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PW100
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Re: Boeing 777X Testing/Production Thread - 2020

Tue Feb 11, 2020 9:16 pm

WoodysAeroimag wrote:
N779XW Boeing 777-9 - C/N 64240 / LN 1567 - Passing over Paine Field on its way back to Boeing Field today.

Image

Just stunning!
Thanks for sharing.
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bikerthai
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Re: Boeing 777X Testing/Production Thread - 2020

Tue Feb 11, 2020 10:30 pm

Is it too soon to consider a royal coup and crown the 777-9 the new Queen of the skies?

Moderator, feel free to move this diversion to a different thread.

bt
Intelligent seeks knowledge. Enlightened seeks wisdom.
 
JohanTally
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Re: Boeing 777X Testing/Production Thread - 2020

Wed Feb 12, 2020 12:52 am

It seems like they continue to stay under 20k feet and under 300 kts more or less. Is this common for an aircraft with 8 test flights or is there a circumstance preventing them opening up the test flight envelope?
 
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par13del
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Re: Boeing 777X Testing/Production Thread - 2020

Wed Feb 12, 2020 1:17 am

Do we know if any adjustments have been made to the structure which failed the pressure test, any chance its just additional monitoring comparing data points from the testing?
 
Max Q
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Re: Boeing 777X Testing/Production Thread - 2020

Wed Feb 12, 2020 2:16 am

bikerthai wrote:
Is it too soon to consider a royal coup and crown the 777-9 the new Queen of the skies?

Moderator, feel free to move this diversion to a different thread.

bt



Yes, it never will be


The 747 permanently retains that title
The best contribution to safety is a competent Pilot.


GGg
 
Sooner787
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Re: Boeing 777X Testing/Production Thread - 2020

Wed Feb 12, 2020 2:25 am

Any idea when the 2nd test bird will have her first flight?
 
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Re: Boeing 777X Testing/Production Thread - 2020

Wed Feb 12, 2020 5:57 am

Forum Moderator
 
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747classic
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Re: Boeing 777X Testing/Production Thread - 2020

Wed Feb 12, 2020 7:25 am

bikerthai wrote:
Is it too soon to consider a royal coup and crown the 777-9 the new Queen of the skies?

Moderator, feel free to move this diversion to a different thread.

bt


It remains a boring twin, all look the same from a distance..
Operating a twin over the ocean, you're always one engine failure from a total emergency.
 
Opus99
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Re: Boeing 777X Testing/Production Thread - 2020

Wed Feb 12, 2020 7:37 am

JohanTally wrote:
It seems like they continue to stay under 20k feet and under 300 kts more or less. Is this common for an aircraft with 8 test flights or is there a circumstance preventing them opening up the test flight envelope?

It’s previously gone up to 25K in a previous flight test but that was for about 10 minutes. Not entirely sure why they haven’t gone higher than that. Maybe that’s due for another test frame?
 
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United787
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Re: Boeing 777X Testing/Production Thread - 2020

Wed Feb 12, 2020 10:34 am

747classic wrote:
It remains a boring twin, all look the same from a distance..


Maybe you should get closer so you can appreciate the subtle differences.

The wings on this bird are beautiful!
 
flipdewaf
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Re: Boeing 777X Testing/Production Thread - 2020

Wed Feb 12, 2020 11:17 am

qf789 wrote:
Boeing 779 N779XW at GEG

Image


I know when we arent supposed to talk about the 373 max in this thread but I had to do a double take to make sure I wasnt looking at a max there, those winglets in that position make it seem like a bigger version.

Fred
Image
 
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Re: Boeing 777X Testing/Production Thread - 2020

Wed Feb 12, 2020 1:40 pm

Opus99 wrote:
Maybe that’s due for another test frame?


Maybe it's just that they have to take so many data points at each elevations. Remember that this is a new wing and will react differently.

They need the data points to verify the CFD, wind tunnel data and to feed the simulators.

