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jupiter2
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Re: Boeing 777X Testing Thread - 2019

Thu Jun 20, 2019 10:41 pm

ikolkyo wrote:
Here is some video, https://twitter.com/jenschuld/status/11 ... 00193?s=21

Sharp looking aircraft!


The head on shot in the video is amazing, those engines are enormous.
 
musman9853
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Re: Boeing 777X Testing Thread - 2019

Thu Jun 20, 2019 10:43 pm

clickhappy wrote:
777-9 has taken the runway for the first time. Airliners.net has rejected my uploads so, here you go:

https://www.flickr.com/photos/royalscot ... ed-public/



what a beauty!
Welcome to the City Beautiful.
 
Checklist787
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Re: Boeing 777X Testing Thread - 2019

Thu Jun 20, 2019 10:57 pm

musman9853 wrote:
clickhappy wrote:
777-9 has taken the runway for the first time. Airliners.net has rejected my uploads so, here you go:

https://www.flickr.com/photos/royalscot ... ed-public/



what a beauty!

Beauty!
 
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ikolkyo
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Re: Boeing 777X Testing Thread - 2019

Thu Jun 20, 2019 11:02 pm

Am I the only one that thinks the thicker inlet of the GE9X gives it a smaller look compared to the -115B? I’m aware the GE9X is larger.
 
Lukas757
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Re: Boeing 777X Testing Thread - 2019

Thu Jun 20, 2019 11:23 pm

ikolkyo wrote:
Am I the only one that thinks the thicker inlet of the GE9X gives it a smaller look compared to the -115B? I’m aware the GE9X is larger.


I’m with you. Somehow reminds me of the CFM56.
 
airzona11
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Re: Boeing 777X Testing Thread - 2019

Thu Jun 20, 2019 11:37 pm

Lukas757 wrote:
ikolkyo wrote:
Am I the only one that thinks the thicker inlet of the GE9X gives it a smaller look compared to the -115B? I’m aware the GE9X is larger.


I’m with you. Somehow reminds me of the CFM56.


Totally agree. Cannot wait for the first time in person, what a beast!
 
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RRUltrafan
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Re: Boeing 777X Testing Thread - 2019

Fri Jun 21, 2019 3:50 am

The fuselage looks kinda short, but damn those engines are massive and really elegant
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seabosdca
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Re: Boeing 777X Testing Thread - 2019

Fri Jun 21, 2019 4:12 am

The massive wings and nacelles have the oddest effect on the aircraft's appearance. It looks almost small. Until you start focusing on known reference points (the cockpit windows, the triple main bogey, nearby objects) and you realize that the thing is actually absolutely enormous.
 
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Re: Boeing 777X Testing Thread - 2019

Fri Jun 21, 2019 5:21 am

https://www.king5.com/amp/article/tech/ ... ssion=true

Sent from my SM-J415F using Tapatalk
 
TheF15Ace
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Re: Boeing 777X Testing Thread - 2019

Fri Jun 21, 2019 7:32 am

https://www.youtube.com/watch?v=mXefF0N0VSE

Another video of the taxi test. She is one gorgeous bird.
 
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Revelation
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Re: Boeing 777X Testing Thread - 2019

Fri Jun 21, 2019 11:56 am

Image
Boeing 777-9 N779XW by royalscottking, on Flickr

Beautiful!

So, how many minivans can fit into a 777-9X? :biggrin:
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kengo
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Re: Boeing 777X Testing Thread - 2019

Fri Jun 21, 2019 2:51 pm

The overall proportion of the 779 looks much better than the 77W, despite the former being a few meters longer. Must be the huge GE9X engines. Looking forward to the first flight and hope the wings flex as much as the 787s.
 
morrisond
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Re: Boeing 777X Testing Thread - 2019

Fri Jun 21, 2019 3:03 pm

What is the typical time from first Taxi test to First flight?
 
