Search found 243 matches

by DenverTed
Mon Aug 19, 2019 5:41 am
Forum: Civil Aviation
Topic: Rumor: Airbus to launch A350-1000ULR
Replies: 372
Views: 60250

Re: Rumor: Airbus to launch A350-1000ULR

When do the GTF engines go into service on the A350 or 787? I would think 2030 at the earliest. And, do they even fit? If the A350 and 787 need taller landing gear to fit the larger fan engines, that is a whole other conundrum.

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by DenverTed
Sun Aug 18, 2019 5:45 am
Forum: Civil Aviation
Topic: Boeing delays 777-8X entry into service
Replies: 153
Views: 24865

Re: Boeing delays 777-8X entry into service

olle wrote:

But do not 777x also have structural limitations as well? How much over the original 777W can it go?


Yes, if they are limited by the current landing gear and tires to 775Klb, that will be a problem for harvesting the full potential of the big wing and engines.

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by DenverTed
Sat Aug 17, 2019 7:21 pm
Forum: Civil Aviation
Topic: Boeing delays 777-8X entry into service
Replies: 153
Views: 24865

Re: Boeing delays 777-8X entry into service

What is the usable cabin seating area of the two aircraft? I'm estimating he A350-1000 is 5% more than the 778. There is only a ~10m2 difference between the two, but the A351 cabin is about 5 meters longer. The empty weight of the 779 is 400Klb, the A3510 342, so a difference of 17%. Does the 779 h...

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by DenverTed
Sat Aug 17, 2019 4:24 pm
Forum: Civil Aviation
Topic: Boeing delays 777-8X entry into service
Replies: 153
Views: 24865

Re: Boeing delays 777-8X entry into service

What is the usable cabin seating area of the two aircraft? I'm estimating he A350-1000 is 5% more than the 778.

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by DenverTed
Sat Aug 17, 2019 4:06 pm
Forum: Civil Aviation
Topic: Boeing delays 777-8X entry into service
Replies: 153
Views: 24865

Re: Boeing delays 777-8X entry into service

The empty weight of the 779 is 400Klb, the A3510 342, so a difference of 17%. Does the 779 have 17% more seating? I assume the engine and wing of the 779 will be more efficient per pound flown. I guess the big question is what is the empty weight of the 777-8? Based on the difference between the 773...

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by DenverTed
Fri Aug 16, 2019 3:56 pm
Forum: Civil Aviation
Topic: Boeing delays 777-8X entry into service
Replies: 153
Views: 24865

Re: Boeing delays 777-8X entry into service

777-9 : Larger cabin than the A35K but less payload / range, less fuel efficient I read the 779 payload was 73.5 t versus A3510 of 68, and fuel of 200kl versus 159kl, so it looks like the 779 has slightly more payload. But apples to apples if they both have 68t of payload, how far does the fuel tak...

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by DenverTed
Thu Aug 15, 2019 6:30 pm
Forum: Civil Aviation
Topic: Boeing delays 777-8X entry into service
Replies: 153
Views: 24865

Re: Boeing delays 777-8X entry into service

The 777x wing and engine combo looks to be more capable than the A350, especially with the record of the new GE 9 engine. I think they can upgrade the available thrust. The question is what to do with it. Obviously not much of an asset on the 778, as the lighter fuselage of the A350 beats it. The on...

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by DenverTed
Tue Aug 13, 2019 5:52 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 2465
Views: 322285

Re: Boeing 737MAX Grounded Worldwide Q3 2019

[quote="Revelation"[list]] FAA has been in the loop for all the MAX testing (they were part of the testing that found the 'cosmic ray' issue) [/quote] Did they find the cosmic ray issue in testing, or did they simulate a cosmic ray event to a specific test? Basically, grandfathering of sin...

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by DenverTed
Thu Aug 08, 2019 5:54 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 2465
Views: 322285

Re: Boeing 737MAX Grounded Worldwide Q3 2019

What would the bit flip affect on the NG, mach trim, STS, yaw damper, anything the computer controls? Luckily nothing critical, or B, grounding the NG fleet doesn't have the traction of the MAX based on emotional issues and the pragmatic need to have the NG flying to have a functioning air travel sy...

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by DenverTed
Wed Aug 07, 2019 8:52 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 2465
Views: 322285

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Sorry if this had been already discussed (out of the loop for a while and the MAX threads are too prolific to really catch up), but I can’t find whether the real (or alleged) reason for Boeing to change the function of the STAB TRIM CUTOUT switches from NG to MAX has been explained or not. [...] My...