Maybe it's just like computing, where if you get more memory, you'll end up filling it with more data.

bt
Intelligent seeks knowledge. Enlightened seeks wisdom.
 
flipdewaf
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Re: Boeing 777X Testing/Production Thread - 2020

Wed Feb 12, 2020 1:56 pm

bikerthai wrote:
Maybe it's just like computing, where if you get more memory, you'll end up filling it with more data.

bt


I call this the handbag effect, no matter the size of the handbag, receipts, lipstick and diaries and gift cards will multiply to fill available space. (the same is true of mens sheds #meetoo :duck: ).

Fred
Image
 
OldAeroGuy
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Re: Boeing 777X Testing/Production Thread - 2020

Wed Feb 12, 2020 8:53 pm

qf789 wrote:


Your GEG pictures are interesting and they show a 777-9 feature I hadn't appreciated before.

The inboard end of the inboard flap has an endplate that fairs smooth with the fuselage when the flaps are retracted. Prior 777 models did not have this feature. This is rather akin to having a winglet on the inboard flap end.

The inboard flap - fuselage intersection when the flaps are extended to the landing position is a problematic flow area. The 777-9 flap endplate maybe an attempt to clean up the airflow in that region.

It may also cater to small increment flap extensions to improve cruise performance.

I don't see the same feature on the 787 inboard flaps.
Airplane design is easy, the difficulty is getting them to fly - Barnes Wallis
 
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Re: Boeing 777X Testing/Production Thread - 2020

Wed Feb 12, 2020 9:08 pm

flipdewaf wrote:
bikerthai wrote:
Maybe it's just like computing, where if you get more memory, you'll end up filling it with more data.

bt


I call this the handbag effect, no matter the size of the handbag, receipts, lipstick and diaries and gift cards will multiply to fill available space. (the same is true of mens sheds #meetoo :duck: ).

Fred

That's why there's no old saying about people who consider handbags half full or half empty. They're always full.
 
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ikolkyo
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Re: Boeing 777X Testing/Production Thread - 2020

Thu Feb 13, 2020 6:43 am

Some great photo and video of the 777X in and around GEG. Such a great looking bird, quiet too.
https://youtu.be/zs4as5acc_4
 
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RRUltrafan
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Re: Boeing 777X Testing/Production Thread - 2020

Thu Feb 13, 2020 12:58 pm

OldAeroGuy wrote:
qf789 wrote:


Your GEG pictures are interesting and they show a 777-9 feature I hadn't appreciated before.

The inboard end of the inboard flap has an endplate that fairs smooth with the fuselage when the flaps are retracted. Prior 777 models did not have this feature. This is rather akin to having a winglet on the inboard flap end.

The inboard flap - fuselage intersection when the flaps are extended to the landing position is a problematic flow area. The 777-9 flap endplate maybe an attempt to clean up the airflow in that region. It also isn't featured for the inboard spoiler, which also seems to move down to accommodate the flap setting

It may also cater to small increment flap extensions to improve cruise performance.

I don't see the same feature on the 787 inboard flaps.


If you look closely the 787 does have this implemented into the inboard flap, its just a lot less pronounced than on the 779
"Everything has an end, but, only the sausage has two" - Albert Einstein
 
OldAeroGuy
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Re: Boeing 777X Testing/Production Thread - 2020

Thu Feb 13, 2020 2:18 pm

RRUltrafan wrote:
OldAeroGuy wrote:
qf789 wrote:


Your GEG pictures are interesting and they show a 777-9 feature I hadn't appreciated before.

The inboard end of the inboard flap has an endplate that fairs smooth with the fuselage when the flaps are retracted. Prior 777 models did not have this feature. This is rather akin to having a winglet on the inboard flap end.

The inboard flap - fuselage intersection when the flaps are extended to the landing position is a problematic flow area. The 777-9 flap endplate maybe an attempt to clean up the airflow in that region. It also isn't featured for the inboard spoiler, which also seems to move down to accommodate the flap setting

It may also cater to small increment flap extensions to improve cruise performance.

I don't see the same feature on the 787 inboard flaps.


