflex is maybe the most overrated thing on a.net besides Airbus giving planes for free and should Boeing re-start the 757 line.
mjoelnir wrote:Your "unrevised" 787-3 did never exist. Perhaps somebody in Boeing had the idea it would be possible, but when it came to designing the 787-3 it became the frame that was beaten by the 787-8 on any distance.
RJMAZ wrote:You just found a source that confirms exactly what I wrote. The revised 787-3 was only more efficient up to 200nm.
RJMAZ wrote:However if you reduce wing size but maintain nearly all of the weight the lift to drag and fuel burn becomes worse. As the MTOW is fixed any OEW gain reduces available fuel and range drops significantly.
Alright, I don’t what to say but to quote Boeing’s VP who said in 2010 that 787-3 simply failed because 788 was simply more efficient on any mission that is longer than 200 nm.
Source:
https://www.flightglobal.com/news/artic ... -3-337996/
Stitch wrote:Yes, Boeing planned to lighten the frame overall by using less CFRP winding in the fuselage and the shorter wingspan would have saved weight, but they still shared a lot of underlying structure so Boeing could only lighten so much. The A350-800 ran into the same issue as the A350-900 evolved (and was made worse when Airbus decided to abandon the additional weight-reduction plans and just cut out frames).
RJMAZ wrote:Stitch wrote:Yes, Boeing planned to lighten the frame overall by using less CFRP winding in the fuselage and the shorter wingspan would have saved weight, but they still shared a lot of underlying structure so Boeing could only lighten so much. The A350-800 ran into the same issue as the A350-900 evolved (and was made worse when Airbus decided to abandon the additional weight-reduction plans and just cut out frames).
The original 787-3 would have had much more weight reduction. People here still deny that. The more weight that is removed from the 787-3 the further up the crossover point would be with the 787-8. It was only at 200nm in the end because there was no longer any weight removed other than clipped wing tips.
"ANA's primary business reason for adjusting their 787 model selection is focused around aircraft availability to support their fleet plan - the 787-8 is available sooner for delivery than the 787-3 would be," says Boeing."
"Boeing initially planned to have the 787-3 follow the 787-8 into service during 2010, but after more than two years of delays and shifting resources to focus on the stretched 787-9, the -3 variant was not given a specified service entry date."
https://www.flightglobal.com/news/artic ... -3-336950/
As you can see the performance was not the reason but other members here will still keep pushing that the 787-3 can not work as originally marketed.
These members should get it right and say a "A 787-3 with no weight reduction and just shortened wing tips could never work, but a 787-3 with 10+% of the empty weight removed with optimised lightened gear, fuselage and wingbox would offer better trip costs on most domestic flights."
Nicoeddf wrote:What has changed that makes you think a new 787-3 iteration will be the better solution?
The 787 is still a long haul optimised plane with structural weight for 15h flying, not 3-7.
Antaras wrote:Boeing can install better technologies on 783 as comparisons to the rumored 767X, including tinted windows, composite fuselage.
What do you think?
AC02 wrote:Just curious, if Boeing really wants to make a 767XF variant, why not do the same upgrade on the 767-200 at the same time to make it an NMA candidate? Since -200 is sort of still in production (KC-46)
RJMAZ wrote:That's exactly how it works, you'll recall that the 787 weights (both empty and MTOW both increased significantly during development, why should we believe that the predictions of how the 783 would have performed/weighed would be any more accurate than for the 789?mjoelnir wrote:Your "unrevised" 787-3 did never exist. Perhaps somebody in Boeing had the idea it would be possible, but when it came to designing the 787-3 it became the frame that was beaten by the 787-8 on any distance.
That is totally wrong. You honestly think the sales people launched the 787-3 without the engineers going over the empty weight and lift to drag ratios?![]()
RJMAZ wrote:Not really, you just need bigger engines for takeoff (acc. and Drag). If you want to change wings then the trouble you'll have is the fuselage join section. make the wing any planform/shape you want but really you want all the bits to line up at the fuselage (wingbox-centerbox-fuselage). If, when you re-wing you want to 'upwing' then you can make a longer, sexier, higher AR wing and maintain the Root of the wing as it was (think 788->789(original)) or to 'upwing' you can do a trailing edge extension (a la A350-1000) and keep the remaining structural parts in the right places. When it comes to 'downwing' you'd find that the scenarios to keep an optimised planform don't really allow you to have an optimised wing join structure without coming at it from scratch and that costs whether you do it now or do it in 2005.
Hell even flipdewafs spreadsheet would say that a certain amount of empty weight has to be removed to make the smaller wing work.