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by DenverTed
Wed Aug 07, 2019 4:10 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 2465
Views: 322285

Re: Boeing 737MAX Grounded Worldwide Q3 2019

So when I get on an NG, if they're doing their job, the FAA can guarantee me that the trim wheel is not a problem, the rudder cables are up to regulation, and the bit flip is not an issue on the mach trim or speed trim systems, in spite of the fact that the NG is single computer and vulnerable to si...

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by DenverTed
Wed Aug 07, 2019 4:03 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 2465
Views: 322285

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Sorry if this had been already discussed (out of the loop for a while and the MAX threads are too prolific to really catch up), but I can’t find whether the real (or alleged) reason for Boeing to change the function of the STAB TRIM CUTOUT switches from NG to MAX has been explained or not. A recap ...

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by DenverTed
Tue Aug 06, 2019 9:35 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 2465
Views: 322285

Re: Boeing 737MAX Grounded Worldwide Q3 2019

So the MAX is switching to dual computer architecture checking each other. The NG is still single computer. Do any other aircraft have single computer, the 767 or 757? Is MCAS really the only automated flight system at catastrophic risk by single computer architecture? I have a hard time believing t...

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by DenverTed
Tue Aug 06, 2019 3:15 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 2465
Views: 322285

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Is the cosmic ray flip flop test in the FAA regulations?

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by DenverTed
Fri Aug 02, 2019 9:09 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 2465
Views: 322285

Re: Boeing 737MAX Grounded Worldwide Q3 2019

The bit flip disable wasn't a random test that went wherever it went. Somebody specifically chose that it would or could disable the MCAS cutout switches and decided on that test case. How many switches are there on an airplane? This seems like choosing a desired result over the scientific method, l...

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by DenverTed
Fri Aug 02, 2019 4:22 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 2465
Views: 322285

Re: Boeing 737MAX Grounded Worldwide Q3 2019

So the bit flip can disable the MCAS cutout switches. What other switches can it disable? I have trouble seeing that one could not find a catastrophic bit flip problem on the NG. I'm sure having two computers checking each other is a good plan, but I think they should have decided this in 2011. Basi...

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by DenverTed
Tue Jul 30, 2019 7:41 pm
Forum: Civil Aviation
Topic: Boeing 797 Thread - 2019
Replies: 1256
Views: 170463

Re: Boeing 797 Thread - 2019

I'm sure Boeing have looked at 3-3, 2-2-2, 2-3-2, and 2-4-2. I believe the quote from them several years ago was that it was a light twin aisle but still deciding configuration. Looking at lengths of 45m, 50m, and 55m, which seem reasonable baseline lengths, obviously the extra width leads to higher...

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by DenverTed
Tue Jul 30, 2019 5:56 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 2465
Views: 322285

Re: Boeing 737MAX Grounded Worldwide Q3 2019

What's the deal with the rudder cables? Is it the same on the NG? Or is something different on the NG in terms of cable routing away or more armoring? This sounds like the trim wheel, low probability, but if they fix it on the MAX, they have to fix it on the NG. Unless they can prove some rationale ...

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by DenverTed
Tue Jul 30, 2019 12:05 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 2465
Views: 322285

Re: Boeing 737MAX Grounded Worldwide Q3 2019

The pilots were faced with a system malfunction Which was caused by an AOA vane failure. Boeing must know the failure rate of these. How many times over the lifetime of the MAX was an AOA failure / MCAS malfunction going to be? Probably hundreds if not more. And all the crews would turn off electri...

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by DenverTed
Mon Jul 29, 2019 6:31 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 2465
Views: 322285

Re: Boeing 737MAX Grounded Worldwide Q3 2019

I guess I've been through different root cause training. From all of the RCA's I've been involved in, which all follows cause mapping, it'd be more like: yes it'll pinpoint MCAS as the main contributing factor but you don't just stop there and move on. You delve into why MCAS is the way it is, into...

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by DenverTed
Sun Jul 28, 2019 1:41 am
Forum: Civil Aviation
Topic: City of Denver threatens to pull Ferrovial-led contract to redevelop DEN terminal
Replies: 105
Views: 12931

Re: City of Denver threatens to pull Ferrovial-led contract to redevelop DEN terminal

How'd they mess up the bathroom design so bad? It's not like bathrooms were new in 1995. Walking into people walking out because the portal is bad design.