If you look closely the 787 does have this implemented into the inboard flap, its just a lot less pronounced than on the 779


Yes, I see a smaller version of the flap endplate on the 787-10.

https://media2.s-nbcnews.com/j/newscms/ ... 0-1000.jpg

Haven't been able to find a similar picture of the 787-8/9. The endplate may be present on the earlier models and I just haven't found the right picture.
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keesje
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Re: Boeing 777X Testing/Production Thread - 2020

Thu Feb 13, 2020 3:01 pm

Yesterday / Wednesday there were Boeing (Mounir) and FAA (Dickson) updates on 777X testing and certification.
Boeing are anticipating 777X entry into service in 2 years. https://leehamnews.com/2020/02/13/max-7 ... more-32577
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SFOtoORD
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Re: Boeing 777X Testing/Production Thread - 2020

Thu Feb 13, 2020 3:35 pm

[twoid][/twoid]
keesje wrote:
Yesterday / Wednesday there were Boeing (Mounir) and FAA (Dickson) updates on 777X testing and certification.
Boeing are anticipating 777X entry into service in 2 years. https://leehamnews.com/2020/02/13/max-7 ... more-32577


The 2022 date cited in the article has unclear attribution. May have been something said outside the actual quote, but it is not clear who provided that date.
 
Opus99
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Re: Boeing 777X Testing/Production Thread - 2020

Thu Feb 13, 2020 3:38 pm

SFOtoORD wrote:
[twoid][/twoid]
keesje wrote:
Yesterday / Wednesday there were Boeing (Mounir) and FAA (Dickson) updates on 777X testing and certification.
Boeing are anticipating 777X entry into service in 2 years. https://leehamnews.com/2020/02/13/max-7 ... more-32577


The 2022 date cited in the article has unclear attribution. May have been something said outside the actual quote, but it is not clear who provided that date.

I think it’s just a typo
 
SDL
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Re: Boeing 777X Testing/Production Thread - 2020

Thu Feb 13, 2020 3:41 pm

I would be surpriced if the first delivery’s isn’t 2021.
Really looking forward to my first flight on one.
 
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NeBaNi
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Re: Boeing 777X Testing/Production Thread - 2020

Thu Feb 13, 2020 4:37 pm

WoodysAeroimag wrote:
N779XW Boeing 777-9 - C/N 64240 / LN 1567 - Passing over Paine Field on its way back to Boeing Field today.

ImageN779XW Boeing 777-9 - C/N 64240 / LN 1567 by Woodys Aeroimages, on Flickr

ImageN779XW Boeing 777-9 - C/N 64240 / LN 1567 by Woodys Aeroimages, on Flickr

ImageN779XW Boeing 777-9 - C/N 64240 / LN 1567 by Woodys Aeroimages, on Flickr

Wow :hearts: She's a stunner! Nice pics!
 
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Revelation
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Re: Boeing 777X Testing/Production Thread - 2020

Thu Feb 13, 2020 6:06 pm

keesje wrote:
Yesterday / Wednesday there were Boeing (Mounir) and FAA (Dickson) updates on 777X testing and certification.
Boeing are anticipating 777X entry into service in 2 years. https://leehamnews.com/2020/02/13/max-7 ... more-32577

TFA says:

When asked about future aircraft certification, Dickson was quick to point out that the level of scrutiny applied to the MAX will not be the template for future certifications. “What we’re doing in terms of certification is not a sustainable proposition going forward in my view,” he said. “It’s not what we would want or desire. You can’t pull all these functions into the government. We’re just not going to have the ability to really oversee the processes effectively.”

Seems one narrative is losing steam.
Wake up to find out that you are the eyes of the world
The heart has its beaches, its homeland and thoughts of its own
Wake now, discover that you are the song that the morning brings
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bikerthai
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Re: Boeing 777X Testing/Production Thread - 2020

Thu Feb 13, 2020 8:24 pm

Does the empennage trailing edge have a slight angle change at the tip? Seem like it's getting more swooping treatment than the 787. A little closer to the shark fin shape we saw when they proposed the original 787 concept.

bt
Intelligent seeks knowledge. Enlightened seeks wisdom.
 
Sooner787
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Re: Boeing 777X Testing/Production Thread - 2020

Thu Feb 13, 2020 8:38 pm

SDL wrote:
I would be surpriced if the first delivery’s isn’t 2021.
Really looking forward to my first flight on one.


I figure the first one I'll see in the flesh will be sitting at DFW in EK colors within a couple years :)
 
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ikolkyo
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Re: Boeing 777X Testing/Production Thread - 2020

Thu Feb 13, 2020 9:15 pm

Anyways, N779XW has popped up online at BFI.
 
