tortugamon
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Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 7:17 am

Boeing Reveals ‘Challenging’ 757 Replacement Requirements

"Boeing says airline requirements for a potential 757 replacement or middle-of-the-market (MOM) sector aircraft are coalescing on performance targets that will not only be tough to reach but also challenging to meet in a modular design that could also be scaled down to replace the 737."

"“We’ve probably seen over 30 customers and talked to them about really what they are looking for in an airplane bigger than the 737 MAX family,” Boeing Commercial Airplanes Senior Vice President John Wojick says. “What we have heard back pretty consistently is interest in an aircraft that is slightly larger and can fly slightly further. So they want an airplane about 20% larger than a 757, and something with 25% greater range than a 757.”
.....
“The airlines want operating economics like the (737) MAX, so basically single aisle economics. At this point in time none of the manufactures have a product in that size category, that kind of capability and certainly not those kinds of economics. That’s quite a challenge"
......................................................

http://aviationweek.com/commercial-a...nging-757-replacement-requirements

Boeing is being very transparent here on what the customer desire is. By talking to ~30 customers I think it looks like Boeing is serious about this.

~5,000nm and ~240 two-class seats which sounds basically like a 753 with 1,500nm more range.

No indication of twin aisle or single but they do say they need 'single aisle economics'.

The obvious big problem though is that they don't think they can satisfy the demand and still have a frame for the NSA future.

I can't help but think we have another 757/767 twin project again with the MOM and the NSA if they go forward.

tortugamon
 
columba
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 7:31 am

Any idea who the 30 potential customers are ? In Germany I could see this plane be interesting for Condor/Thomas Cook to replace the 757-300 and 767s.
It will forever be a McDonnell Douglas MD 80 , Boeing MD 80 sounds so wrong
 
AWACSooner
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 7:38 am

About bleeping time!!! They should've been on this five years ago before airlines like DL and AA began replacing their 75's with 321's!
 
dare100em
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 7:42 am

Quoting tortugamon (Thread starter):
No indication of twin aisle or single but they do say they need 'single aisle economics'.

The obvious big problem though is that they don't think they can satisfy the demand and still have a frame for the NSA future.

I can't help but think we have another 757/767 twin project again with the MOM and the NSA if they go forward.

tortugamon

I think since quite some time it is technically impossible to build a fuselage which can replace the 737max on one end and cover the market up to the 787-8 (but with less range) on the other end.

I fully agrea with you that they need to build two fuselages with as much commonality as possible. The MOM may be a oval small twin-aisle - but that's technically challanging no question. But that would help them to kill the A330neo from below and don't harm the 737-8max in the short run. It has great potential e.g. for intra-asia people moving with unchallengend economics but it's not easy.
 
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seahawk
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 7:48 am

I do not know if the bottom line is not that this is not worth the effort at the moment. There is not much commonality to be had between the twin and the single aisle solution.

Wing - no
fuselage - no
engine - no
landing gear - no

What is left?
 
dare100em
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 7:53 am

Quoting seahawk (Reply 4):
I do not know if the bottom line is not that this is not worth the effort at the moment. There is not much commonality to be had between the twin and the single aisle solution.

Wing - no
fuselage - no
engine - no
landing gear - no

What is left?

Cockpit / many of the internat systems (like 757 and 767 did).

But you're right in a way, that's what Boeing says. No way to cover this wide rang with a single solution. Even if you go for a single-aisle and try to build a 5000 nm 240 pax plan you very probably won't be able to build a good and light 737 replacement on that base...

However i thin Boeing has to do something in that marked and they are very serious about that. It would be dangerous to let Airbus cover it complettly.
 
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 7:54 am

Quoting AWACSooner (Reply 2):

I would bet Delta is one of these airlines.
They don't see a current complete replacement for the 757 on the market.

Quoting seahawk (Reply 4):

I imagine if they go down that road it would be a lot like the 757/767.
Which have a good bit in common. (but it generally boils down to the smaller pieces than the big ticket items.)
 
tortugamon
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 8:03 am

Quoting seahawk (Reply 4):
There is not much commonality to be had between the twin and the single aisle solution.

I personally have not read anything to make me think it will be a twin aisle project yet. I would think an optimized 753 with a true 2L entry door could solve loading/unloading times and still be ok. My take away is that Boeing is trying but are unsure of the direction yet.

tortugamon
 
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seahawk
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 9:04 am

Quoting dare100em (Reply 5):
However i thin Boeing has to do something in that marked and they are very serious about that. It would be dangerous to let Airbus cover it complettly.