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7BOEING7
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Re: Boeing 777X Testing Thread - 2019

Fri Jun 21, 2019 3:16 pm

morrisond wrote:
What is the typical time from first Taxi test to First flight?


A day or two — but not this time. The GE engine issue is a longevity thing — one would think they could complete a lot of the non-engine related testing to shorten EIS delay. Strange???
 
Prost
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Re: Boeing 777X Testing Thread - 2019

Fri Jun 21, 2019 3:21 pm

Very cool seeing the wingtips fold down in the King5 video.
 
morrisond
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Re: Boeing 777X Testing Thread - 2019

Fri Jun 21, 2019 3:40 pm

7BOEING7 wrote:
morrisond wrote:
What is the typical time from first Taxi test to First flight?


A day or two — but not this time. The GE engine issue is a longevity thing — one would think they could complete a lot of the non-engine related testing to shorten EIS delay. Strange???


If it's longevity would that hold them back from a first flight?

I remember posting a few weeks back that someone I think on Matt Cawby said June 24 was the date - this coming Monday.

Still possible or do the engine issues preclude any flight until resolved?
 
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Lilienthal
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Re: Boeing 777X Testing Thread - 2019

Fri Jun 21, 2019 8:12 pm

seabosdca wrote:
The massive wings and nacelles have the oddest effect on the aircraft's appearance. It looks almost small. Until you start focusing on known reference points (the cockpit windows, the triple main bogey, nearby objects) and you realize that the thing is actually absolutely enormous.



I have had the same though with all the new twin wide bodies, the A350 and especially the 787. Engines get bigger, flaps and slats have fewer parts and a cleaner look, windows get bigger. Without a reference point, the proportions make them seem like single aisles.
 
justloveplanes
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 2:23 am

It doesn't sound unreasonable that they could do some flight testing too, but I can understand why not. The accelerated wear on the engines was under huge stresses. Wondering why simple low altitude tests that don't tax the engines wouldn't be feasible.
 
hivue
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 2:34 am

morrisond wrote:
If it's longevity would that hold them back from a first flight?


They know changes to the engine are needing to be made. They may want to run as much of the test campaign with as near the production spec engine as they can.
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777222LR
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 2:51 am

Looking at the photos, I'm trying to discern the differences between the 777X and the 777-300ER. I know the obvious, but is the landing gear taller on this one and is the dihedral of the wings on the 777X larger? Also noticing we have an additional flap canoe and when the wings unfold, there is still little notches hanging below the wingtip?
 
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seabosdca
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 3:57 am

777222LR wrote:
Looking at the photos, I'm trying to discern the differences between the 777X and the 777-300ER. I know the obvious, but is the landing gear taller on this one and is the dihedral of the wings on the 777X larger? Also noticing we have an additional flap canoe and when the wings unfold, there is still little notches hanging below the wingtip?


The wing is so much bigger on the 777X that it changes the proportions of the whole aircraft. It's also a different shape. That's where I'd look first.

Another difference: only 4 full-size doors per side on the X, with much more space between doors.
 
Max Q
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 4:19 am

Good looking aircraft, the reshaped vertical fin a la 787 looks a lot better than the ‘too small’ looking fin on the classic
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lightsaber
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 4:59 am

RRUltrafan wrote:
The GE9X problems seem to be from unexpected excessive wear on compressor stator vanes, and now requires a redesign
https://www.reuters.com/article/us-fran ... SKCN1TI0OG

I'm not exactly sure which ones, but it seems to be the stationary ones which are either in the IPC or the later HPC stages of the engine.

This is bad. Excessive stator wear risks a compressor stall. Basically, loss of thrust. The best choice is redesign.

Lightsaber
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seabosdca
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 5:06 am

I think it was Jon Ostrower who reported that the redesign is already complete, but parts now need to be manufactured, installed, and tested.
 