OldAeroGuy
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 1:09 am

keesje wrote:
Yesterday / Wednesday there were Boeing (Mounir) and FAA (Dickson) updates on 777X testing and certification.
Boeing are anticipating 777X entry into service in 2 years. https://leehamnews.com/2020/02/13/max-7 ... more-32577


The Leeham article has been edited to remove the suggestion that Boeing CFO Greg Smith is saying 777-9 EIS will be in 2022.

"At an investor conference Wednesday, Boeing CFO Greg Smith said the company is trying to anticipate process changes ahead of the 777X’s expected 2021 entry into service. (Some question if the EIS will slip to 2022.)"

Kessje, you must be among the "Some" mentioned above.
Airplane design is easy, the difficulty is getting them to fly - Barnes Wallis
 
Okcflyer
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 2:19 am

NeBaNi wrote:
WoodysAeroimag wrote:
N779XW Boeing 777-9 - C/N 64240 / LN 1567 - Passing over Paine Field on its way back to Boeing Field today.

ImageN779XW Boeing 777-9 - C/N 64240 / LN 1567 by Woodys Aeroimages, on Flickr

ImageN779XW Boeing 777-9 - C/N 64240 / LN 1567 by Woodys Aeroimages, on Flickr

ImageN779XW Boeing 777-9 - C/N 64240 / LN 1567 by Woodys Aeroimages, on Flickr

Wow :hearts: She's a stunner! Nice pics!


Those engines are abnormally far from centerline, very outbound on the wing. The inboard flap looks nearly twice as long as on the 77W! Did they change the empennage at all? Less thrust per engine helped enable this trade off
 
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 3:49 am

United787 wrote:
747classic wrote:
It remains a boring twin, all look the same from a distance..


Maybe you should get closer so you can appreciate the subtle differences.

The wings on this bird are beautiful!


The wings on the 777X are indeed beautiful, as are the engines, but she is not wearing a crown. The 747, in part because of the high flight deck, has a regal stature that in my opinion no other aircraft shares.
 
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 4:18 am

OldAeroGuy wrote:
The Leeham article has been edited to remove the suggestion that Boeing CFO Greg Smith is saying 777-9 EIS will be in 2022.

"At an investor conference Wednesday, Boeing CFO Greg Smith said the company is trying to anticipate process changes ahead of the 777X’s expected 2021 entry into service. (Some question if the EIS will slip to 2022.)"

A second narrative is also losing steam.
Wake up to find out that you are the eyes of the world
The heart has its beaches, its homeland and thoughts of its own
Wake now, discover that you are the song that the morning brings
The heart has its seasons, its evenings and songs of its own
 
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bikerthai
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 4:57 am

Okcflyer wrote:
Did they change the empennage at all?


If you look at the leading edge near the tip, you'll see the 777X has more curve/rounded.

bt
Intelligent seeks knowledge. Enlightened seeks wisdom.
 
WIederling
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 9:15 am

OldAeroGuy wrote:
Kessje, you must be among the "Some" mentioned above.


A: the Leeham article mentioned 2022 as EIS date before it was changed.

B: what is the probability of a deadline offered by Boeing to actually be met?

C: what would be the quantum leap difference in EIS between Dec 2021 or Jan. 2022 :-))
Murphy is an optimist
 
Schmave
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 3:58 pm

I was watching the flight yesterday on FR24 and N779XW landed at BFI after doing a go-around. I'm guessing it was a planned go-around and not one because they had a poor approach.

Also, does anyone know when they will start doing higher altitude testing? They seem to be staying below 20,000 feet for the flights so far. What do they have to prove out before they go to higher altitudes?
 
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 4:09 pm

Schmave wrote:
... Also, does anyone know when they will start doing higher altitude testing? They seem to be staying below 20,000 feet for the flights so far. What do they have to prove out before they go to higher altitudes?


This is a new wing, so I should imagine that they will want to do a lot of lower altitude flutter testing before they push the altitude. No doubt there is a lot of data gathering to do at various airspeeds, bank angles, and what-not.
Fly, you fools! Fly!
 