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by DenverTed
Sun Jul 28, 2019 1:36 am
Forum: Civil Aviation
Topic: City of Denver threatens to pull Ferrovial-led contract to redevelop DEN terminal
Replies: 105
Views: 12931

Re: City of Denver threatens to pull Ferrovial-led contract to redevelop DEN terminal

The train stations would have to be rebuilt to allow for longer platforms. I guess I must be mistaken, but I thought they had doors that were not in use that could be activated. All 4 boarding positions are presently used. They currently use 4 cars per train. https://upload.wikimedia.org/wikipedia/...

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by DenverTed
Sun Jul 28, 2019 1:27 am
Forum: Civil Aviation
Topic: City of Denver threatens to pull Ferrovial-led contract to redevelop DEN terminal
Replies: 105
Views: 12931

Re: City of Denver threatens to pull Ferrovial-led contract to redevelop DEN terminal

It was quicker to win World War 2 than it is to reconfigure an airport for a food court. How complicated is it?

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by DenverTed
Sat Jul 27, 2019 7:26 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 2465
Views: 322285

Re: Boeing 737MAX Grounded Worldwide Q3 2019

Latest NYT report. Last two paragraphs tell the story. https://www.nytimes.com/2019/07/27/business/boeing-737-max-faa.html 'Days after the Lion Air crash, the agency invited Boeing executives to the F.A.A.’s Seattle headquarters, according to two people with knowledge of the matter. The officials s...

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by DenverTed
Thu Jul 25, 2019 10:39 pm
Forum: Civil Aviation
Topic: Boeing 737 replacement, back on the table in summer 2019?
Replies: 353
Views: 68067

Re: Boeing 737 replacement, back on the table in summer 2019?

Very similar statements can be made for MAX. Very efficient for its targeted missions, newer wing than A320, new winglet/simitar design, optimized rear fuselage, very efficient moving production lines, etc. Not very 'efficient' with its 1960s JT8D-era clearances which was the catalyst for the compl...

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by DenverTed
Thu Jul 25, 2019 10:18 pm
Forum: Civil Aviation
Topic: Boeing 737 replacement, back on the table in summer 2019?
Replies: 353
Views: 68067

Re: Boeing 737 replacement, back on the table in summer 2019?

Ok, so how about this: Focus the first phase of the NSA as a smaller replacement of the 737 with less range. Largest variant would be 737-800 size. Do this phase of NSA together with Embraer. Advantages of this strategy: - You hit Airbus hardest were it is most vulnerable: the A220 (and it’s low sc...

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by DenverTed
Thu Jul 25, 2019 9:32 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 2465
Views: 322285

Re: Boeing 737MAX Grounded Worldwide Q3 2019

How much would ending the MAX cost? Contract penalties, lost revenue for a decade? 50 billion to 1/4 TRILLION? I think they still have a good incentive to fix it, even if it takes 1 to 2 years.

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by DenverTed
Thu Jul 25, 2019 7:23 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 2465
Views: 322285

Re: Boeing 737MAX Grounded Worldwide Q3 2019

If they want to fill the line with an NG, or the 777 line with a 777F, what's the lead time? Isn't it a year or more, so the quickest they fill a hole in production is summer 2020?

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by DenverTed
Wed Jul 24, 2019 6:45 pm
Forum: Civil Aviation
Topic: Boeing 797 Thread - 2019
Replies: 1256
Views: 170463

Re: Boeing 797 Thread - 2019

I meant 10% and 25% bigger than A321. Airbus quotes the A321 as 208 seats 2 Class - 10% more is 228 - right about 797-6 size and and 25% more than 208 is - wait for it - about 260. On the Airbus 321XLR website they actually quote 2 class capacity at 180-220 seats https://www.airbus.com/aircraft/pas...

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by DenverTed
Wed Jul 24, 2019 3:59 pm
Forum: Civil Aviation
Topic: Boeing 797 Thread - 2019
Replies: 1256
Views: 170463

Re: Boeing 797 Thread - 2019

Aerospace analyst Ron Epstein posed a tough question on the status of the New Midmarket Airplane, noting problems with the 787, 747-8, MAX and KC-46A as the problems facing a decision on NMA. Muilenburg acknowledged that design and production risk are part of the business case analysis before green...

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by DenverTed
Wed Jul 24, 2019 1:10 am
Forum: Civil Aviation
Topic: Boeing 797 Thread - 2019
Replies: 1256
Views: 170463

Re: Boeing 797 Thread - 2019

I think a better way to look at it would be start with an A321 and figure it out from there. Supposedly NMA-6 is 5-10% bigger than A321 - as it would probably have one more seat in width (or 16.7% more Y seats and 50% more Premium seats) per meter of fuselage length - lets call that 20% more seats ...