But Airbus is unable to cover it as well. The A330 is bigger the A321LR is smaller and lacks the range the 30 airlines wanted. The big question is if there is enough of a market left between 787/A330NEO A320/MAX/NSA for a new design to sell enough units to be worth the effort. Imho the answer is no. Even if you can make the MOM comparable to the MAX in operating costs, the NSA would be better. And if the NSA covers the size of the MAX and if the replacement for the 900 is a bit less limited, it would be preferably to the MOM for most applications.

And if you somehow merge MOM and NSA in to one product, you end up with something that might be vulnerable from above and below.
 
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 9:27 am

Quoting seahawk (Reply 8):
And if you somehow merge MOM and NSA in to one product, you end up with something that might be vulnerable from above and below.

Anything is "vulnerable from above and below" exept the A380 lol. IMO there is definetely a huge market for a medium-sized, medium range plane between an A321 all up to the A330/ 787-8 territory.

About 150t max. MTOW and a range up to 5000 nm will make the life of the A330neo (and the 787-8 but that's gone anyway) very hard. There is a lot of room for such a plane - especially if it covers intra-Asia medium-haul operations once done by the A330-200. Neiterh the 787 nor the A330neo are really optimized for stages below 4000 nm. Both come abou 200t and are capable of long-distances. With the A330 growing over it's lifespan and the 787 developing in a really long-distance plane there is not only the 757-market but all what once was served with the 767 and the A330-200. That is exactly the reason the airlines calling for such a plan with abou 240 pax and 5000 nm - there is no longer a option.
 
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 9:42 am

I think it's very telling that they talked to over 30 customers about a MOM, and they still came away with the idea that it should somehow be modular to the NSA...That even receiving fairly consistent interest of what the MOM should be if built, there just wouldn't be enough demand for the MOM to stand on its own.

Assuming they envision (like most of us) how much an on-time-and-spec NSA (only) aircraft would print money for the company, the "real" challenge seems to be how much profitability they can afford to lose from a hypothetical NSA-only program in combining the two as one modular, scalable design.

They really don't want to let go of that (ever-tinier) slice the middle market occupies, and they seem to be willing to risk the NSA to keep it.
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Tristarsteve
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 9:48 am

And where is the 40000 lb thrust engine coming from?
The B757 had a scaled down RB211, but if they scaled down the Trent it would have too high fuel consumption. Would the CFM56 scale up again?
 
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KarelXWB
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 9:50 am

Quoting tortugamon (Thread starter):
The obvious big problem though is that they don't think they can satisfy the demand and still have a frame for the NSA future.

   Market demand for an 5,000nm single aisle airplane is believed to be less than 1,000 units. Not really worth an investment of $10 - 15 billion.
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parapente
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 9:59 am

All true - that's is -if you believe them.So Boeing just 'decided' to 'give' all their confidential research away did they? Mmmmm. Highly predictable 'results'...
Now what if the real research suggested that the sweet spot was the 757-200 (hell it used to be the sweet spot - what changed so suddenly)? They certainly would not and could not publish those facts if the results were such, now could they. (ie hand the whole market to the A321 NEO LR).
What Boeing needs is time and lots of it.So be prepared for lots of 'please wait there's something better coming - promise".airlines wanted something 'now' (as Airbus was offering) so they had to go for the MAX.But it was management by sellotape.They knew back then a bigger aircraft was required - now airbus are offering an aircraft that can go transatlantic 210 pax or seat 246 pax trancon' (18" seat btw).
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 10:06 am

Quoting KarelXWB (Reply 12):
Market demand for an 5,000nm single aisle airplane is believed to be less than 1,000 units. Not really worth an investment of $10 - 15 billion.

I can foresee all the Chinese airlines combined eventually having a 1000 frame market alone for an aircraft in this category.
I hope Boeing is able to look at a scaled-down narrower-bodied version of the 787, but as TristarSteve says, there currently no suitable engine for it anyway.
 
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 10:09 am

Quoting TC957 (Reply 14):
I hope Boeing is able to look at a scaled-down narrower-bodied version of the 787

I believe a scaled-down 787 would still be too heavy.
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seahawk
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 10:40 am

What would a narrow body have in common with the 787?
 
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zeke
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 10:43 am

Quoting Tristarsteve (Reply 11):

Sounds like a perfect job for a GTF.
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 10:47 am

Quoting tortugamon (Thread starter):
So they want an airplane about 20% larger than a 757, and something with 25% greater range than a 757.”

Seems like it'll be as long as the DC-8-70's operated by UA except this time no leg room, single aisle with that many seats will take more time to board, plus the line ups for the lavs in the back with that many people and 1 aisle, may be an interesting adjustment for flight crews who already battle for the minimal amount of aisle room on single aisle planes on longer flights like toHawaii.