StTim
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 4:20 pm

I am trying to recall the A350 test program. I followed it quite closely. I have the following comments.

Go arounds - happen often in testing programs. Not an indication of an issue.
Initial flights were all about opening the envelope. I am sure that in the A350 program they went up to FL35 on the first few flights and to normal cruise speed. Thus I don't buy the testing a new wing comment. I am not sure it is an indication of problems though. To know that you would need inside information.

One thing though they have been flying much more intensively that the A350 did initially. They had a measured fly - analyse, inspect and check, fly again routine initially.
 
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ikolkyo
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 4:46 pm

StTim wrote:
I am trying to recall the A350 test program. I followed it quite closely. I have the following comments.

Go arounds - happen often in testing programs. Not an indication of an issue.
Initial flights were all about opening the envelope. I am sure that in the A350 program they went up to FL35 on the first few flights and to normal cruise speed. Thus I don't buy the testing a new wing comment. I am not sure it is an indication of problems though. To know that you would need inside information.

One thing though they have been flying much more intensively that the A350 did initially. They had a measured fly - analyse, inspect and check, fly again routine initially.


It has already been said this test aircraft is meant to define the handling characteristics of the 779. I’m sure they can go up there but it isn’t necessary for the goals of this test aircraft.

Also I have my doubts Airbus would take an all new aircraft straight up to cruise speed and altitude on its first few flights.
 
airnorth
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 4:58 pm

StTim wrote:
I am trying to recall the A350 test program. I followed it quite closely. I have the following comments.

Go arounds - happen often in testing programs. Not an indication of an issue.
Initial flights were all about opening the envelope. I am sure that in the A350 program they went up to FL35 on the first few flights and to normal cruise speed. Thus I don't buy the testing a new wing comment. I am not sure it is an indication of problems though. To know that you would need inside information.

One thing though they have been flying much more intensively that the A350 did initially. They had a measured fly - analyse, inspect and check, fly again routine initially.


I feel like the first C Series flights were similar in that regard, in that they did get to their ceiling altitude very quickly.
Still fun to watch the 777X testing program unfold, and look forward to the next milestones.
 
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bikerthai
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 5:17 pm

:scratchchin: What do you gain by testing at altitude early?

I wonder if the pressure test failure of the static frame is holding them back until they can get a fix in place.
You know the test pilots are being extra careful during this flight test program.

bt
Intelligent seeks knowledge. Enlightened seeks wisdom.
 
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ikolkyo
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 5:23 pm

airnorth wrote:
StTim wrote:
I am trying to recall the A350 test program. I followed it quite closely. I have the following comments.

Go arounds - happen often in testing programs. Not an indication of an issue.
Initial flights were all about opening the envelope. I am sure that in the A350 program they went up to FL35 on the first few flights and to normal cruise speed. Thus I don't buy the testing a new wing comment. I am not sure it is an indication of problems though. To know that you would need inside information.

One thing though they have been flying much more intensively that the A350 did initially. They had a measured fly - analyse, inspect and check, fly again routine initially.


I feel like the first C Series flights were similar in that regard, in that they did get to their ceiling altitude very quickly.
Still fun to watch the 777X testing program unfold, and look forward to the next milestones.


Looking back at CSeries testings threads, it didn’t hit this until the 12th-13th flight.
 
WIederling
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 5:26 pm

StTim wrote:
I am trying to recall the A350 test program. I followed it quite closely. I have the following comments.


first flight was 13kft, gear retracted, later 25kft Mach .8 duration 4h overall:
https://www.flightglobal.com/a350-compl ... 18.article

does someone have access to fr24 history data for F-WWCF?
Murphy is an optimist
 
Opus99
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 5:33 pm

Nothing technical or weather based caused the go around. Basically there was a wingspan conflict with an aircraft that was holding. So they had to go around unless the wing would’ve hit that aircraft.
 
Opus99
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 5:36 pm

With regards to the altitude this is still initial airworthiness testing so we will see the altitude rise eventually. Probably in the coming test flights. They usually go up to about 30K for the aircraft to pass initial airworthiness.
Last edited by Opus99 on Fri Feb 14, 2020 5:37 pm, edited 1 time in total.
 
