Search found 31 matches

by RRUltrafan
Tue Jul 23, 2019 11:52 am
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 638
Views: 165530

Re: Boeing 777X Testing Thread - 2019

It probably won't be TOW that is deciding the increase in thrust. You can compare a route with weight of a 787-10 to a route where the 787-9 would weigh the same, and the theoretical take-off thrust shouldn't be as high as the 7% the Trent 1000 TEN and GENX's uprating. As has been said before, paras...

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by RRUltrafan
Mon Jul 15, 2019 1:19 pm
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 638
Views: 165530

Re: Boeing 777X Testing Thread - 2019

Enough thrust headroom for a 777-10 How about engine wear? Does it also has enough headroom for a overall thrust increase? The engine wear problem is a long term component issue that comes into effect when the engine is operated at long, cruise- to high thrust intervals. It affects engine life-time...

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by RRUltrafan
Mon Jul 15, 2019 6:39 am
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 638
Views: 165530

Re: Boeing 777X Testing Thread - 2019

https://samchui.com/2019/07/14/ge9x-set ... SwfVdMzYWo
-->

GE9X has broken a world record, running up to 134,300 lb/f, surpassing he GE90-115b which ran up to 127,900 lb/f
https://samchui.com/2019/07/14/ge9x-set ... SwfVdMzYWo

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by RRUltrafan
Fri Jun 21, 2019 3:50 am
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 638
Views: 165530

Re: Boeing 777X Testing Thread - 2019

The fuselage looks kinda short, but damn those engines are massive and really elegant

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by RRUltrafan
Tue Jun 18, 2019 12:53 am
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 638
Views: 165530

Re: Boeing 777X Testing Thread - 2019

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-france-airshow-ge-boeing/ge-says-forced-to-redesign-part-for-ge9x-jet-engine-idUSKCN1TI0OG I'm not exactly sure which ones, but it seems to be the st...

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by RRUltrafan
Sat Jun 15, 2019 7:54 am
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 638
Views: 165530

Re: Boeing 777X Testing Thread - 2019

Sorry for not quite catching up on this, but why exactly is the rubber band there?

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by RRUltrafan
Thu May 16, 2019 6:14 am
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 638
Views: 165530

Re: Boeing 777X Testing Thread - 2019

I'd assume that they would test the fuselage strength through increasing and decreasing pressure over different gradients and time scales. Then the wings will be tested, and due to the manpower that would need to be around to monitor the situation, i doubt that it will be running 24/7.

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by RRUltrafan
Mon May 06, 2019 6:12 am
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 638
Views: 165530

Re: Boeing 777X Testing Thread - 2019

zululima yes thats what I was referring to

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by RRUltrafan
Sun May 05, 2019 9:35 am
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 638
Views: 165530

Re: Boeing 777X Testing Thread - 2019

Does anyone know why there seems to be a sort of ridge towards the rear of the GE9X's nacelle? At the trailing edge of the nacelle, it comes down straight, but at around the halfway point the nacelle extends further back.

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by RRUltrafan
Tue Mar 19, 2019 4:16 am
Forum: Civil Aviation
Topic: Boeing 777-9 roll out delayed (originally planned for 13 Mar)
Replies: 207
Views: 47002

Re: Boeing 777-9 roll out delayed (originally planned for 13 Mar)

I am not quite sure I get this... could someone please explain the landing gear config. on the A350 and 777-9? see: https://www.youtube.com/watch?v=C2cxEndx-Q0 NLG doors on the A350 are two paired sets. The smaller rear one stays open to have the gear leg stick out the larger set reaching forward t...

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by RRUltrafan
Sun Mar 17, 2019 6:01 am
Forum: Civil Aviation
Topic: Boeing 777-9 roll out delayed (originally planned for 13 Mar)
Replies: 207
Views: 47002

Re: Boeing 777-9 roll out delayed (originally planned for 13 Mar)

Big arrays of LED's. In case you miss a few posts below yours, the lighting under the wheel well is dark, but you can see a pair of lights here: https://i.ibb.co/XShJCNK/20190313-111738.jpg so the front gear doors stay open full length? ( do I rightly remember the A350 thingies to be segmented and ...

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by RRUltrafan
Wed Feb 27, 2019 4:37 pm
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 638
Views: 165530

Re: Boeing 777X Testing Thread - 2019

MileHFL400 wrote:
Would I be correct in assuming that since the B777-8 will be getting the same sized engines as the -9 and have lower cruise thrust levels than the B777-300ER and -9 the fan rotation speed would be fairly low at steady cruise?


I believe both types will have the same engine and thrust ratings.

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by RRUltrafan
Fri Feb 22, 2019 12:43 am
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 638
Views: 165530

Re: Boeing 777X Testing Thread - 2019

What about the production line? will this be completely separate or will it share commonality with the original 777 production lines (a modified version or something)

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by RRUltrafan
Thu Feb 21, 2019 12:41 pm
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 638
Views: 165530

Re: Boeing 777X Testing Thread - 2019

The first, the N779XW LN1567 will be in which colors of Boeing? Does orange equal the 747-8 or Boeing's traditional blue? All the renders have been a maroon red house livery. Don't expect that to change. Go check YouTube for early Boeing promo videos. Boeing is switching to a standard blue house li...

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by RRUltrafan
Thu Feb 21, 2019 12:16 am
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 638
Views: 165530

Re: Boeing 777X Testing Thread - 2019

The first 777-9X for Lufthansa is coming together in the assembly line now. [http://www.airliners.de/erste-777-9x-lufthansa-gestalt/48964] ( could only find in German or Dutch)

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by RRUltrafan
Fri Jan 11, 2019 12:20 pm
Forum: Civil Aviation
Topic: Airbus A380 Production/Delivery Thread - 2019
Replies: 91
Views: 20382

Re: Airbus A380 Production/Delivery Thread - 2019

Anybody have the rollout dates for the next two ANA A380's?