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qf789
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 9:13 am

Future 777X operators have their tails painted on the side of the first 779 fuselage

Image

https://twitter.com/JenSchuld/status/11 ... 95525?s=20
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qf789
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 9:17 am

Forum Moderator
 
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Revelation
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 2:10 pm

That head on shot is amazing.

To me it looks like a giant bird of prey.

Excellent photo, but am also looking forward to a head on view with less clutter in the background.
Wake up to find out that you are the eyes of the world
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Noshow
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 2:16 pm

Didn't Mr. McAllister say at Paris the 777-9 first flight slipped to before year's end due to the engine mods?
Looks like they are ready?
 
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Revelation
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 2:24 pm

Noshow wrote:
Didn't Mr. McAllister say at Paris the 777-9 first flight slipped to before year's end due to the engine mods?
Looks like they are ready?

Their willingness to do taxi tests on the ground doesn't mean they are willing to start flight testing.

The ground test will at least put wind over the wings and let them get initial readings from most of the test instruments for the first time.

Otherwise we wait till all systems are go.

Seems odd that we get so many people criticizing Boeing over safety yet when they say they prefer to wait for the improved engines people seem to display impatience.

What Lightsaber just posted about stator failure leading to loss of thrust is pretty concerning.

Keep in mind the rest of the engine might have some unknown flaw that couples itself with the known flaw and an even more serious issue could arise.

Better to sort all this out ahead of time on the ground.
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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lightsaber
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 2:48 pm

In my opinion, the current engine errosion issue is a risk for thrust loss. There is no real risk if the wheels stay on the ground. There is risk, until the compressor is fixed, on flying. Enough risk that I wouldn't authorize a flight.

Then again, I'm currently in trouble at work as I just halted a very visible test. When the executives came to talk me into testing, I literally couldn't shut up for ten minutes on why I wouldn't allow the test as I was annoyed my tech fellows were being ignored too!

Funny thing, my next 3 managers/executives up the chain lost schedule authority two days ago. I have it now until the fix meets my satisfaction. (Chief engineer and tech fellows are wondering, as I am myself, how that happened...) But oh... Managers do not like reality impacting schedules. Hopefully GE is listening to their equivalent engineers before executives get an earful.

Problems happen. Sometimes scary ones. To me, I know solutions to fix this compressor problem, so it is not scary when addressed. It is scary, with as little as I know from the outside as compressor stator errosion creates nasty compressor stalls. There is a reason well defined erosion limits exist and require borroscope inspections. If done wrong, you end up with the PW4062 reputation for compressor stalls.

Boeing and GE can not afford a flight test compressor stall. Not when both engines will be similarly worn and thus at risk of a simultaneous compressor stall. (The PW4062 issues, now fixed, happened near overhaul.).

But let me emphasize I see an appropriate timeline for an appropriate fix. I would fly the 779 at EIS or even during flight testing.

Revelation wrote:
That head on shot is amazing.

To me it looks like a giant bird of prey.

Excellent photo, but am also looking forward to a head on view with less clutter in the background.

That head on shot looks like a bird if prey armed with two massive revolvers! Impressive.

Lightsaber
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B747Saeed
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 2:55 pm

ikolkyo wrote:
Am I the only one that thinks the thicker inlet of the GE9X gives it a smaller look compared to the -115B? I’m aware the GE9X is larger.

You are not the only one. I was kind of disappointed to see how "small" the engines looked when the first photos of the 777X were released.
 
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777222LR
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 3:33 pm

B747Saeed wrote:
ikolkyo wrote:
Am I the only one that thinks the thicker inlet of the GE9X gives it a smaller look compared to the -115B? I’m aware the GE9X is larger.

You are not the only one. I was kind of disappointed to see how "small" the engines looked when the first photos of the 777X were released.


Agreed. The new inlet (a la 787 inlet) makes the engine look smaller to me. However, when you put this engine on a 747 like they did for testing, it looks huge. I guess since we have a reference to smaller engines. It kind of messes with my mind because the 777 is a visually smaller aircraft, so in a sense, it should seem bigger on a 777.

