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Trimeresurus
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777x vs 787

Mon Nov 09, 2020 8:26 pm

Does the 777x employ the composite body, very flexible wingtips(not sure what they're called), bleedless system as well as other features such as electronic window dimming and whatnot? Or is it more like a legacy 777(I know MAX has a more similar build to the 737NG than the state of art 787)? I know it's gonna have a common flight deck with the 787 and a common type rating(which is interesting because, if an airline owns both the legacy 777 and 777x, it'd need separate pilots for both, despite for example not owning the 787).

So is it going to be "Just the 777 that you know, but better" or a complete rework?
 
gloom
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Re: 777x vs 787

Mon Nov 09, 2020 8:42 pm

Trimeresurus wrote:
So is it going to be "Just the 777 that you know, but better" or a complete rework?


You can think of it as 777 Neo. Just a bit more than new engines, since it has foldable wingtips in order to improve cruise altitudes, and since it weights a bit more, not raising max takeoff weight, it will have lower max payload.

But, in general terms, more or less old frame, old wings, new engines.

Cheers,
Adam
 
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MoKa777
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Re: 777x vs 787

Mon Nov 09, 2020 11:19 pm

The 777X actually has a completely new wing, not just different wing tips.
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GSOtoIND
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Re: 777x vs 787

Tue Nov 10, 2020 12:22 am

Aside from the fact that the 777 already had FBW, the best analogy is 777:777X::A300:A330.
 
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zeke
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Re: 777x vs 787

Tue Nov 10, 2020 1:36 am

GSOtoIND wrote:
Aside from the fact that the 777 already had FBW, the best analogy is 777:777X::A300:A330.


The production A300s did not have FBW.

The 77X is essentially is an update to an existing frame like going from the 737-400 to 737-800, or A330-300 to A330-900.

From a passenger point of view there are changes inside the cabin which should set it aside from the legacy 777.
“Don't be a show-off. Never be too proud to turn back. There are old pilots and bold pilots, but no old, bold pilots.” E. Hamilton Lee, 1949
 
GSOtoIND
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Re: 777x vs 787

Tue Nov 10, 2020 3:22 am

zeke wrote:
The production A300s did not have FBW.

Hence why I added the caveat.
zeke wrote:
The 77X is essentially is an update to an existing frame like going from the 737-400 to 737-800, or A330-300 to A330-900.

From a passenger point of view there are changes inside the cabin which should set it aside from the legacy 777.

It was silly of me to skip the most obvious analogue (737CL to 737NG) in favor of the A300. The 737 example works best because it keeps the same type rating. The A330neo doesn't fit as well because the old wing was kept, albeit with a retwist and new wingtip devices. The Embraer E1 to E2 update works as well. Also, did Boeing keep the old horizontal stabilizer on the 777X?
 
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Starlionblue
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Re: 777x vs 787

Tue Nov 10, 2020 5:59 am

GSOtoIND wrote:
zeke wrote:
The production A300s did not have FBW.

Hence why I added the caveat.
zeke wrote:
The 77X is essentially is an update to an existing frame like going from the 737-400 to 737-800, or A330-300 to A330-900.

From a passenger point of view there are changes inside the cabin which should set it aside from the legacy 777.

It was silly of me to skip the most obvious analogue (737CL to 737NG) in favor of the A300. The 737 example works best because it keeps the same type rating. The A330neo doesn't fit as well because the old wing was kept, albeit with a retwist and new wingtip devices. The Embraer E1 to E2 update works as well. Also, did Boeing keep the old horizontal stabilizer on the 777X?


The A330/A340 was basically a new aircraft, especially systems-wise, compared to the A300. The 777X is most definitely not a brand new aircraft, new wing notwithstanding.

AFAIK the 777X systems are pretty similar to 777.
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
unimproved
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Re: 777x vs 787

Tue Nov 10, 2020 2:35 pm

Trimeresurus wrote:
Does the 777x employ the composite body, very flexible wingtips(not sure what they're called), bleedless system as well as other features such as electronic window dimming and whatnot? Or is it more like a legacy 777(I know MAX has a more similar build to the 737NG than the state of art 787)? I know it's gonna have a common flight deck with the 787 and a common type rating(which is interesting because, if an airline owns both the legacy 777 and 777x, it'd need separate pilots for both, despite for example not owning the 787).

So is it going to be "Just the 777 that you know, but better" or a complete rework?

They wouldn't need seperate pilots, only a differences training. 777 legacy and 787 also share a type rating.
 
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zeke
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Re: 777x vs 787

Tue Nov 10, 2020 2:43 pm

unimproved wrote:
777 legacy and 787 also share a type rating.


Not in the USA, they are different type ratings.
“Don't be a show-off. Never be too proud to turn back. There are old pilots and bold pilots, but no old, bold pilots.” E. Hamilton Lee, 1949
 
OldAeroGuy
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Re: 777x vs 787

Thu Nov 12, 2020 1:51 pm

GSOtoIND wrote:
Also, did Boeing keep the old horizontal stabilizer on the 777X?


No, the 777X has a larger h.tail to match the its larger wing.
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