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by DenverTed
Wed Jul 24, 2019 12:48 am
Forum: Civil Aviation
Topic: Will WN ever order the 737 MAX 9 or MAX 10?
Replies: 35
Views: 5563

Re: Will WN ever order the 737 MAX 9 or MAX 10?

The -9 and the -10 aren't flying out of Midway. I could see the -10 with 200 seats for other airports with longer runways on trunk routes. The longshot would be if they put the gear of the -10 on the -9, then WN could operate that out of Midway if the -9 got better field performance.

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by DenverTed
Tue Jul 23, 2019 6:51 pm
Forum: Civil Aviation
Topic: Boeing 797 Thread - 2019
Replies: 1256
Views: 170463

Re: Boeing 797 Thread - 2019

2175301 wrote:

2) I agree with that Boeing has not told us what the 797 actually will be, except that its ovid,

And it will be named the 797 Publius Ovidius Naso-liner.

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by DenverTed
Tue Jul 23, 2019 6:41 pm
Forum: Civil Aviation
Topic: Boeing 797 Thread - 2019
Replies: 1256
Views: 170463

Re: Boeing 797 Thread - 2019

A tight, light 7-across ovoid cross section not massively greater than the cross-section of an A32X would not weigh a lot more than the A321XLR and not be much more expensive. Let's just add 40 inch in cross section, a seatpan, 2 armrests and an aisle. Making a flat cross section adds weight over a...

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by DenverTed
Tue Jul 23, 2019 6:23 pm
Forum: Civil Aviation
Topic: Boeing 797 Thread - 2019
Replies: 1256
Views: 170463

Re: Boeing 797 Thread - 2019

Here just a small info about fineness of existing aircraft. Aerodynamically the best ratio is around 6 but this does not work for airliners because of the tail. For a jetliner the best ratio lies around 7.5-8. Everything above this ratio means more drag, if you are below this the tail (H-Stab) of t...

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by DenverTed
Tue Jul 23, 2019 6:03 pm
Forum: Civil Aviation
Topic: Boeing 797 Thread - 2019
Replies: 1256
Views: 170463

Re: Boeing 797 Thread - 2019

Let us assume a realistic 797 benchmark: :airplane: a NB fuselage :airplane: mass produced :airplane: 2 versions for up to 230-250 passengers :airplane: range up to up to 3700-4700NM, :airplane: rolling of US, China and Euro assembly lines, a few years earlier than a 797. :airplane: an OEW of aroun...

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by DenverTed
Tue Jul 23, 2019 3:46 am
Forum: Civil Aviation
Topic: Boeing 797 Thread - 2019
Replies: 1256
Views: 170463

Re: Boeing 797 Thread - 2019

https://theaircurrent.com/aircraft-development/this-is-boeings-nma/ which seems to reinforce the "small, tight 7-abreast ovoid twin aisle" which the likes of Morrisond and myself think is the only twin aisle configuration that is remotely feasible for NMA. Because if that is what you beli...

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by DenverTed
Tue Jul 23, 2019 1:56 am
Forum: Civil Aviation
Topic: Boeing 797 Thread - 2019
Replies: 1256
Views: 170463

Re: Boeing 797 Thread - 2019

Well Brazil has a skilled and sizeable force of engineers, which have no current project to work on and that is cheaper than a similar sized group of engineers in the USA. And if you need to hire personal for an assembly line Brazil has the skill level and lower costs as well. I can see large parts...

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by DenverTed
Mon Jul 22, 2019 4:35 pm
Forum: Civil Aviation
Topic: Boeing 797 Thread - 2019
Replies: 1256
Views: 170463

Re: Boeing 797 Thread - 2019

The 72 Tonnes I think is an Anet creation - no one knows for sure what the OEW weight will be. If an 797-6 (only 10-20 more seats than A321 not 50) is going to be competitive with A321NEO it's going to have to weigh a lot less than 72 tonnes - which is why I keep banging on about a tight light 7W -...

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by DenverTed
Mon Jul 22, 2019 3:20 am
Forum: Civil Aviation
Topic: Boeing 797 Thread - 2019
Replies: 1256
Views: 170463

Re: Boeing 797 Thread - 2019

The thing I find interesting is whether they can find a capability balance for a two aircraft family. They tried on the 777x, but it looks like the 777-8 could see less production than the 200LR. Will the 797-6 see a similar fate? A 165' to 170' 797-7 may be all that is needed.