Can anyone tell me why the new Boeings have this style of inlet?
 
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Stitch
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 4:31 pm

Still looks more balanced then the A330-300.

(The larger Trents on the A330-900 really help the engine-airframe balance, IMO.)
 
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lightsaber
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 5:19 pm

777222LR wrote:
B747Saeed wrote:
ikolkyo wrote:
Am I the only one that thinks the thicker inlet of the GE9X gives it a smaller look compared to the -115B? I’m aware the GE9X is larger.

You are not the only one. I was kind of disappointed to see how "small" the engines looked when the first photos of the 777X were released.


Agreed. The new inlet (a la 787 inlet) makes the engine look smaller to me. However, when you put this engine on a 747 like they did for testing, it looks huge. I guess since we have a reference to smaller engines. It kind of messes with my mind because the 777 is a visually smaller aircraft, so in a sense, it should seem bigger on a 777.

Can anyone tell me why the new Boeings have this style of inlet?

Why the new inlet:
Improved laminar flow inside and around engines. Nacelle drag is reduced by the external changes. The improved laminar flow up to the fan on the inside also means less drag and more predictable inlet to the fan which allows the design of a more efficient fan.

These inlets are enabled by a clever aerodynamic analysis that enables the engines to be closer to the wing (vertical separation is reduced). There is a nacelle/wing interaction that can be good or really bad. Boeing/GE have figured out how to make it always good.

Lightsaber
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AC77X
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 6:04 pm

My only problem with this plane is that the engines are so large, they make the plane itself look shorter in comparison then it really is.
Besides that, I think it would be cool to see all of the 777 variants together. It is one of their most lucrative planes after all :spin:
 
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NeBaNi
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 7:15 pm

Looks amazing! Anyone know why Boeing is moving towards nacelle designs with larger metallic leading edges or nacelle lips? Smoother/Later transition to turbulence?
 
Noshow
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 7:33 pm

For laminar flow likely? You'd have some unpainted (standard) precision part with some super clean surface that doesn't get painted and functionally "ruined" by adding the CI of some airline customer.
 
SQ317
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 8:22 pm

Forgive my ignorance, but I assume there's an option to add an overwing exit to increase the exit capacity to >440? EK already have 77Ws configured to 428 to with the 9 they'd probably want to go above 440 in an equivalent config.
 
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Stitch
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Re: Boeing 777X Testing Thread - 2019

Sat Jun 22, 2019 8:43 pm

SQ317 wrote:
Forgive my ignorance, but I assume there's an option to add an overwing exit to increase the exit capacity to >440? EK already have 77Ws configured to 428 to with the 9 they'd probably want to go above 440 in an equivalent config.


The overwing exit has been permanently deleted on the 777-9. Instead, customers can add a Type C door between Door 3 and Door 4.

The four available door options and their Exit Limits are:

A-A-A-A (440)
C-A-A-A (385)
C-A-A-C-A (440)
A-A-A-C-A (495)

I expect the majority, if not the entire run, to be delivered with four Type A doors and 440-seat Exit Limit
 
carlokiii
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Re: Boeing 777X Testing Thread - 2019

Sun Jun 23, 2019 2:07 am

Stitch wrote:
SQ317 wrote:
Forgive my ignorance, but I assume there's an option to add an overwing exit to increase the exit capacity to >440? EK already have 77Ws configured to 428 to with the 9 they'd probably want to go above 440 in an equivalent config.


The overwing exit has been permanently deleted on the 777-9. Instead, customers can add a Type C door between Door 3 and Door 4.