RJMAZ wrote:Budget and time restraints simply did not allow Boeing to remove the weight and achieve the original performance target. The target was and still is achievable.
RJMAZ wrote:The original 787-3 would have had much more weight reduction. People here still deny that. The more weight that is removed from the 787-3 the further up the crossover point would be with the 787-8. It was only at 200nm in the end because there was no longer any weight removed other than clipped wing tips.
JayinKitsap wrote:I recall the big change from the -3 having its own wing to it being a cropped -8 wing. I think this came to pass a couple of months after the 7-Late-7 rollout where it was just a hollow shell. It would have had excellent performance on < 1,500 nm routes, with the cropped wing it dropped to the <200 and became not worth it.
RJMAZ wrote:I swear I have repeated the 787-3 history a dozen times and the same members keep posting incorrect facts.
The 787-3 did have a third of the launch orders. It would have had better trip cost up to around 2000nm. Engine maintenance was also significantly less due to the derated engines. The perfect solution to the MOM gap we have today.
A brief history lesson. 4 years after launch the 787 was well behind schedule. The 787-3 was originally planned to be built before the 787-9. Boeing was forced with two options. Delay the 787-9 3 years or develop it before the 787-3. At that point the 787-9 had 3 times the orders of the 787-3. So they decided to built the 787-9 next.
ANA was pissed as they would not get their 787-3's for many years. The model was actually a very big develop with a totally unique landing gear, centre wingbox, lightened inner wing and a brand new outer wing to keep in code D gates. This model was to be over 10,000kg lighter.
Boeing then offered them a fast solution of a standard 787-8 with just the outer wing tips chopped off. No weight reduction at all of any of the structure. The wing tips saved around 3,000kg. This was deemed unacceptable. This revised 787-3 is what members here incorrectly think is what the aircraft always was. This revised 787-3 would have burnt more fuel every trip but the it would have had lower airport fees due to the code D gates. This meant it had lower trip costs on flights below 200nm. ANA then decided it may as well just buy normal 787-8's and just fly them well below MTOW.
Any 787-3 built today would be the same as the original proposal with many unique lightweight parts. It would probably have an OEW of around 105t as they would know exactly where to remove weight.
Ideally Boeing would actually give the 787-3 a unique version of the genX not a simple derate. The A350-1000 XWB-97 for instance got a larger core than the A350-900 XWB-84 which increased thrust and decreased bypass ratio. GE would do something similar but the other way. Maybe use the smaller 2B core with the 1B fan. Pushing bypass ratio up to say 11:1 in the same nacelle so it would save on certification. This would give the 55,000-60,000lb of thrust required with slightly better SFC.
Such an 787-3 would easily sell in the hundreds. It might have around 4000nm range. If I was Boeing to get the most out of the investment in weight reduction and new engines I would then make a version 6m shorter which would then have 5000nm range. This would be a good 767 replacement.
strfyr51 wrote:Nicoeddf wrote:What has changed that makes you think a new 787-3 iteration will be the better solution?
The 787 is still a long haul optimised plane with structural weight for 15h flying, not 3-7.
the 787-3 was designed for medium haul and High density Trunk and international theatre routes. Inter-Europe and inter Asia routes. it's not any larger than the 767-400 but it's designed all digital in operation and will787-3 be optimized for the latest engine and systems technologies The 767-400 was designed with technology very close to the 777. so it could still use some updating and would benefit from the latest 777 and 787 updates, The original 787-3 wasn't designed with intercontinental range But the systems were there for commonality with the -8,9, and now the -. I can't see how it would miss.
Spiderguy252 wrote:FLALEFTY wrote:Also, the talk about reviving the 764 and reengining it probably went something like this: FedEx & UPS: "Hey Boeing! What do you have to replace the MD-11F and A306?" Boeing: "Er...How about buying (more) 777F's?" FedEx & UPS: "Nah! Too big & expensive. What else ya' got?" Boeing: "How about more 767F's?" FedEx & UPS: "Nope! We got enough of those." Boeing: "Well, what about a 764F with some new GE engines?" FedEx & UPS: "We'll get back to you. (Hey UPS, do you still have Airbuses' number handy?)"
Story of Boeing's life of late.
FLALEFTY wrote:Also, the talk about reviving the 764 and reengining it probably went something like this: FedEx & UPS: "Hey Boeing! What do you have to replace the MD-11F and A306?" Boeing: "Er...How about buying (more) 777F's?" FedEx & UPS: "Nah! Too big & expensive. What else ya' got?" Boeing: "How about more 767F's?" FedEx & UPS: "Nope! We got enough of those." Boeing: "Well, what about a 764F with some new GE engines?" FedEx & UPS: "We'll get back to you. (Hey UPS, do you still have Airbuses' number handy?)"