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by DenverTed
Sat Jul 20, 2019 3:51 am
Forum: Civil Aviation
Topic: Updated: Boeing website updated to match FR's Boeing 737MAX200 rename
Replies: 116
Views: 6308

Re: Boeing website updated to match Ryanair's Boeing 737MAX200 rename.

Is 210 the exit limit, or is there some regulation for minimum pitch which limits the number of seats that can fit in the -8?

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by DenverTed
Thu Jul 18, 2019 4:06 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q3 2019
Replies: 2465
Views: 322285

Re: Boeing 737MAX Grounded Worldwide Q3 2019

3. allow the crew to disable automatic trim systems without disabling manual electric trim that sounds tricky.... maybe someone with knowledge of the 737 system design can elaborate how this could be achieved Even thought there were two switches on the NG to do this, was there a procedure that call...

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by DenverTed
Thu Jul 18, 2019 4:24 am
Forum: Civil Aviation
Topic: A321neo operators alerted over 'excessive pitch' anomaly
Replies: 92
Views: 25365

Re: A321neo operators alerted over 'excessive pitch' anomaly

Why is this on the A321n and not the A320n?

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by DenverTed
Thu Jul 18, 2019 3:11 am
Forum: Civil Aviation
Topic: Boeing 797 Thread - 2019
Replies: 1256
Views: 170463

Re: Boeing 797 Thread - 2019

Part of the business case will be the decision of where will the 797 be built. I think it's likely that Boeing is already engaged in talks for tax breaks, construction and land discounts, as well as job creation incentives with some strong non-disclosure agreements in place. That will be a huge dri...

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by DenverTed
Thu Jul 18, 2019 2:42 am
Forum: Civil Aviation
Topic: “Dear American Airlines, I Hate You With My Whole Heart.” writes disgruntled traveler
Replies: 179
Views: 23156

Re: “Dear American Airlines, I Hate You With My Whole Heart.” writes disgruntled traveler

What's the airlines logic for cancelling all legs if one leg is missed? Other than, because they can, and sell the seat twice?

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by DenverTed
Wed Jul 17, 2019 9:00 pm
Forum: Civil Aviation
Topic: Passenger on AA from KIN-MIA asked to deboard to change from her romper outfit
Replies: 117
Views: 8185

Re: Passenger on AA from KIN-MIA asked to deboard to change from her romper outfit

Does AA have a clearly outlined dress code for their flights? From their Conditions of carriage page: Complying with airline rules for safety You're required to act in a way that ensures a safe environment for everyone on board. You must: Allow you and your bags to be searched for explosives, dange...

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by DenverTed
Wed Jul 17, 2019 6:08 pm
Forum: Civil Aviation
Topic: Passenger on AA from KIN-MIA asked to deboard to change from her romper outfit
Replies: 117
Views: 8185

Re: Passenger on AA from KIN-MIA asked to deboard to change from her romper outfit

Who goes barefoot in an airplane lav? I'm not a clean freak, but that one caught my attention. Especially for an MD. She ought to know how unhygenic it is. Where does it say that she went into the airplane lav barefoot? It doesn't. I was responding to trex8 commenting on dress on hawaiian flights. ...

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by DenverTed
Wed Jul 17, 2019 5:20 pm
Forum: Civil Aviation
Topic: Passenger on AA from KIN-MIA asked to deboard to change from her romper outfit
Replies: 117
Views: 8185

Re: Passenger on AA from KIN-MIA asked to deboard to change from her romper outfit

A couple things - It's summer - on almost any flight you will see at least a couple of women wearing one of those - Out of the rompers I've seen people wearing hers is actually far less revealing - the shorts go down further than many and hardly any cleavage is showing. Which goes to the question o...

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by DenverTed
Wed Jul 17, 2019 5:16 pm
Forum: Civil Aviation
Topic: Boeing 797 Thread - 2019
Replies: 1256
Views: 170463

Re: Boeing 797 Thread - 2019

2175301 wrote:
Its Ovid.

I thought twin aisle was a given too. So we know it is an Ovid twin aisle, correct? And proposals for up to 52K engines is not speculation, that is a fact.

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by DenverTed
Wed Jul 17, 2019 4:37 pm
Forum: Civil Aviation
Topic: Passenger on AA from KIN-MIA asked to deboard to change from her romper outfit
Replies: 117
Views: 8185

Re: Passenger on AA from KIN-MIA asked to deboard to change from her romper outfit

This entire thread painfully reminds me of John Updaike's A&P . Personally, I hate the calls for million dollar lawsuits against AA. I've said this before, and I'll likely say this a hundred times over, people are people, and people will always do their own thing on or off their employer's time...

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