The four available door options and their Exit Limits are:

A-A-A-A (440)
C-A-A-A (385)
C-A-A-C-A (440)
A-A-A-C-A (495)

I expect the majority, if not the entire run, to be delivered with four Type A doors and 440-seat Exit Limit

And as an example, the subject 777X airliner in the photos above is actually the 495-seat Exit Limit version.
 
aviationaware
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Re: Boeing 777X Testing Thread - 2019

Sun Jun 23, 2019 4:09 am

The engines are absolutely ginormous and the folding wingtips look smooth in action. Let's hope they won't require too much maintenance!
 
tvarad
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Re: Boeing 777X Testing Thread - 2019

Sun Jun 23, 2019 4:37 am

Revelation wrote:
Image
Boeing 777-9 N779XW by royalscottking, on Flickr

Beautiful!

So, how many minivans can fit into a 777-9X? :biggrin:


Forget that. The real question is how many of that minivan will fit in it's engine pod!
 
Aviation737
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Re: Boeing 777X Testing Thread - 2019

Sun Jun 23, 2019 5:04 am

Is there a photo of the cockpit yet?
 
airlinebuilder
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Re: Boeing 777X Testing Thread - 2019

Sun Jun 23, 2019 6:29 am

i have this sense on the 777X that they are still have plans for a bigger engine in the future just like the 777 to the 77W given the main gear height and the nose gear swing allowance ---- just a speculation.

p.s. wandering why it is not selling well
 
kengo
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Re: Boeing 777X Testing Thread - 2019

Sun Jun 23, 2019 6:46 am

Aviation737 wrote:
Is there a photo of the cockpit yet?


Not the real thing but I think this is the closest you will get until the real cockpit is revealed.

https://www.youtube.com/watch?v=TOJnj_tLD4s&t=12s
 
Armadillo1
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Re: Boeing 777X Testing Thread - 2019

Sun Jun 23, 2019 8:16 am

Landing gear looks longer


And i see only 4 doors on this plane so it 440 exit limit?
 
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Polot
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Re: Boeing 777X Testing Thread - 2019

Sun Jun 23, 2019 10:22 am

Armadillo1 wrote:
Landing gear looks longer


And i see only 4 doors on this plane so it 440 exit limit?

This plane has 5 exit pairs, in most of the recent pics taken from ground level the wing is blocking the view of the exits just behind the wing.
 
marcelh
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Re: Boeing 777X Testing Thread - 2019

Sun Jun 23, 2019 10:26 am

qf789 wrote:
Future 777X operators have their tails painted on the side of the first 779 fuselage

Image

https://twitter.com/JenSchuld/status/11 ... 95525?s=20


There is some space for a few more :bigthumbsup:
Looking at the pictures and movies, my first impression is: "what a weird 77W" :scratchchin:, but it's definiately better looking than a 77W.
 
SQ317
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Re: Boeing 777X Testing Thread - 2019

Sun Jun 23, 2019 12:03 pm

carlokiii wrote:
Stitch wrote:
SQ317 wrote:
Forgive my ignorance, but I assume there's an option to add an overwing exit to increase the exit capacity to >440? EK already have 77Ws configured to 428 to with the 9 they'd probably want to go above 440 in an equivalent config.


The overwing exit has been permanently deleted on the 777-9. Instead, customers can add a Type C door between Door 3 and Door 4.

The four available door options and their Exit Limits are:

A-A-A-A (440)
C-A-A-A (385)
C-A-A-C-A (440)
A-A-A-C-A (495)

I expect the majority, if not the entire run, to be delivered with four Type A doors and 440-seat Exit Limit

And as an example, the subject 777X airliner in the photos above is actually the 495-seat Exit Limit version.


Ah yes so it is, that big wing rather obscures it!
 
OldAeroGuy
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Re: Boeing 777X Testing Thread - 2019

Sun Jun 23, 2019 1:13 pm

lightsaber wrote:
These inlets are enabled by a clever aerodynamic analysis that enables the engines to be closer to the wing (vertical separation is reduced). There is a nacelle/wing interaction that can be good or really bad. Boeing/GE have figured out how to make it always good.

Lightsaber


This "clever aerodynamic analysis", when applied to the 737 MAX, has lead to endless uninformed speculation that the design is "fatally flawed".
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