Spiderguy252 wrote:Story of Boeing's life of late.
In 2011, FedEx approached Boeing about creating a freighter version of the 767-400ER as an MD-10F family replacement. Such a frame would also have served to bridge 767 production until the KC-46A entered production (at the time, unfilled 767 production was split 50/50 between passenger and freighter models). FedEx was also pushing Boeing on a 777-200 passenger to freighter conversion program as another possible MD-10F replacement.
At the end of the year, FedEx instead decided to order another 27 767-300F, which is not surprising since while the MD-10 can lift about 50% more payload weight, when it comes to usable volume, the 767-300F is actually fairly close. And FedEx was moving to a common ULD/pallet designed around the 757 and 767 so the extra volume of the MD-10 would be superfluous using the smaller ULDs and pallets. FedEx would subsequently order another 46 767-300F in mid-2015
Revelation wrote:https://www.airliners.net/forum/viewtopic.php?f=3&t=1432797 has a statement from a Boeing exec confirming the 767 study is not aimed at replacing NMA, so the premise of this thread is false.
RJMAZ wrote:Absolute fake news..
The 767-400ER can't easily be turned into a freighter. ..
Turning it into a passenger version is equally stupid.
..
People suggesting they will widen inside the cabin like the 777X to fit 8ab seating is really crazy.
[/quote]Aftermarket blended winglets have been available for 10 years and many passenger airlines have fitted them to their 767-300ER's. No freighter company has bothered as clearly fuel burn is clearly not a problem on the short hops. So if they aren't willing to spend a couple million on winglets they sure as hell aren't going to spend $10+ million on a GenX model just for a fuel saving.
Nicoeddf wrote:strfyr51 wrote:Nicoeddf wrote:What has changed that makes you think a new 787-3 iteration will be the better solution?
The 787 is still a long haul optimised plane with structural weight for 15h flying, not 3-7.
the 787-3 was designed for medium haul and High density Trunk and international theatre routes. Inter-Europe and inter Asia routes. it's not any larger than the 767-400 but it's designed all digital in operation and will787-3 be optimized for the latest engine and systems technologies The 767-400 was designed with technology very close to the 777. so it could still use some updating and would benefit from the latest 777 and 787 updates, The original 787-3 wasn't designed with intercontinental range But the systems were there for commonality with the -8,9, and now the -. I can't see how it would miss.
You can't see how it would miss? After seeing it miss spectacularly?
Dave05 wrote:I feel the 767 series is only suited to United States airlines... I am sure 90% of the 767 series sales are in the US.
strfyr51 wrote:They could update the 767-400 with all the neat stuff they designed and built for the 787 and the 777-8/-9 and build in the updates and FBW to remove all the cables for a truly digital flight control system as they have the technology.
Stitch wrote:Dave05 wrote:I feel the 767 series is only suited to United States airlines... I am sure 90% of the 767 series sales are in the US.
Deliveries per Region:
North America - 52%
Asia - 20%
Europe - 15%strfyr51 wrote:They could update the 767-400 with all the neat stuff they designed and built for the 787 and the 777-8/-9 and build in the updates and FBW to remove all the cables for a truly digital flight control system as they have the technology.
That would result in a very expensive airplane to design, certify and then train customers on. Granted, it would be significantly less expensive that designing, certifying and training customers on an all-new airframe, but having an all-new airframe does give one the freedom to tailor it directly to customer needs and desires which should improve customer interest and reception.
NameOmitted wrote:If much of the problem facing the 787-3 was the truncated wing, is a 777x style folding wing enough to revive the concept, or does it still inherit too much weight from the rest of the family?
AC02 wrote:Just curious, if Boeing really wants to make a 767XF variant, why not do the same upgrade on the 767-200 at the same time to make it an NMA candidate? Since -200 is sort of still in production (KC-46), and the 2-3-2 config is great for long haul flight from a passenger's perspective. 200ER already has a fairly good range when compared to 321XLR. Meanwhile, this won't kill the 788 (762 is smaller) or MAX 10 (762 has a better range) as well. I think this is a lot easier than restarting the 757 or start a whole new 797 program.
The only problem I can think of is the size. 762 is a lot bigger than 321.
889091 wrote:One can't help but wonder how much the 737-MAX debacle has affected Boeing's R&D budget.....