Quoting AWACSooner (Reply 2):
About bleeping time!!! They should've been on this five years ago before airlines like DL and AA began replacing their 75's with 321's!

100% agree, it seems Boeing has thought that the replacement 757, would not be as viable 5 years ago & now it might be.

Quoting KarelXWB (Reply 12):
Market demand for an 5,000nm single aisle airplane is believed to be less than 1,000 units. Not really worth an investment of $10 - 15 billion.

I've not ever seen this before, do you have a source article to read? Is that measure by todays standards, or with future projections that are augmented over time to show the increased demand for air traffic well into the following decades?

Quoting TC957 (Reply 14):
I can foresee all the Chinese airlines combined eventually having a 1000 frame market alone for an aircraft in this category.

Yet the 757 didn't do real well in Asia at all, must be the markets as they have grown over the past few decades.
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FlyBigDeltaJets
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 11:18 am

Quoting zeke (Reply 17):
Sounds like a perfect job for a GTF

Beat me to the punch. Currently topping out at 35k (PW1135G), the GTF has (theoretically) very scalable technology and a 40k-45k thrust engine shouldn't be that difficult to achieve.
 
deltal1011man
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 11:39 am

Quoting zeke (Reply 17):
Sounds like a perfect job for a GTF.

exactly. IMO the GTF could be scaled up to 45K pretty easy.

Quoting Tristarsteve (Reply 11):
Would the CFM56 scale up again?

Not sure if CFM can milk 10K(ish) more pounds of thrust out of the LEAP or not.

Also would be interesting if Rollers would want in or leave the market to PW and CFM/GE. (I imagine they will stay out of it)
 
mjoelnir
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 11:53 am

Strange, here is discussed a "757 replacement". Is it not an A.net law that the 757 is replaced and that no airline needs an frame in the size between the 737-9max / A321neo and the 787-8?

And now Boeing has been talking with 30 airlines and suddenly this non existing market does exist?

I could imagine one airline, FI, would like a frame described above, I do not know who the other 29 are

Quoting tortugamon (Thread starter):
~5,000nm and ~240 two-class seats which sounds basically like a 753 with 1,500nm more range.

  
 
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 11:56 am

Quoting tortugamon (Thread starter):

~5,000nm and ~240 two-class seats which sounds basically like a 753 with 1,500nm more range.

That's pretty close to what I predicted would be necessary for a 757 successor. Though, I had eventually figured that I was being a bit over idealistic, yet spurred onward by faith in Boeing's engineering feats

Quote:

Of course, I think that if they were to make a true successor, it would probably need to be a narrowbody somehow capable of 5300 real-world miles with headwinds accounted for and still handle a good amount of cargo. That would create a new niche of 3800-5500 Mile thin longhauls to finish off the 763's and to some degree cannibalize Non-ER 777 and A333 routes, which is a heck of a lot more possibilities than just TATL. But I'm not going to hold my breath for that, I don't think that's technically feasible.

Basically, the application is a 757 (42K), 767 (ER and Non), 777 (Non ER), and A333 high frequency downguage for airlines that currently fly those types, and a step above the 737 MAX for operators who want to do long haul but lack the craft for it, and maybe don't want to take as drastic a measure as DY when they adopted the 787.

Of course as others said, the big challenge would be making it appealing to the wider numbers of existing 737 operators rather than only the much more limited 787 operators. I think it would be absolutely necessary to appeal to as many as possible, but whether or not a good enough amount of commonality with the 737 MAX can be made is the question. (I think there is no question that ground clearance would be absolutely different)

Quoting Tristarsteve:
And where is the 40000 lb thrust engine coming from?

I was thinking 45K would do the trick... As for what would do that job based on new tech, good question. Going along with the need for being close to the 737-sorts,
I do wonder if a LEAP-1D variant could be made, significantly increasing the size and power from the smaller versions... Though that's adding about 15-20000 more Ib's.

Quoting RWA380 (Reply 18):

Yet the 757 didn't do real well in Asia at all, must be the markets as they have grown over the past few decades.

I couldn't really see much markets in Asia that the 757 would do with its ~3700 mile real world range that couldn't be done with a 737 NG, or with low enough demand to not warrant a Widebody anyways.
 
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 12:00 pm

Quoting tortugamon (Reply 7):
I personally have not read anything to make me think it will be a twin aisle project yet. I would think an optimized 753 with a true 2L entry door could solve loading/unloading times and still be ok. My take away is that Boeing is trying but are unsure of the direction yet.

tortugamon

Icelandair uses always the L2 door on both the 757-200 and 757-300 if it is possible (depends on air bridge design). It is a tru full sized door as it is.
 