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by RRUltrafan
Fri Jan 11, 2019 12:18 pm
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 638
Views: 165530

Re: Boeing 777X Testing Thread - 2019

Oke, thanks jagraham! Does anyone also know how high the GE9X has been run up to (e.g. the GE90-115b was run up to 127k lb/f)? What about the dates for static testing... haven't heard anything about that yet. The static testing is a must before the first flight anyway, but what will be covered throu...

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by RRUltrafan
Fri Jan 11, 2019 1:06 am
Forum: Civil Aviation
Topic: Boeing 777X Testing Thread - 2019
Replies: 638
Views: 165530

Re: Boeing 777X Testing Thread - 2019

So the 777x is maxed out on pavement loading with the 6 wheel bogeys at 351 tonnes (same MTOW as the -300ER) right? If airlines really wanted an MTOW bump would it be feasible for Boeing to introduce something like an 8 wheel truck with two wheels added over the center wheels (in a 2-4-2 wheel confi...

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by RRUltrafan
Thu Sep 13, 2018 3:21 am
Forum: Technical/Operations
Topic: 777 maxed out pavement loading
Replies: 1
Views: 2208

777 maxed out pavement loading

Just out of curiosity would it be feasible to increase the MTOW of the 777-9x by increasing the number of wheels per bogey from 6-8 or 12 similar to the TU-144 to allow better load distribution onto the pavement? The wing and engines could quite possibly take the load considering the fact that they ...

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by RRUltrafan
Thu Mar 15, 2018 1:55 am
Forum: Technical/Operations
Topic: Turbofan engine Growth
Replies: 16
Views: 2562

Re: Turbofan engine Growth

Ok. Thanks

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by RRUltrafan
Tue Mar 13, 2018 1:09 am
Forum: Technical/Operations
Topic: Turbofan engine Growth
Replies: 16
Views: 2562

Turbofan engine Growth

What determines the capability of the amount an engine can grow and be developed without changing the design? E.g the PW4000 on the 777 was maxed out in terms of growth, and I'm curious what design aspect determines this, and why?

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by RRUltrafan
Mon Mar 05, 2018 12:53 pm
Forum: Technical/Operations
Topic: Barometer settings
Replies: 18
Views: 1514

Barometer settings

In the flight sim I use, after I take off, the checklist tells me to set barometers to 'STD' as required. What does STD stand for? I can't seem to find any information on it by googling it. And why is the standard QNH setting 1013.25 hPa or 29.92 in Hg?

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by RRUltrafan
Thu Mar 01, 2018 3:54 am
Forum: Civil Aviation
Topic: Airbus Beluga XL Production Thread
Replies: 268
Views: 64382

Re: Airbus Beluga XL Production Thread

Would it be more efficient to neo the beluga XL with the A330neo wing? I think it would be more efficient in terms of fuel costs if they have a larger engine capable of producing more thrust if needed, which would compliment climb performance at MTOW or somewhere near it. The winglet would also incr...

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by RRUltrafan
Sun Feb 25, 2018 1:55 pm
Forum: Travel, Polls & Preferences
Topic: Best Sounding Engine Spool Up
Replies: 28
Views: 5711

Re: Best Sounding Engine Spool Up

Trent 1000 rollers and the Trent XWB roller. Man, those things are just really melodious, like pressing the exact right note combinations on a piano, just sounds satisfyingly fantastic.

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by RRUltrafan
Wed Feb 21, 2018 6:25 am
Forum: Technical/Operations
Topic: RR triple spool
Replies: 50
Views: 5247

Re: RR triple spool

So the higher loaded 8 stage IPC is for higher efficiency and a better balance between the spools.

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by RRUltrafan
Wed Feb 07, 2018 12:59 am
Forum: Technical/Operations
Topic: RR triple spool
Replies: 50
Views: 5247

Re: RR triple spool

Apprentice: the GE-90's (especially the higher thrust versions i.e. -110b - 115b) are much heavier on the 777's than the Rollers/PW engines. The Trent 800 Rollers were favored by airlines who wanted slightly less range with a higher passenger and cargo capacity, while the GE-90's were favored for ra...

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by RRUltrafan
Mon Feb 05, 2018 3:57 am
Forum: Technical/Operations
Topic: RR triple spool
Replies: 50
Views: 5247

Re: RR triple spool

So if the triple spools boast efficiency on the large long range aircrafts during climb, why does it lose its appeal and efficiency with smaller aircrafts? Shouldn't it be optimal for the smaller aircrafts (A320, 737, CS100 etc) with shorter range?

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by RRUltrafan
Fri Feb 02, 2018 2:34 am
Forum: Technical/Operations
Topic: RR triple spool
Replies: 50
Views: 5247

Re: RR triple spool

K. Sorry for the misstated no. of HPC blisks/blings... So in the end, the number of stages for each spool is just for optimal efficiency of the different spools to achieve a higher and better compression ratio as well as a more balanced engine?

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by RRUltrafan
Fri Feb 02, 2018 1:16 am
Forum: Technical/Operations
Topic: RR triple spool
Replies: 50
Views: 5247

Re: RR triple spool

Thanks

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by RRUltrafan
Thu Feb 01, 2018 12:13 pm
Forum: Technical/Operations
Topic: RR triple spool
Replies: 50
Views: 5247

RR triple spool

Does anyone know why the the triple spool Rollers have 8 IPC stages and only 7 HPC and what the advantage of this could be? Isn't it better to load the HPC more heavily than the IPC, or having an even amount of blisks/blings in each compressor stage to make it more equally loaded?

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