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Stitch
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 5:37 pm

bikerthai wrote:
I wonder if the pressure test failure of the static frame is holding them back until they can get a fix in place.


That failure was at a load the frame will never come anywhere near close to during any point in the testing program so I am confident it is not having any impact on the testing.
 
JohanTally
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 5:55 pm

Opus99 wrote:
Nothing technical or weather based caused the go around. Basically there was a wingspan conflict with an aircraft that was holding. So they had to go around unless the wing would’ve hit that aircraft.


Is the wingspan conflict going to be a problem when in revenue service? Will airports with close parallel taxiways that have other large wingspan aircraft on them have to plan around 777-8 and -9?
 
Opus99
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 6:03 pm

JohanTally wrote:
Opus99 wrote:
Nothing technical or weather based caused the go around. Basically there was a wingspan conflict with an aircraft that was holding. So they had to go around unless the wing would’ve hit that aircraft.


Is the wingspan conflict going to be a problem when in revenue service? Will airports with close parallel taxiways that have other large wingspan aircraft on them have to plan around 777-8 and -9?

There’s a document that explains what the airport should do in that scenario. If I find the link I’ll drop it here
 
SDL
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 6:26 pm

She is in the air again...
 
airnorth
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 7:18 pm

ikolkyo wrote:
airnorth wrote:
StTim wrote:
I am trying to recall the A350 test program. I followed it quite closely. I have the following comments.

Go arounds - happen often in testing programs. Not an indication of an issue.
Initial flights were all about opening the envelope. I am sure that in the A350 program they went up to FL35 on the first few flights and to normal cruise speed. Thus I don't buy the testing a new wing comment. I am not sure it is an indication of problems though. To know that you would need inside information.

One thing though they have been flying much more intensively that the A350 did initially. They had a measured fly - analyse, inspect and check, fly again routine initially.


I feel like the first C Series flights were similar in that regard, in that they did get to their ceiling altitude very quickly.
Still fun to watch the 777X testing program unfold, and look forward to the next milestones.


Looking back at CSeries testings threads, it didn’t hit this until the 12th-13th flight.


Yes you are more correct than I was in your recollection, it was actually much much later than that even, it looks like it was flight #51 with FTV 1 before it finally hit FL400. In re-reading the threads it was a painful flight test program to watch unfold, lol!
viewtopic.php?f=3&t=562921&start=1600

This program seems to be more open to public scrutiny, its amazing what a difference 6 or 7 years makes in our ability to track and monitor from our side of the fence.
On that topic, it looks like N779XW just touched down in GEG and maximum altitude was 18,975 feet according to FR24.
 
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ikolkyo
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Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 7:24 pm

airnorth wrote:
ikolkyo wrote:
airnorth wrote:

I feel like the first C Series flights were similar in that regard, in that they did get to their ceiling altitude very quickly.
Still fun to watch the 777X testing program unfold, and look forward to the next milestones.


Looking back at CSeries testings threads, it didn’t hit this until the 12th-13th flight.


Yes you are more correct than I was in your recollection, it was actually much much later than that even, it looks like it was flight #51 with FTV 1 before it finally hit FL400. In re-reading the threads it was a painful flight test program to watch unfold, lol!
viewtopic.php?f=3&t=562921&start=1600

This program seems to be more open to public scrutiny, its amazing what a difference 6 or 7 years makes in our ability to track and monitor from our side of the fence.
On that topic, it looks like N779XW just touched down in GEG and maximum altitude was 18,975 feet according to FR24.



Ah you weren’t that far off, in this page of the flight testi thread they were speaking of flight test 11 or 12 and later on it was said it hit Mach .8 and above 30,000ft on a test flight. Which is what I’d consider typical cruising profile.
viewtopic.php?f=3&t=562921&start=1050
 
cat3appr50
Posts: 177
Joined: Wed Jan 16, 2013 10:44 pm

Re: Boeing 777X Testing/Production Thread - 2020

Fri Feb 14, 2020 10:59 pm

Anybody have an educated guess (by general past experience that is with new aircraft flight testing, absolutely not asking for any confidential information) what the total (ballpark) payload may be at this point of flight testing (engineers, techs., ops. people, test eqpt., ballast, etc.)?

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