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 12:07 pm

Quoting FlyBigDeltaJets (Reply 19):
Yet the 757 didn't do real well in Asia at all, must be the markets as they have grown over the past few decades.

Several Chinese airlines operated B757's, Air China, China Southern, Shanghai, etc
 
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Btblue
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 12:32 pm

Anybody else think a 757-3MAX could do the job of the 788 were it be available and of course, depending on the route served. Pretty much like what the 737-9 can apparently do against the 757-200.
 
ikramerica
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 12:34 pm

This is not a 757 replacemt. It's a 767 replacement. Nothing about that spec is 757.
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deltal1011man
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 12:44 pm

Quoting fcogafa (Reply 24):

Several Chinese airlines operated B757's, Air China, China Southern, Shanghai, etc

RWA380 said that. Anet doing anet things again

and while yes they did you are still talking about, IIRC, less than 75 total frames ending up in China. Of course the market has changed and the 321 has done fairly well in China. Still not nearly the market say Europe or the US is for 739/321/757 sized aircraft.
 
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 12:44 pm

Quoting S75752 (Reply 22):
I do wonder if a LEAP-1D variant could be made

Technically it would have to be a LEAP-2B, since the letter in CFM's new engines denotes the airframer (i.e. LEAP-1A for Airbus, -1B for Boeing, -1C for COMAC. The GEnx has the -1B and -2B for 787 and 747-8, respectively)
 
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 12:50 pm

This is not a 757 replacement. It's a 767 replacement. Nothing about that spec is 757.

100% agree.And (as above) that market alone (with 788 and 332 above) does not warrant 10-15 Bn investment.But that's always assuming that the research actually did say that!
If it did then re-engine the 767.(Always loved the unique cross section seating on this aircraft).
 
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 12:51 pm

Quoting seahawk (Reply 16):

About the same things that the 757 had in common with the 767
 
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 1:00 pm

Quoting parapente (Reply 29):

The reason the 757 was shoved onto 767 routes in the first place is that the 762 was too heavy.
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seahawk
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 1:05 pm

Quoting cosyr (Reply 30):
About the same things that the 757 had in common with the 767

Which is, except the type rating and the basic cockpit layout? (which imho is not a topic any more today)
 
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yellowtail
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 1:22 pm

For sure carriers like AA and UA would be in the mix for thier long thin markets out of IAH/MIA to deep south america and smaller European markets for the east coast. AA would like ones on routes like COR and ASU, TXL and MAN. UA on FOR and BSB, LIS and GVA.

CM also must be one of the airlines. The desperately need a slightly larger / longer range aircraft for PTY-MVD/EZE/GRU/SFO etc. I could see carriers like KQ, AV, AM, QR, FI all being interested in it. With the latter very very interested.
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 1:25 pm

Being the 767 now has a long and extended life, what sort of lightening and 'smallening' could it undergo?
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An225
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 1:51 pm

Interesting...
Reading this makes me wonder. If I remember correctly, the 757-300 was not a success due to its SA/long body configuration. Now they are talking about a new design with the same configuration which is 20% longer - but what have changed? Will they be able to solve the pax embarking/disembarking times problem? I would think not, so we are back to a design which might appeal to a very small slice of the market.

Regarding the TA configuration, why not consider reviving the 787-3? The original logic behind this design is a replacement for the 757-300/767-200 models. If yes, they will need to do some optimization of the MTOW and range, but it might be a good place to start. It will sure provide some commonality advantages if incorporated into fleets of current and future Dreamliner operators.

Regarding the challanges of designing a TA+SA on the same time, it is for sure a complicated task, but Boeing was able to do it almost 40 years ago with the combo of 757-200/767-200, so they sure have the experience in doing so.

An225
 
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 1:55 pm

So basically... Boeing acknowledge the market needs for a 757 replacement but doesn't want to build and design a separate frame beside the 737 replacement. But Boeing would rather stretch the 737 replacement to meet the range, payload..... And all the other good stuff of a true 757 successor for example a 797-2000 but it's hard

Did I read that right?

[Edited 2015-06-08 06:57:05]
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 1:58 pm

Why didnt they just tweak the exisiting 757?

A 757 neo kind of thing?

I know it's an 80s plane...update it instead of a clean sheet

Seems to work very well for airbus
 
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 2:01 pm

Quoting jfklganyc (Reply 37):
Why didnt they just tweak the exisiting 757?

A 757 neo kind of thing?

Boeing already said there's no business case for such a plane.
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 2:04 pm

if I'm understanding Boeing correctly, they essentially want a clean-sheet version of a 757-300maxLR ?

It doesn't make much sense to create such a plane in isolation, but perhaps it can form the upper-ceiling of the Y1 family - lowest size 738, mid-size 739/752, large size 753 (but make sure it's done as a double-stretch instead of a shrink)
 
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 2:05 pm

Quoting jfklganyc (Reply 37):
Why didnt they just tweak the exisiting 757?

How would you want to do that? The 757 assembly line is gone and the supply chain does not exist anymore.
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Miami
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 2:06 pm

Quoting jfklganyc (Reply 37):
Why didnt they just tweak the exisiting 757?

You do realize the production line is gone, right? Also the supply chain is gone.
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Miami
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 2:08 pm

We had this thread not too long ago: Boeing Considers 757 Revival (by rotating14 Feb 10 2015 in Civil Aviation)
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 2:08 pm

Quoting jetblue1965 (Reply 39):

From I understand I think... They essentially want the replacement to be a stretched version of the 737 replacement
Barack Obama is not a foreign born, brown skinned, anti-war socialist who gives away healthcare. You're thinking of Jesu
 
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GCT64
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 2:10 pm

I believe a lot of the "Near" TATL routes (US East Coast to UK/Ireland/France etc.) will ultimately move to narrowbodies (potentially more efficient and allows more frequency and a bigger diversity of point-point routes), so I think this proposed aircraft would have plenty of applications in the US (Hawaii, TCON), North Atlantic (Near TATL), Middle East (TK surely would want this across their network) and, probably, in Asia (Chinese airlines seem to be gradually moving from A319/A320 up to A321 purchases).

However, a new aircraft will be a massive investment for Boeing and what is to stop Airbus "MAXing" (as in reaching the ultimate limit of the airframe) the A321NEO into a A322? (same length as B753 (adds 32ft = ~30% more pax?), a new wing, new engines etc.). While not straightforward or simple, this must cost a lot less than a whole new aircraft and Airbus have surely already studied it.
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holzmann
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 2:14 pm

Why can't they take a 787 and just shrink all dimensions by factor X and then re-program that machine that makes the fuselage for the 787 (shown below) at a cabin width of ca. 5.77m and make one of say 3.6m? (Current 757 cabin width according to wiki is 3.54.) Do the same thing with the wing, etc. Install common flight controls and systems as the 787. And of course find your engine (not easy). Make it a single aisle. Job done, right?

I mean if BMW and Audi can be accused of making the same sausage but in three different sizes (3, 5, 7 series / A4, A6, A8, respectively) then why can't Boeing?

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dare100em
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 2:17 pm

Quoting holzmann (Reply 45):
Why can't they take a 787 and just shrink all dimensions by factor X and then re-program that machine that makes the fuselage for the 787 (shown below) at a cabin width of ca. 5.77m and make one of say 3.6m? (Current 757 cabin width according to wiki is 3.54.) Do the same thing with the wing, etc. Install common flight controls and systems as the 787. And of course find your engine (not easy). Make it a single aisle. Job done, right?

I mean if BMW and Audi can be accused of making the same sausage but in three different sizes (3, 5, 7 series / A4, A6, A8, respectively) then why can't Boeing?

You're kidding - don't you. I mean, really  Wow!
 
FlyBigDeltaJets
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 2:22 pm

Quoting dare100em (Reply 46):
You're kidding - don't you. I mean, really  

I'll bite, why isn't that be a legitimate question? It's been done before on the engine side (CFM56-7 scaled down to create CF34-10). Why couldn't a similar practice be done for a new airframe?
 
An225
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 2:24 pm

Quoting dare100em (Reply 46):

Why do you think so? please explain

An225
 
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RE: Boeing Reveals Challenging 757 Replacement Rqmt

Mon Jun 08, 2015 2:31 pm

Quoting tortugamon (Thread starter):
So they want an airplane about 20% larger than a 757, and something with 25% greater range than a 757.”

Tall order. If you're talking clean sheet design, the efficiency would have to come from monster weight savings (read as composite tube) and major fuel burn. And seating north of 220 I'd think.

Quoting Tristarsteve (Reply 11):
And where is the 40000 lb thrust engine coming from?

Can the GenX be mounted underwing on a narrowbody if it were a similar frame and sitting height to an existing 757?

Quoting An225 (Reply 35):
If I remember correctly, the 757-300 was not a success due to its SA/long body configuration.

Nope. It was 'unsuccessful' due to market timing. Timing is everything (ask the 717). Operators have found that boarding times aren't much worse than existing narrowbodies. It's a great a/c. The problem with the 753 right now is that there aren't more of them available!

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